pH & EC Control

Bluelab Probe Care Kit - pH is a kit containing everything needed to clean, hydrate and calibrate your pH meter probe:

• Instructions on how to care for your probe
• 2 x Bluelab pH 7.0 Calibration Solution - Sachet 20ml
• 2 x Bluelab pH 4.0 Calibration Solution - Sachet 20ml
• 2 x Bluelab pH Probe KCl Storage Solution - Sachet 20ml
• 3 plastic cups
• Probe cleaning solution
• Bluelab toothbrush (probe cleaning tool)

1. Your pH meter is only as accurate as its probe is clean. Accurate measurements simplify crop growing and ensure improved growth.
2. Cleaning and correctly storing your pH probe ensure the most accurate measurements possible and maximise the probe’s life.
3. The probe surface is where the instrument measures the solution/soil. If the probe is unclean and contaminated, measurements may be inaccurate. Like a car windscreen, if it is dirty, you cannot see the road. If the probe is contaminated, it cannot measure the concentration of the solution/soil.
4. The pH probe must be kept wet at all times for optimum performance and a long life!

Milwaukee pH 4.01 230 ml buffered solution / liquid for calibrating pH meters. Calibrating your pH meter is a simple procedure for optimum performance and should be performed whenever your meter's readings appear questionable. Calibration should be carried out at least once a month!

• accuracy: ±0.01 pH
• value: 4.01 pH at 25°C
• volume: 230 ml

Milwaukee calibration liquids are designed to help you achieve reliable and repeatable pH measurements while extending the life of your instrument.

Bluelab Nutrient Meter is designed for hydroponically grown crops that require a higher-than-normal EC or CF level (electrical conductivity or nutrient-solution concentration) during their growing cycle.

• completely waterproof
• The 40.7cm length enables convenient stirring of the nutrient solution directly in the reservoir!
• No calibration required (factory calibrated)!
• Provides measurements on EC, CF, ppm700 and ppm500 scales
• Automatic on/off function
• 5-year warranty
• EC measurement range: 0.2 - 3.6
• EC measurement accuracy: ± 0.1 at 25°C

Full product technical specifications here!

When growing hydroponically, it is essential to KNOW the strength of the nutrient solution before giving it to your plants. If conductivity readings are too low, your plants may not receive enough nutrients. If readings are too high, plants can become dehydrated. To take a measurement, simply place the probe in the solution and the reading will be indicated by the flashing lights.

🔹  The Milwaukee Pocket Tester Kit (pH51 and EC66) is ideal for quickly and accurately measuring pH and electrical conductivity (EC) in various environments, including hydroponics, aquariums, swimming pools, and laboratories. The kit includes two portable, waterproof testers with LCD displays that ensure easy use and reliable results.

🔹 Detailed specifications:

pH51 - pH Tester:

• Measuring range: 0.0 - 14.0 pH
• Resolution: 0.1 pH
• Accuracy: ±0.1 pH
• Calibration: Manual, two-point (pH 4.01 and pH 7.01)
• Electrode: Replaceable MA73600 with double junction
• Water resistance: IP65
• Temperature range: 0 to 50°C
• Battery: 3 x 1.5V (included), battery life of over 1500 hours
• Dimensions: 165 x 30 x 30 mm
• Weight: 80 g

EC66 - Electrical Conductivity (EC) Tester:

• Measuring range: 0.00 - 10.00 mS/cm
• Resolution: 0.01 mS/cm
• Accuracy: ±2% of full scale
• Calibration: Manual, one-point (1413 µS/cm)
• Temperature compensation: Automatic (5 to 50°C)
• Electrode: Replaceable MA73076
• Water resistance: IP65
• Battery: 3 x 1.5V (included), battery life of approximately 250 hours
• Dimensions: 165 x 30 x 30 mm
• Weight: 80 g

 Kit contents:

• 1 x pH51 pH Tester
• 1 x EC66 Electrical Conductivity Tester
• 1 x Calibration kit (pH 4.01, pH 7.01, and 1413 µS/cm solutions)
• 1 x Small calibration screwdriver
• 1 x Protective storage case

✅ Benefits of use:

• Fast and accurate measurements: Easy to use with quick results.
• Suitable for various applications: Ideal for hydroponics, aquariums, swimming pools, and laboratories.
• Waterproof and durable: Suitable for use in various conditions.
• Easy maintenance: Replaceable electrodes and long battery life.

Growth Technology pH Probe Refill & Storage Solution is a specialised solution for maintaining, refilling and storing pH electrodes with liquid electrolyte. Regular use of the solution helps maintain accurate measurements, extends electrode life and prevents the sensitive measuring membrane from drying out.

Every pH electrode needs proper maintenance to provide accurate and reliable measurements. Growth Technology pH Probe Refill & Storage Solution is specially developed for pH probes and electrodes with liquid electrolyte, allowing both replenishment of the internal solution and proper storage between measurements.

During normal use, the electrolyte level in pH electrodes gradually decreases. Regular topping up with a suitable solution helps maintain correct electrode operation and ensures consistent measurement accuracy.

In addition to being a refill solution, the product also serves as a pH probe storage solution. When the electrode is not in use, its glass tip should remain immersed in a suitable liquid. This prevents the membrane from drying out and significantly extends the measuring instrument's service life.

The formula contains diluted potassium chloride (KCl), which maintains the electrode in optimal condition and helps preserve its sensitivity and accuracy even during prolonged use.

Technical specifications

✔️ Manufacturer: Growth Technology

✔️ Product type: pH probe refill and storage solution

✔️ Pack size: 300 ml

✔️ Main ingredient: Diluted potassium chloride (KCl)

✔️ Suitable for pH electrodes with liquid electrolyte

✔️ Maintains the correct electrolyte level

✔️ Prevents the electrode from drying out

✔️ Improves measurement accuracy

✔️ Extends pH probe life

✔️ Suitable for laboratory, hydroponic and horticultural applications

❌ Not suitable for gel-filled probes

Benefits

✔️ Maintains maximum pH-measurement accuracy

✔️ Protects electrodes from drying out

✔️ Extends probe service life

✔️ Suitable for both storage and refilling

✔️ Reduces the risk of incorrect readings

✔️ Easy to use

✔️ Suitable for all hydroponic and gardening systems using pH meters with liquid electrolyte

Application

Suitable for:

• pH meters

• pH electrodes with liquid electrolyte

📋 Instructions for use

For storage: Immerse the pH electrode tip in a small amount of solution when the device is not in use. This keeps the membrane moist and prevents loss of accuracy.

For refilling: Follow your pH meter manufacturer’s instructions and top up the electrolyte as needed to maintain the correct level in the electrode.

💡 Urban Botaniks tip: Never store a pH electrode in distilled or reverse-osmosis water. This can damage the membrane and significantly reduce measurement accuracy. For maximum probe life, always use a specialised storage solution such as Growth Technology pH Probe Refill & Storage Solution. 🧪🌱

Bluelab pH Probe Storage Cap. It is essential to replace the storage cap on the tip of the pH probe immediately after use and while it is stored. "If it dries out, it dies!". Keep the tip of the pH probe wet by ensuring there is enough Bluelab pH Probe KCl Storage Solution to cover it.

Take quick EC and temperature readings of your solution with the Bluelab Conductivity pen!

• completely waterproof
• simple one-point calibration
• 1-year warranty
• automatic shut-off function to extend battery life
• 1 x AAA alkaline battery (included)
• measurement range EC: 0.0 - 10.0
• accuracy: ± 0.1 at 25°C

Full product technical specifications here!

This Bluelab EC pen simply shows whether your plants are receiving the right amount of nutrients and lets you know if any adjustments to the solution are required. To feed your plants well, you need to know what you are feeding them! Measuring conductivity every day is the best way to avoid over-diluting or over-concentrating your nutrient solution. Replace the reservoir solution completely every 7 days. Top up nutrient levels between changes so your plants always have the food they need. Bluelab Conductivity Pen also measures solution temperature, as root health is vital to a successful harvest. Temperature affects the rate of growth and plant structure, so a solution temperature of 18-22°C is recommended.

• completely waterproof
• simple one-point calibration
• 1-year warranty
• automatic shut-off function to extend battery life
• 1 x AAA alkaline battery (included)
• measurement range EC: 0.0 - 10.0
• accuracy: ± 0.1 at 25°C
• Selectable conductivity and temperature units (EC/ppm,C°/F°)
• Backlit LCD display
• Tick mark indicating successful calibration
• Measurement hold function
• Low battery indicator

professional pH monitor for continuous use

pH monitor for continuous monitoring of hydroponic or fertiliser solutions, aquariums and aquaponic systems, swimming pools and more. Convenient visual indication function when the pH of the solution crosses a set value (up or down, selectable by knob). Manual calibration at 2 fixed points – pH 4 and pH 7.

Separately connectable sensor, compatible with pH monitors from other manufacturers.


range: pH from 0.0 to 14.00
pH indication adjustment range: 3.5 - 7.5
resolution: 0.1 pH
accuracy: ±0.2pH
calibration: manual, at two points (at pH 4 or 10, 7)
LED indication when set values are crossed
set includes: 12V power adapter; electrode with 2m cable; pH 7 calibration liquid.
Dimensions: 149 x 83 x 32 mm; 160g
Manufacturer's warranty – 2 years for the device, 6 months for the sensor. Does not apply to mechanical damage and improper use!

Automate pH control of your solution with the Milwaukee MC122 PRO pH Controller!

The Milwaukee MC122 PRO pH Controller automatically monitors and finely adjusts pH levels. Simply set your pH parameters and let the MC122 PRO do the rest. Recommended for hydroponic plant cultivation or aquariums.

• pH measurement accuracy: pH: ± 0.2 with two-point manual calibration
• control range: from 5.5 to 9.5 pH with alarms activated when readings are above or below the set value
• pH electrode: MA911B/2  (included)
• compatible with dosing pump Milwaukee MP810 1.5 L/h (25 ml/min) (not included)
• device warranty: 2 years
• pH probe warranty: 6 months

Instructions for use here.

• pH measurement accuracy: pH: ± 0.2 with two-point manual calibration
• control range: from 5.5 to 9.5 pH with alarms activated when readings are above or below the set value
• pH electrode: MA911B/2  (included)
• compatible with dosing pump Milwaukee MP810 1.5 L/h (25 ml/min) (not included)
• operating environment: 0–50°C; max. 95% RH
• power supply: 12 VDC adapter  (included)
• mounting kit: included
• dimensions: 15 x 8 x 3.4 cm
• weight: 180 g

You can extend the life of your pH electrode as follows:

1. Storage: The pH probe must be kept hydrated. Long periods of dry storage will harm the probe's sensitivity. Allowing the probe to dry may also cause deposits and clogging at its tip. Storing it in MA9015 storage solution or pH calibration buffers will help address both issues. Do not store in tap water or distilled water! This will damage the probe's sensitivity. The best way to store the probe is with the probe cap filled with storage solution or calibration buffer and the cap tightened to prevent leakage. It is also recommended that the electrode be stored upright to further reduce the potential for leakage.
2. Cleaning: Deposits on the probe tip from the mineral salts of the nutrient solution or from organic material can affect its sensitivity and clog it. We recommend regularly soaking your electrode in MA9016 cleaning solution.
3. Calibration: the glass tip of the pH probe becomes less sensitive over time, so make sure you calibrate regularly to keep your Milwaukee MC122 PRO pH Controller accurate. Also calibrate after cleaning or a long period of storage.

ACCURATE. SIMPLE. RELIABLE. 24 HOURS / 7 DAYS A WEEK pH/EC/ temperature monitoring.

Milwaukee MC811 MAX pH/EC/Temp Monitor lets you monitor pH/TDS/Temp levels automatically 24/7! Simply calibrate the parameters and let the MC811 MAX do the rest. The Milwaukee pH/EC/Temp monitor is preferred by people who want continuous visibility of their pH and nutrient levels 24 hours a day, 7 days a week. Common applications include nutrient reservoirs, hydroponic systems and aquariums. The monitor offers: measurement range: 0.0 - 12.0

• pH / 0.00 - 5.00 mS/cm EC / -10.0 to 60.0°C  measurement accuracy: ± 0.2 pH / ±
• 2% EC / 0.3°C temp. resolution: 0.1 pH / 0.01 mS/cm / 
• 0.1°C easy calibration: 2-point (pH)
• and 1-point (EC), manual quick and easy-to-read results, thanks to
• 3 large LCD displays pH probe MA911B/2 (included in the set)
• Simply calibrate the parameters and start

monitoring 24/7! Instructions for use here. Milwaukee

MC811 MAX pH/EC/Temp Monitor

offers: pH measurement accuracy: pH: ± 0.2

• (with a measurement range of 0 -12.0 pH) EC measurement accuracy: EC: ±
• 2% (at full EC scale) Easy two-point pH calibration
• and one-point EC calibration pH probe MA911B/2
• (included in the set) for easy maintenance and high performance. 2
• m pH probe cable 12
• VDC power supply
• dimensions: 160 x 110 x 35
• mm weight: 560
• g device warranty: 2 years
• pH probe warranty: 6 months You

can extend the life of your pH electrode as follows:

1. Storage: The pH probe must be kept hydrated. Long periods of dry storage will harm the probe's sensitivity. Allowing the probe to dry out can also cause deposits and blockages at its tip. Storing it in MA9015 storage solution or pH calibration buffers will help address both issues. Do not store in tap water or distilled water! This will damage the probe's sensitivity. The best way to store the probe is with the probe cap filled with storage solution or calibration buffer and the cap tightened to prevent leakage. It is also recommended to store the electrode upright to further reduce the risk of
2. leakage. Cleaning: Deposits on the probe tip from nutrient-solution mineral salts or organic material can affect its sensitivity and clog it. We recommend regularly soaking your electrode in MA9016 cleaning solution. Calibration: the
3. glass tip of the pH probe becomes less sensitive over time, so make sure you calibrate regularly to keep your MAX monitor accurate. Also calibrate after cleaning or a long period of storage.

Bluelab OnePen is an "all-in-one" meter that simplifies your daily measurements. It lets you measure acidity (pH), conductivity (EC / PPM), total dissolved solids (TDS) and the temperature of your nutrient solution. Once connected to the Edenic App, you can remotely monitor recorded readings via your smartphone or desktop computer.

• replaceable sensor and its status indicator
• accurate measurements, with resolution up to 0.01 pH
• simultaneously displays recorded pH and EC readings on the display
• measures conductivity in EC, CF, PPM 500 (TDS) or PPM 700
• measures temperature in C° and F° scales
• dust- and waterproof (IP68)

The set includes:

• 1x Bluelab OnePen with replaceable pH, conductivity (EC) and temperature sensor
• 1x 20 ml sachet pH 7.0 Bluelab calibration solution
• 1x 20 ml sachet pH 4.0 Bluelab calibration solution
• 1x 20 ml sachet KCl Bluelab storage solution
• 1x sensor cleaning brush for Bluelab sensor
• 2x AAA batteries

Warranty:

• 2 years for the meter
• 6 months for the sensor
• Proof of purchase is required. For full terms and conditions, visit bluelab.com/product-warranty

Technical specifications:

• pH measurement range: 0.0 - 14.0 pH
• pH resolution: 0.01 pH
• measurement accuracy at 25°C / 77°F (pH): ± 0.05 pH
• pH calibration: two-point, at 7.0 and 4.0 or 10.0
• conductivity measurement units: EC, CF, ppm500 (TDS), ppm700, mS/cm
• conductivity measurement range: 0 - 10.0 EC, 0 - 100 CF, 0 - 5000 ppm 500 (TDS), 0 - 7000 ppm (EC x 700), 0 - 10.0 mS/cm
• conductivity resolution: 0.01 EC, 0.1 CF, 10 ppm500 (TDS), 10 ppm700, 0.01 mS/cm
• measurement accuracy at 25°C / 77°F (conductivity): ±0.1 EC, ±1 CF, ±50 ppm500 (TDS), ±70 ppm700, ±0.1 mS/cm
• conductivity calibration: factory calibrated
• temperature measurement units: °C, °F
• temperature measurement range: 0 - 50°C, 32 - 122°F
• temperature resolution: 0.1
• measurement accuracy at 25°C / 77°F (temperature): ±1
• temperature calibration: not required (factory calibrated)
• temperature compensation: yes
• operating environment:  0 - 50°C / 32 - 122°F (do not use or store outside this temperature range), dust- and waterproof (IP68)
• power supply: 2 x AAA alkaline batteries (included)
• certifications: CF, FCC, IC, UKCA. Contains Bluetooth module IC:8017A-MDBT50Q, FCC ID: SH6MDBT50Q 
• signal range (indoors / urban environment / outdoors): 10 metres
• radio signal: Bluetooth: 5 (low energy)
• system requirements (Edenic App): Android (8.0 or later) or iOS (12 or later)

Buffer solution for calibrating pH measuring devices – pens, monitors and controllers.

• preset accurate and stable pH value: 4.0
• suitable for Bluelab®
• volume: 300 ml

pH measuring devices must be calibrated regularly. Follow the instructions supplied with the device.

For 2-point calibration, use pH Buffer 4 and pH Buffer 7, unless the instructions state otherwise. Store the probe in Growth Technology pH probe storage solution.

Storage conditions:

1. Store in a cool place!
2. Keep out of reach of children!

Milwaukee Pocket tester kit (pH55 and EC60) is ideal for measuring pH, electrical conductivity (EC/TDS) and temperature (°C/°F) in your plants' nutrient solution. The kit includes:

• 1x waterproof pH meter Milwaukee pH55
• 1x waterproof EC meter Milwaukee EC60
• 1x calibration solution Milwaukee pH 4.01 20ml
• 1x calibration solution Milwaukee pH 7.01 20ml
• 1x calibration solution Milwaukee 12880 µS/cm (EC) 20ml
• 1x storage case

🔹 pH Calibration Solution 4.01 - 300 ml is specially formulated for calibrating pH meters, ensuring accurate and precise measurements. With its stable pH level of 4.01 at 25°C, it is ideal for checking and adjusting measuring instruments used in hydroponics, aquariums, laboratories, and other applications.

🔹 Detailed specifications:

• Volume: 300 ml
• pH value: 4.01 at 25°C
• Application: Calibration of pH meters
• Composition: Complies with international standards for calibration solutions
• Manufacturer: Wather Masters

🔹 Recommendations and instructions for use:

1. Pour a small amount of the solution into a clean container.
2. Immerse the pH meter electrode in the solution.
3. Perform calibration according to the manufacturer's instructions for your pH meter.
4. After use, discard the used solution and do not return it to the original container to avoid contamination.

✅ Benefits of use:

• Accuracy: Provides precise pH measurements.
• Easy to use: Convenient for use in both laboratory and field conditions.
• Compatibility: Suitable for most pH meters on the market.
• Durability: Stable pH value, ensuring reliable calibration of your instruments. 

Bluelab Probe Care Kit - Conductivity is a kit containing everything needed to clean and test the probe of your EC meter (a device for measuring electrical conductivity):

• Instructions on how to care for your probe
• 2 x Bluelab 2.77 EC Conductivity Standard Solution Sachet 20 ml for single use
• Plastic cup
• Probe cleaning solution
• Probe cleaning tool

The measurements of your EC meter are only as accurate as its probe is clean. Accurate measurements simplify crop growing and ensure improved growth.
Proper maintenance of the EC instrument's probe ensures the maximum possible extension of both its service life and that of the instrument.
The probe surface is where the instrument measures the solution. If the probe is unclean and contaminated, measurements may be inaccurate. Like a car windscreen: if it is dirty, you will not be able to see the road! If the probe is contaminated, it cannot measure the concentration of the solution.
Tip ... if the measured electrical conductivity levels are too low, the probe needs cleaning.

This combined 3-in-1 meter lets you measure pH, EC (electrical conductivity) and TDS (total dissolved solids) with one meter and a single probe! Designed for growers

using hydroponics, aquaponics and greenhouses, Milwaukee MW802 PRO is exceptionally robust and easy to use – with one probe, a large screen and easy calibration. The meter’s robust construction and sturdy yet replaceable probe mean you can expect years of use. pH,

• EC (electrical conductivity), TDS (ppm) with automatic temperature compensation
• replaceable, integrated pH, EC and TDS (ppm) SE600 probe with a 1 m cable (included in
• the set) large, easy-to-read display
• factory calibrated (single-point calibration for pH and EC)
• measurement range: 0.00 - 14.00 pH / 0.00 - 6.00 mS/cm / 0 - 4000 ppm measurement accuracy: ±0.2 pH / ±2%
• full scale EC/TDS specially designed for use in
• hydroponics, aquariums and greenhouses Instructions for use and technical

specifications here. temperature compensation: automatic, 0 - 

• 50°C calibration: initially factory, manual, single-point
• pH calibration: solution for pH
• 7.01 calibration - 20 ml EC / TDS calibration: 1413 µS/cm
• calibration solution - 20 ml or 1500 ppm calibration solution - 20 ml probe: integrated combination SE-600 operating environment: 0 - 50°C;
• max. 95% RH. battery
• type: 1 x 9V battery life: approximately 150
• hours of use automatic shut-off (auto-off)
• function: after 8 min. of inactivity dimensions:
• 143 x 80 x 32 mm weight: 220 g 
• (with batteries) device warranty: 2 years
• probe warranty: 6 months pH
• and conductivity are extremely important
• for professional gardeners and large-scale

growers. pH can affect plants' uptake of nutrients and water and reduce the effectiveness of fertilisers, herbicides and pesticides. Managing conductivity helps growers determine the precise fertiliser or other plant needs. Care and use: The MW802 PRO portable 3-in-1 meter includes both a pH and

EC sensor in the integrated SE600 probe. All pH sensors have a limited lifespan, and their response time becomes longer over time. EC sensors are more robust but can still be affected by residue build-up. Both require maintenance. Proper maintenance of your probe will give you fast, accurate results for longer. Here are our four top tips. Always store with the cap filled with buffer

1. or MA9015 storage solution, and not with water. Clean your probe regularly by soaking it in
2. MA9016 cleaning solution. Calibrate after cleaning and/or storage before testing
3. to correct changes in the pH and EC sensor. Gently stir the probe
4. in the sample for a faster result.

Quickly and consistently measure moisture, nutrient levels (measured via electrical conductivity) and temperature directly in the root zone. Bluelab Pulse Meter connects directly to your smartphone via the Pulse app for automated data collection, measurement comparison, storage and export.

Download the Pulse app for Android (version 5.1 and later) here!

• Measures electrical conductivity, moisture and temperature
• Probe length 20cm
• Total instrument length 50cm
• Minimum pot size 2L.
• Android version 5.1 and later
• Bluetooth version 4.0 and later
• iOS 12.1 + (iPhone only)
• 1 x AA alkaline battery
• 1-year warranty

Bluelab Pulse Meter allows you to take measurements regardless of the growing medium: soil, coco or rockwool. Measuring, comparing and adjusting data is now faster than ever. Achieve better yields, reduce shrinkage and grow healthier plants!

Plant health is in your hands.

Stay informed about moisture levels: optimise irrigation cycles and water use; control the risk of root infections.

Stay informed about nutrient levels: optimise growth by providing the right amount of nutrients for your plants’ growth stage.

Stay informed about temperature levels: optimise root function; monitor for temperature fluctuations.

• Broaden your horizons with the latest technology and deepen your knowledge of plants and their performance!
• Take more, faster measurements with direct measurement technology!
• View all root-zone data, conduct research and take notes in the Pulse app!
• Set target ranges for nutrient and moisture levels and receive immediate real-time feedback in the field!

Product technical specifications here!

Milwaukee MA9069 5000 µS/cm Conductivity Solution 230ml is a buffered solution / calibration liquid for electrical conductivity (EC) meters.

• accuracy: ±0.01 EC
• value: 5000 µS/cm at 25°C
• volume: 230 ml
• for repeated calibration

Buffer solution for calibrating pH-measuring devices - pens, monitors and controllers.

• pre-set, accurate and stable pH value: 7.0
• suitable for Bluelab®
• volume: 300 ml

pH measuring devices must be calibrated regularly. Follow the instructions supplied with the device.

For 2-point calibration, use pH Buffer 4 and pH Buffer 7, unless the instructions state otherwise. Store the probe in Growth Technology pH probe storage solution.

Storage conditions:

1. Store in a cool place!
2. Keep out of reach of children!

Bluelab pH Probe KCl Storage Solution 250ml is the ideal solution for storing and hydrating your Bluelab pH probes or pens. Every self-respecting gardener should have it if they want to extend the life of these sensitive glass instruments as much as possible; they naturally age with daily use. The storage solution is suitable for / compatible with:

• Bluelab pH pen
• Bluelab Soil pH pen
• Bluelab pH Meter
• Bluelab pH Probe

Instructions for use:

• Add Bluelab pH Probe KCl Storage Solution to the cap of the pH pen / probe for storage after use and hydrate it with the solution once a month.

Bluelab EC 2.77 is a calibration solution designed for checking and setting EC (electrical conductivity) meters and probes. The single-use 18 ml dose ensures a fresh, accurate solution every time for reliable measurements. Suitable for hydroponics, coco and soil growing.

Value: 2.77 EC (mS/cm) — standard reference value for calibrating EC instruments.

Volume: 18 ml — single-use sachet format, ensuring a clean, unchanged solution with every use. Do not reuse, as the value changes when the solution stands!

Function: used for calibrating, testing and checking EC probes and instruments, ensuring accurate results when measuring nutrient solutions.

Compatibility: suitable for all Bluelab EC instruments and other compatible measuring devices.

Application: used in hydroponics, greenhouses and for monitoring plant nutrient solutions.

Recommendations for use:

Calibration: immerse the probe in the solution and follow the instrument’s calibration instructions.

Accuracy: always use fresh liquid — single-use sachets guarantee the best results.

Cleaning: before calibration, rinse the probe with clean water to avoid contaminating the solution.

Storage: store in a cool, dry place away from direct light and heat to preserve product quality.

Milwaukee MA911B/2 is a replacement pH probe for the pH meter Milwaukee MC110 PRO (sold separately).

• measures: pH and temperature of solutions
• measurement range: 0.0 - 14.0 pH
• operating environment: -5 to 70°C
• dimensions: 12 / 16 cm, ⌀ 1.27 cm
• cable length: 2 m
• connection: BNC
• warranty: 6 months

You can extend the life of your pH electrode as follows:

1. Storage: The pH probe must be kept hydrated. Long periods of dry storage will harm the probe's sensitivity. Allowing the probe to dry may also cause deposits and clogging at its tip. Storing it in MA9015 storage solution or pH calibration buffers will help address both issues. Do not store in tap water or distilled water! This will damage the probe's sensitivity. The best way to store the probe is with the probe cap filled with storage solution or calibration buffer and the cap tightened to prevent leakage. It is also recommended that the electrode be stored upright to further reduce the potential for leakage.
2. Cleaning: Deposits on the probe tip from the mineral salts of the nutrient solution or from organic material can affect its sensitivity and clog it. We recommend regularly soaking your electrode in MA9016 cleaning solution.
3. Calibration: the glass tip of the pH probe becomes less sensitive over time, so make sure to calibrate regularly to keep your meter accurate. Also calibrate after cleaning or a long period of storage.

professional EC monitor for continuous use

EC monitor for constant monitoring of hydroponic or fertiliser solutions, aquariums and aquaponic systems, swimming pools, etc. Convenient visual-indication function when the solution EC passes a set value (upward or downward, selectable by knob). Manual calibration at EC 1413 μS/cm.


range: 0.0-10.0 mS/cm
resolution: 0.1 mS/cm
accuracy: ±2%
EC indication can be set to: 1-5 mS/cm
calibration: manual, one point
LED indication upon reaching set values
automatic temperature compensation
package includes: 12V power adapter; electrode with 2m cable; calibration solution 1413 μS/cm
Dimensions: 149 x 83 x 32 mm; 160g
Manufacturer's warranty - 2 years for the device, 6 months for the sensor. Does not apply to mechanical damage or improper use!

Calibration solution for conductivity (EC) measuring devices – pens, monitors and controllers.

• preset EC value: 1.413 mS/cm
• suitable for Bluelab®
• volume: 300 ml

Electrical conductivity (EC) meters must be calibrated regularly. Follow the instructions supplied with the meter. After use, always rinse the probe with clean water and dry it with a tissue.
The Bluelab Truncheon EC meter does not require calibration! However, it should be checked regularly with this solution. If the reading is low or different from 2.76 mS/cm, the probe tip must be cleaned carefully; also check the batteries.

Storage conditions:

1. Store in a cool place!
2. Keep out of reach of children!

Bluelab pH ProbePlus is an original replacement probe designed for the professional Bluelab pH PenPlus meter. Thanks to its replaceable design, you can easily restore the instrument's factory accuracy without replacing the entire meter. The probe measures pH and temperature, features Double Junction technology for more stable measurements, and can be replaced in seconds without tools.

Bluelab pH ProbePlus is designed as a replaceable measuring module for the Bluelab pH PenPlus and is made to provide long-term reliability and maximum accuracy when measuring pH. Rather than replacing the entire instrument after the electrode's natural wear, you only need to replace the probe. This reduces costs, minimises downtime and extends the life of your pH PenPlus.

The probe uses a Double Junction (double-junction) pH electrode, which provides more stable readings and a longer service life than standard pH electrodes. This technology reduces the risk of contamination of the reference system and ensures reliable measurements even during intensive daily use in nutrient solutions.

The built-in temperature sensor enables simultaneous measurement of pH and temperature, ensuring correct results under different operating conditions. Thanks to the screw mounting system, the probe can be replaced quickly and without tools.

The probe is supplied with a KCl silicone cap with an internal sponge, which keeps the electrode continuously hydrated during storage. With proper maintenance, regular cleaning and periodic calibration, ProbePlus delivers long-lasting, reliable performance.

Technical specifications

✔️ Manufacturer: Bluelab

✔️ Model: pH ProbePlus (PROBPLUSPH)

✔️ Type: Replacement pH and temperature probe

✔️ Compatibility: Only with Bluelab pH PenPlus

✔️ Measured parameters:

• pH
• Temperature

✔️ pH range: 0.0 – 14.0 pH

✔️ Operating temperature: 0 – 50°C

✔️ Temperature: 0-50°C

✔️ Double Junction pH technology

✔️ Screw system for quick replacement

✔️ Tool-free replacement

✔️ KCl silicone cap with internal moistening sponge

✔️ Designed for professional daily use

✔️ Limited warranty: 6 months

📦 The set includes

✔️ 1 × Bluelab pH ProbePlus

✔️ 1 × Buffer solution pH 7.0 (18 ml)

✔️ 1 × Buffer solution pH 4.0 (18 ml)

✔️ 1 × KCl Storage Solution (18 ml)

✔️ 1 × Quick-start guide

Benefits

✔️ Original replacement probe from Bluelab

✔️ Replace only the probe, not the entire device

✔️ Restores the factory accuracy of pH PenPlus

✔️ Double Junction technology for longer life

✔️ Quick tool-free replacement

✔️ Measures pH and temperature simultaneously

✔️ Reduces maintenance costs

✔️ KCl cap protects the electrode from drying out

✔️ Suitable for professional daily use

🔧 Application

Suitable for:

• Hydroponic systems

• Coco substrates

• Soil cultivation

• Aquaponics

• Greenhouses

• Measuring nutrient solutions

• Laboratory applications

• Professional horticulture

• Only for Bluelab pH PenPlus

📋 How to use

1. Unscrew the used probe from Bluelab pH PenPlus.
2. Screw in the new Bluelab pH ProbePlus until snug.
3. Calibrate the probe with the pH 7.0 and pH 4.0 buffer solutions.
4. Rinse the probe with clean water after every measurement.
5. Always store the electrode in KCl solution inside the protective silicone cap.
6. Clean and calibrate regularly for maximum accuracy.

⚠️ Important: pH electrodes are consumable items. Their sensitivity naturally decreases over time. Replace the probe if readings stabilise more slowly or calibration becomes difficult. With proper maintenance and storage, Bluelab pH ProbePlus provides reliable long-term performance.

💡 Urban Botaniks tip: To maximise probe life, use Bluelab pH Care Kit regularly for cleaning and calibration, and never allow the electrode to dry out. Storing it in KCl solution ensures a longer service life and consistently accurate measurements.

The waterproof 4-in-1 pH/EC/TDS/Temp tester MW804 MAX by Milwaukee is an "all-in-one" measuring instrument that makes it easy to take daily measurements. It lets you measure the pH, conductivity (EC), total dissolved solids (TDS) and temperature of the nutrient solution.

• measuring range: 0.00-14.00 pH / 0.00 - 20.00 mS/cm EC / 0.00 - 10.00 ppt TDS / 0.0 - 50.0°C temp.
• resolution: 0.01 pH / 0.01 mS/cm / 0.01 ppt / 0.1°C
• accuracy: ±0.05 pH / 2% EC/TDS / ±0.5°C
• calibration: automatic
• fast and easy-to-read results on a large digital LCD display
• automatic shut-off function (auto-off): after 8 minutes of inactivity
• completely waterproof (IP65)

Instructions for use here*.

Features:

• measuring range: 0.00-14.00 pH / 0.00 - 20.00 mS/cm EC / 0.00 - 10.00 ppt TDS / 0.0 - 50.0°C temp.
• resolution: 0.01 pH / 0.01 mS/cm / 0.01 ppt / 0.1°C
• accuracy: ±0.05 pH / 2% EC/TDS / ±0.5°C
• automatic temperature compensation
• calibration: automatic, 1-point for EC and 1- or 2-point for pH
• sensor: Mi60P (replaceable)
• operating environment: 0 - 50°C; max. relative humidity 100%
• battery type: 4x 1.5V; IEC LR44, A76 (included)
• battery life: approx. 100 h of use
• automatic shut-off function (auto-off): after 8 minutes of inactivity
• length/diameter dimensions: 20 cm / ⌀ 3.8 cm
• weight: 99 g
• instrument warranty: 2 years
• sensor warranty: 6 months

The MW804 MAX tester includes both a pH and an EC electrode. Both of them require maintenance.
All pH sensors have a limited lifespan and their response time becomes longer over time. EC sensors are more robust, but they too can be affected by the buildup of nutrient residues. So, do not forget to order Milwaukee electrode storage and cleaning solutions MA9015 and MA9016! They will help extend the service life of your instrument!

Here are our top five tips.

1. Always store it with the cap filled with buffer or MA9015 storage solution, and not water.
2. Clean your probe regularly by soaking it in MA9016 cleaning solution.
3. Calibrate after cleaning and/or storage before testing to correct changes in the pH and EC sensor.
4. Stir the nutrient solution gently for a faster result.
5. To minimise buildup, always rinse the probe with fresh tap water after every use!

Milwaukee EC40 EC/TDS Nutrient Meter measures electrical conductivity (EC) and total dissolved solids (TDS) in nutrient solutions used in hydroponics, horticulture or agriculture. With this device, you will always know the exact nutrient levels your plants receive, ensuring healthy growth and zero product waste. Measures electrical conductivity (EC) and

• total dissolved solids (TDS) with automatic temperature compensation Ideal for hydroponic use: provides readings on
• the EC, CF, ppm700 and ppm500 scales Measuring range: 0.2–4 mS/cm / 2–40 CF /
• 140–2800 ppm (0.7 scale) / 100–2000 ppm (0.5 scale) Measurement accuracy (EC): ±4% at 25°C Units displayed
• directly in mS/cm/CF/PPM (no conversions
• required) Factory calibrated; continuous calibration is not required
• Automatic on/off functions: auto-off / auto-on Blue
• LED indicators Battery level indicators Instructions for
• use: here*!
• When growing hydroponically, it

is essential to

know the exact concentration of the nutrient solution before giving it to your plants. If the measured conductivity readings are low, your plants may not receive enough nutrients and may develop mineral deficiencies. Conversely, if readings are too high, plants can suffer nutrient burn. To take a measurement, simply place the probe in the solution and the reading will appear on the blue LED display.

Key features:

• Measures electrical conductivity (EC) and total dissolved solids (TDS) with automatic temperature compensation Measuring range:
• 0.2–4 mS/cm / 2–40 CF / 140–2800 ppm (0.7 scale) / 100–2000 ppm (0.5 scale) Units displayed directly in
• mS/cm/CF/PPM (no conversions required) Factory calibrated; continuous calibration
• is not required Blue LED indicators
• Battery level
• indicators Automatic on/off functions:
• auto-off / auto-on Battery life: up to 3
• years (with approx. 10 measurements per day) Batteries: 3x
• 1.5V AA (included) Length/diameter:
• 42 cm / ⌀ 3 cm Weight:
• 255 g
• warranty: 2 years

Maintenance:

• EC / TDS electrodes can develop nutrient buildup over time. To minimise buildup, always rinse the probe in fresh tap water after each use!

With the Milwaukee MA871 Digital Refractometer (0 - 85% Brix), measuring sugar content is now child's play!

The Milwaukee MA871 Digital Refractometer features automatic temperature compensation and a range of 0 - 85% BRIX and +/- 0.2% accuracy. It is easy to use, with simple two-button operation and a response time of under 2 seconds. Maintenance is straightforward thanks to the easy-to-clean, sealed crystal-glass prism and stainless-steel sample well.

• Ideal for winemakers, brewers, fruit and vegetable growers, maple syrup producers and food manufacturers.
• Fast and accurate results with a digital dual-level LCD display.
• Easy measurement with just 2-3 drops of sample and results in under 2 seconds.
• Easy one-point calibration using distilled or deionised water.
• Easy-to-clean stainless-steel sample well with a unit rated IP65 as "dustproof" and protected against water jets.

Instructions for use here.

Specifications:

• measurement range: 0 - 85% BRIX, 0 - 80°C
• resolution: 0.1% BRIX, 0.1°C
• accuracy: ±0.2% BRIX, ±0.3°C
• light source: yellow LED
• measurement time: approximately 1.5 seconds
• min. sample volume: 100 µL or 2 drops (fully cover the prism)
• sample cell: stainless-steel ring and flint glass prism
• temp. compensation: automatic, between 10 and 40°C
• housing protection rating: IP65
• housing material: ABS
• battery type: 1 x 9V AA (included)
• battery life: 5000 hrs of readings with automatic shut-off after 3 minutes of inactivity
• instrument dimensions:192 x 102 x 67mm
• instrument weight: 0.42 kg
• package dimensions: 268 x 122 x 118mm
• warranty: 2 years

Bluelab KCl is a specialised storage liquid for pH probes and electrodes that protects the sensitive tip from drying out. It ensures proper probe hydration and maintains measurement accuracy. Compatible with:

• Bluelab pH pen
• Bluelab Soil pH pen
• Bluelab pH Meter
• Bluelab pH Probe

Product type: storage solution for pH probes and electrodes.

Composition: potassium chloride (KCl) — the same type of solution as the internal electrolyte of pH probes, preventing damage and drying out

Volume: 18 ml (sachet)

Function: keeps the pH probe hydrated, extending its life and ensuring fast response when measuring

Compatibility: suitable for all Bluelab pH meters, probes and pens, as well as other compatible devices.

Advantages:

• prevents the electrode from drying out
• extends the life of the pH probe
• maintains accurate and stable measurements
• convenient single-use format

Recommendations for use:

Probe storage: add a few drops to the pH probe cap and close it to keep the tip continuously moist.

Restoration: if the probe has dried out, soak it in KCl solution for 24 hours before using it again.

Maintenance: use monthly to maintain measurement accuracy and response speed.

Product storage: store in a cool, dry place away from direct light.

Bluelab pH Probe is a replacement pH probe suitable for use with Bluelab pH Meter, Bluelab Combo Meter and Bluelab Guardian Monitor.

• completely waterproof
• 2-metre cable for measurements in hard-to-reach places
• fast and accurate measurements
• polycarbonate housing for long-lasting use
• effective in solutions with EC of 0.2 and higher
• warranty: 6 months

Use in conjunction with the included storage cap with KCl to extend probe life!

Product technical specifications here!

The Bluelab pH Probe is a replaceable pH probe (electrode) suitable for use with the Bluelab Combo Meter, pH Meter and Guardian Monitor. Unfortunately, pH probes don't last forever as they age through daily use and eventually break. With good care and proper use (keeping the tip of the probe wet and cleaning it once a month) you will extend its lifespan. Bluelab pH Probe can be used by everyone from home hobbyists to professional greenhouse gardeners. Replace only the pH probe, not the entire unit!