Bluelab — Measuring Instruments > pH & EC Control > pH & EC Meters

Take quick pH and temperature measurements of your solution with the Bluelab pH pen!

• completely waterproof
• simple two-point calibration
• 1-year warranty
• automatic shut-off function to extend battery life
• 1 x AAA alkaline battery (included)
• pH measurement range: 0.0 - 14.0 
• accuracy: ± 0.1 at 25°C 

Full technical product specifications here!

The best, most convenient solution for measuring the pH and temperature of your nutrient solution! Plants obtain their nutrients from minerals, but they can receive all the minerals they need only when certain conditions are right. Think of nutrients as a lock. pH is the key. A key factor affecting nutrient uptake is whether your solution is acidic or alkaline. We measure this through pH. The Bluelab pH pen also measures the temperature of the solution, as root health is vital to a successful harvest. Temperature affects the growth rate and structure of the plant, so a solution temperature of 18-22°C is recommended. The Bluelab pH pen offers a compact, quick and convenient way to manage your crop's success and ensure maximum nutrient uptake. Together with the Bluelab Conductivity Pen, you have a convenient, accurate system for ensuring optimal plant growth and health.

• completely waterproof
• simple two-point calibration
• 1-year warranty
• automatic shut-off function to extend battery life
• 1 x AAA alkaline battery (included)
• pH measurement range: 0.0 - 14.0 
• temperature: 0 - 50°C
• accuracy: pH: ± 0.1 at 25°C
• selectable temperature units (C°/F°)
• Backlit LCD display
• built-in pH probe (non-replaceable)
• tick indicating successful calibration
• hold function for recorded measurements
• low battery indicator
• automatic shut-off function

Take quick measurements directly in your plants' soil quickly and easily with the Bluelab Soil pH pen!

Bluelab Soil pH pen is a meter for measuring pH and soil temperature in soil and other growing media. With this smart pen, you can be sure that your plants receive the right nutrients. It can also measure liquids... Convenient, isn't it?

• completely waterproof
• effective in most growing media and in water / solution
• 1-year warranty
• simple two-point calibration
• automatic shut-off function to extend battery life
• 1 x AAA alkaline battery (included)
• pH measurement range: 0.0 - 14.0
• accuracy: ± 0.1 at 25°C 

Measuring soil pH and temperature—the essentials of growing.

• All plants need a balanced diet of nutrients (food) to grow. However, plants can access nutrients only if the pH (potential hydrogen) of your growing medium falls within the correct range.
• Contrary to common belief, all growers should measure pH, whether growing in soil or solution. This is because pH plays an important role in making nutrients soluble so they can be absorbed by plants. If your medium is too alkaline or too acidic, your plants will not be able to obtain all the nutrients they need. Temperature is also important, as it can affect the structure and growth rate of your plants.
• Together with the Bluelab Conductivity Pen, you have a convenient, accurate system for ensuring optimal plant growth and health.

Product information: here*

Instructions for use: here*

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.

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

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)

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!

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.

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!

Bluelab Grower`s Toolbox is a set of instruments for measuring the pH and electrical conductivity of the nutrient solution:

• Bluelab pH pen
• Bluelab EC pen
• 1-year warranty

Product technical specifications here!

The key parameters for your plants' growth – at a glance, anywhere and anytime!

The Bluelab Guardian Wi-Fi Monitor keeps you informed about the three key factors for healthy plant growth: pH, conductivity and temperature. With a quick glance at the display or your smartphone (via the Edenic by BlueLab app), you will have all the data you need to optimise your nutrient solution at every stage of plant growth!

• Connect it to the Edenic by BlueLab mobile app. Real-time monitoring, control, alerts and a complete overview right on your phone. 
• Built-in Wi-Fi (can be disabled).
• Alerts for low or high pH, temperature and conductivity values.
• Non-volatile memory (settings are retained in the event of a power loss)
• Plant-friendly green backlit display with adjustable brightness.
• 2-metre cables for the measurement probes.
• 110 - 240 VAC (mains power supply).
• Included Bluelab pH Probe replaceable probe.
• 2-year warranty on the device.
• 6-month warranty on the Bluelab pH Probe probe.
• Does not require calibration of the conductivity/temperature probe (factory calibrated)

Measurement range:

• pH: 0.0 - 14.0
• temperature: °C / °F 0–50 / 32–122
• EC / CF / ppm 500 (TDS) / ppm 700: 0.0 - 5.0 / 0 -50 / 0 - 2500 / 0 - 3500

Measurement accuracy (at 25°C):

• pH: ± 0.1 
• temperature: ± 1 / ± 2
• EC / CF / ppm 500 (TDS) / ppm 700: ± 0.1 / ± 1.0 / ± 50 / ± 70

Package contents:

• 1x Bluelab Guardian Monitor Wi-Fi with conductivity/temperature probe
• 1x Bluelab pH probe
• 1x Bluelab pH probe holder with suction cup
• 4x plug adapters (North America, Europe, the United Kingdom and Australia/New Zealand)
• 4x mounting screws
• 2x cable ties
• 1x Bluelab pH 7.0 20 ml single-use calibration solution
• 1x Bluelab pH 4.0 20 ml single-use calibration solution
• 1x Bluelab KCl 20 ml storage solution

Bluelab PeriPod M3 enables automatic maintenance of ideal pH and nutrient levels in your reservoir!

• 1x 120ml/min peristaltic pump for dosing solutions for adjusting pH
• 2x 120ml/min peristaltic pumps for dosing nutrients
• robust housing and wall-mounting capability
• individual pump priming and calibration
• replaceable peristaltic pumps and tubing
• 4 m alkali-resistant tubing for dosing pH adjuster
• 2x 4m tubing for dosing nutrient solution
• compatible with most modern growing systems, including recirculating and standard drain-to-waste systems
• compatible with Bluelab Pro Controller

*Please note: Only M-series pumps (M3 and M4) can be connected together. L3 can only be connected to other L3 units

Instructions in English for the use and operation of peristaltic dosing pumps here.

Instructions in English for replacing a peristaltic dosing pump here.

Instructions in English for replacing dosing tubing here.

Instructions in English for replacing a peristaltic dosing pump cartridge here.

Stop wasting your valuable time manually dosing and preparing nutrient solution! Bluelab PeriPod M3 is a simple device designed to work with Bluelab Pro Controller and together they provide your optimal solution for dosing nutrients into your reservoir. Bluelab PeriPod M3 responds to signals sent by Bluelab Pro Controller and, through its peristaltic pumps, begins dosing and pumping pH adjuster and nutrient solutions into your reservoir. Measure, control and maintain pH levels precisely.

Bluelab Multimedia pH Meter allows pH measurement directly in the root zone, regardless of the plant environment - soil, keramsite, coco, mineral wool or nutrient solution.

• hardened tip of the sensor for measurements directly in the root zone
• easy two-point calibration with 30-day active period indicator
• Backlit LCD display
• low battery indicator
• automatic shut-off function
• 2 x AAA alkaline batteries (included)
• length of probe cable: 2m.
• device warranty: 5 years
• probe warranty: 6 months

The Bluelab Multimedia pH Meter is not waterproof, but will withstand accidental water splashes. If the device is splashed, dry it as soon as possible!

Full product technical specifications here!

Precisely measures pH in the root zone, regardless of the growing medium: soil, coco coir, rockwool or nutrient solution. 

• Take more and faster measurements with the fastest Bluelab pH sensor.
• Because the Bluelab Multimedia pH Meter is portable and needs no power supply to operate, it can be used anywhere and at any time.
• Calibration is easy with a single button press and the calibration solutions Bluelab pH 7.0 Calibration Solution and Bluelab pH 4.0 Calibration Solution . The successful-calibration indicator will light up on screen and disappear after 30 days to show you it is time to calibrate again.
• The Bluelab Multimedia pH Meter can be used by everyone – from hobbyists at home to growers in professional greenhouses.
• The Bluelab Leap pH Probe  is replaceable, so you can use this device for years to come.

The Bluelab Leap pH Probe is a replacement pH measuring probe, suitable for the Bluelab Multimedia pH Meter or the Bluelab Combo Meter. The probe enables  pH measurement directly in the root zone, regardless of the growing medium – soil, clay pebbles, coco coir, rockwool  or nutrient solution.

• The probe tip is made of durable hardened glass, allowing fast measurements in any medium!
• completely waterproof 
• fast and accurate measurements
• warranty: 6 months

Use together with the included KCl storage cap to extend the life of the probe!

Operating and usage instructions here!

Measure pH directly in the root zone, regardless of the growing medium! Take more and faster measurements with the fastest Bluelab pH sensor. With good care and correct use (keeping the probe tip wet and cleaning it once a month), you will extend its service life. The Bluelab Leap pH Probe can be used by anyone – from hobbyists at home to growers in professional greenhouses. Replace only the pH probe, not the entire device!

Bluelab OnePen Replacement Probe is an original replacement probe designed for the professional Bluelab OnePen meter. It measures pH, electrical conductivity (EC) and temperature, restoring the meter's full accuracy without the need to buy a new meter. Thanks to the easy replacement system, changing the probe takes only seconds and significantly extends the service life of the Bluelab OnePen.

Bluelab OnePen Replacement Probe was developed as a replaceable measurement module for the Bluelab OnePen and is one of the greatest advantages of this professional meter. Instead of replacing the entire device when the electrode wears out, you only need to replace the probe, reducing costs and minimising waste.

The probe combines a high-quality double-junction pH electrode, titanium EC electrodes and a temperature sensor, providing exceptionally accurate and fast measurements of all key nutrient-solution parameters. Thanks to the materials used, it is resistant to aggressive environments and intensive daily use.

The housing is IP68 certified, providing excellent protection against water and dust. After installation, the probe is calibrated in the standard way using pH 7.0 and pH 4.0 buffer solutions and is ready for use.

Technical specifications

✔️ Manufacturer: Bluelab

✔️ Model: OnePen Replacement Probe

✔️ Type: Replacement probe

✔️ Compatibility: Only with Bluelab OnePen

✔️ Measured parameters:

• pH
• EC (Electrical Conductivity)
• Temperature

✔️ pH range: 0.0 – 14.0 pH

✔️ EC range: 0.0 – 10.0 EC

✔️ CF range: 0 – 100 CF

✔️ TDS (500 Scale): 0 – 5000 ppm

✔️ TDS (700 Scale): 0 – 7000 ppm

✔️ Temperature range:

0 – 50°C

32 – 122°F

✔️ Double Junction pH technology

✔️ Titanium EC electrodes

✔️ Automatic temperature compensation

✔️ Water- and dust-resistant IP68 construction

✔️ Quick and easy tool-free replacement

📦 The set includes

✔️ 1 × Bluelab OnePen Replacement Probe

✔️ 1 × Buffer solution pH 7.0 (18 ml)

✔️ 1 × Buffer solution pH 4.0 (18 ml)

✔️ 1 × KCl Storage Solution – storage solution (18 ml)

Benefits

✔️ Replace only the probe, not the entire device

✔️ Significantly extends the life of the Bluelab OnePen

✔️ Simultaneously measures pH, EC and temperature

✔️ Double-junction pH electrode for longer life

✔️ High-resistance titanium EC electrodes

✔️ High accuracy and rapid reading stabilisation

✔️ Easy replacement in seconds

✔️ IP68 protection against water and dust

✔️ Reduces maintenance costs

✔️ Genuine Bluelab replacement component

🔧 Application

Suitable for:

• Bluelab OnePen

• Hydroponic systems

• Coco coir substrate

• Soil cultivation

• Aquaponics

• Measuring nutrient solutions

• Greenhouses

• Professional horticulture

• Laboratory applications

📋 How to use

1. Unscrew the old probe from the Bluelab OnePen.
2. Install the new replacement probe.
3. Calibrate the probe with pH 7.0 and pH 4.0 buffer solutions.
4. Rinse the probe with clean water after every use.
5. Always store the electrode in the included KCl Storage Solution when the instrument is not in use.

⚠️ Important: The average service life of the probe is approximately 18 months, depending on use and maintenance. Regular cleaning, proper storage and periodic calibration can significantly extend its lifespan. The probe comes with a 6-month limited warranty.

💡 Urban Botaniks tip: If you notice slower stabilisation of readings or difficulties calibrating the Bluelab OnePen, the most common cause is a worn probe. Replacing it restores the factory measurement accuracy and is a significantly more economical solution than buying a new instrument.

Bluelab PeriPod M4 enables automated maintenance of ideal pH and nutrient levels in your reservoir.

• 1x 120 ml/min peristaltic pump for dosing pH-adjustment solutions
• 3x 120 ml/min peristaltic pumps for nutrient dosing
• robust housing and wall-mounting capability
• individual pump priming and calibration
• replaceable peristaltic pumps and tubing
• 4 m of alkali-resistant tubing for pH adjuster dosing
• 3x 4 m tubing for nutrient solution dosing
• compatible with most modern growing systems, including recirculating and standard run-to-waste systems
• compatible with Bluelab Pro Controller

*Please note: Only pumps from the M series (M3 and M4) can be connected together. L3 can be connected only with other L3 units

Instructions in English for the use and operation of peristaltic dosing pumps here.

Instructions in English for replacing a peristaltic dosing pump here.

Instructions in English for replacing dosing tubing here.

Instructions in English for replacing a peristaltic dosing pump cartridge here.

Stop wasting valuable time on manual dosing and nutrient solution preparation! Bluelab PeriPod M4 is a simple device designed to work with the Bluelab Pro Controller, together forming your optimal solution for dosing nutrients into the reservoir. Bluelab PeriPod M4 responds to signals from the Bluelab Pro Controller and, through its peristaltic pumps, starts dosing and pumping pH adjuster and nutrient solutions into your reservoir. Measure, control and maintain pH levels precisely.

Bluelab pH Controller Wi-Fi monitors and adjusts nutrient-solution pH levels for you!

• Automatic pH control and monitoring in reservoirs up to 7600l.
• Large, easy-to-read display with green backlight
• Easy-to-use menu for programming and setup
• Easy pH calibration using on-screen instructions
• Flashing alarms for low or high values
• Dosing locks to protect against overdosing
• Automatic resumption of dosing after restart in the event of a power outage
• Waterproof design with wall-mounting option
• 4m alkali-resistant pH-adjuster dosing tube
• Use with undiluted pH adjuster
• Bluelab pH Probe probe: included
• Replaceable peristaltic pump and tubing
• warranty for the unit and temperature probe: 2 years
• warranty for the Bluelab pH Probe probe: 6 months

Product technical specifications here and here!

Hands-free monitoring and dosing of solution pH levels, simply and without your intervention! We know pH levels can make the difference between a great harvest and a poor one. Constantly measuring and correcting the pH levels of nutrient solutions can take time. Our smart pH controller automatically monitors and fine-tunes pH levels for you. Set your pH parameters and let Bluelab pH Controller maintain them using pH Up or pH Down, but not both. Simply set the parameters and leave the rest to Bluelab pH Controller. So do not worry, relax...

The Bluelab Connect Stick is a USB flash drive that lets you record nutrient solution measurement data and monitor it wirelessly.

• Ability to record collected data [when used together with Bluelab Connect products (sold separately)]
• Download and install the Bluelab Connect software for FREE
• Monitor the data and its current status through Google Docs (a computer with continuous internet access is required)
• 2-year warranty

The Bluelab Connect Stick receives wireless data from Bluelab Connect Monitors, recording it in the cloud. One Bluelab Connect Stick USB flash drive can receive data from several Bluelab Connect devices. Simply plug the Bluelab Connect Stick into your computer's USB port, download and install the Bluelab Connect software for FREE, to start monitoring crop performance wirelessly. View readings from your computer or mobile device to know whether your crop needs attention. Add other Bluelab Connect devices to the software with one click.

Product technical specifications here!

The Bluelab Combo Meter is everything you need for simple, reliable crop growing!

• easy to use, clean and calibrate
• measures pH, conductivity (EC, CF, ppm700 and ppm500) and temperature (°C, °F) of the nutrient solution
• simple two-point calibration (pH)
• No calibration required for the conductivity/temperature probe (factory calibrated)!
• 2-metre cable for measurements in hard-to-reach places
• Bluelab pH Probe: included
• device warranty: 5 years
• probe warranty: 6 months
   

The Bluelab Combo Meter is not waterproof, but it will withstand accidental water splashes! If the device gets splashed, dry it as quickly as possible!

Full product technical specifications here!

The Bluelab Combo Meter is a portable pH, conductivity and temperature meter – all in one. If you are experiencing yellow leaves or slow growth, the Bluelab Combo Meter will show you whether each parameter meets your plants’ requirements. Adjustments can be made quickly to get your crop back on track. The Bluelab Combo Meter has two probes – the Bluelab pH Probe and a conductivity/temperature probe. To take measurements, simply place them in the nutrient solution and the data will appear on the screen. Because the Bluelab Combo Meter is portable and does not need mains power to operate, it can be used anywhere, at any time, to help you meet your plants’ daily nutrient needs. Calibration is easy, with a single button press and the Bluelab pH 7.0 Calibration Solution and Bluelab pH 4.0 Calibration Solution. The successful-calibration indicator lights up on the screen, then disappears after 30 days to let you know that you need to calibrate again. The Bluelab pH Probe is replaceable, so you can use this meter for years to come.

• easy to use, clean and calibrate
• ​large, easy-to-read display
• selectable temperature units (°C or °F)
• measures pH, conductivity (EC, CF, ppm700 and ppm500) and temperature (°C, °F) of the nutrient solution
• simple two-point calibration (pH)
• No calibration required for the conductivity/temperature probe (factory calibrated)!
• 2-metre cable for measurements in hard-to-reach places
• Bluelab pH Probe: included
• 2 x alkaline AAA batteries (included)
• automatic shut-off function
• device warranty: 5 years
• probe warranty: 6 months

Bluelab pH Meter is one of the best instruments on the market for measuring the pH and temperature of nutrient solution!

​

• lightweight and portable (easy to carry)
• large, easy-to-read display
• easy one-button pH calibration
• tick icon indicating successful calibration
• 2 x alkaline AAA batteries (included)
• low battery indicator
• automatic shut-off function
• Bluelab pH Probe probe: included
• probe cable length: 2m.
• instrument warranty: 5 years
• probe warranty: 6 months 

Bluelab pH Meter is not waterproof, but it will withstand accidental water splashes. If the instrument is splashed, dry it as quickly as possible!

Full product technical specifications here!

Precisely measures the pH value of the nutrient solution so you know whether any adjustments are needed. All plants need a specific pH level for maximum nutrient uptake from the solution. If you do not control pH levels, plants will not be able to absorb the elements they need for good, vigorous growth. 

• Bluelab pH Meter is the perfect portable way to accurately measure the pH value of nutrient solution, so you can add the required amount of pH- or pH+ to get growth back on track. Simply place the Bluelab pH Probe probe into the solution and the measurement value will appear on the screen.
• As the Bluelab pH Meter is portable and does not need mains power to operate, it can be used anywhere, at any time.
• Calibration is easy with a single button press and the calibration solutions Bluelab pH 7.0 Calibration Solution and Bluelab pH 4.0 Calibration Solution . The successful-calibration indicator will light up on screen and disappear after 30 days to show you it is time to calibrate again.
• Bluelab pH Meter can be used by everyone – from home enthusiasts to gardeners in professional greenhouses.
• Bluelab pH Probe probe is replaceable, so you can use this instrument for years to come.

Bluelab PeriPod L3 enables automated maintenance of ideal pH and nutrient levels in your reservoir.

• 1x 1200ml/min peristaltic pump for dosing solutions for adjusting pH
• 2x 1200ml/min peristaltic pumps for dosing nutrient solutions
• robust housing and wall-mounting capability
• individual pump priming and calibration
• replaceable peristaltic pumps and tubing
• 4m alkali-resistant tubing for pH-adjuster dosing
• 3x 4m tubing for nutrient-solution dosing
• compatible with most modern growing systems, including recirculating and standard run-to-waste systems
• compatible with Bluelab Pro Controller
  

*Please note: Only pumps from the M series (M3 and M4) can be connected together. L3 can be connected only with other L3 units

Instructions in English for the use and operation of peristaltic dosing pumps here.

Instructions in English for replacing a peristaltic dosing pump here.

Instructions in English for replacing dosing tubing here.

Instructions in English for replacing a peristaltic dosing pump cartridge here.

Stop wasting your valuable time manually dosing and preparing nutrient solution! Bluelab PeriPod L3 is a simple device designed to work with the Bluelab Pro Controller and together they are your optimal solution for dosing nutrients into your reservoir. Bluelab PeriPod L3 responds to signals sent by the Bluelab Pro Controller and, through its peristaltic pumps, begins dosing and pumping pH adjuster and nutrient solutions into your reservoir. Precisely measure, control and maintain pH levels.

24/7 monitoring of pH, EC and nutrient-solution temperature in your reservoir, anywhere and anytime from your smartphone!

• Built-in Wi-Fi (with the option to disable it).
• Monitors and automates nutrient and pH dosing in reservoirs when connected to Bluelab PeriPod (M3, M4 and L3) peristaltic dosing pumps.
• View and control via your mobile phone; visit Edenic.io for more information.
• Replaceable pH probes (BNC connection), temperature and conductivity measurements.
• Safety lockouts prevent over-dosing.
• Automatic resumption of dosing after a power failure.
• Multi-part nutrient dosing is possible with multiple dosing pumps (M3, M4 and L3)
• Controls pH upward (alkali) or downward (acid).
• Visual high and low alarms to warn you when parameters are out of range.
• The dosing routine allows efficient mixing before the next dose.
• 2 m cable lengths for optimal positioning and viewing.
• can be connected to up to 12 pumps (3 x Bluelab M4 dosing pumps)
• recommended for reservoirs up to: 76 600 l

Product technical specifications here!

Full control of pH, conductivity and nutrient-solution temperature in the reservoir, all in one place! When connected to a dosing system, the Bluelab Pro Controller manages the pH, conductivity and nutrient-solution temperature levels in the reservoir. As your plants feed, pH and nutrients are automatically adjusted to the desired range. Monitor, record data and control your system in real time, responding immediately to customised settings and system alerts directly from your computer.

Bluelab pH PenPlus is the latest generation of professional pH meter from Bluelab, created for growers who require maximum accuracy, reliability and a long instrument life. Its main innovation is the replaceable pH/temperature probe, which lets you replace only the probe when it wears out, without replacing the entire instrument. This reduces costs, minimises downtime and ensures consistently accurate measurements.

Bluelab pH PenPlus is developed specifically for professional use in hydroponics, coco substrates, soil growing, aquaponics and all systems where precise pH control is crucial. Thanks to its high-quality double-junction pH probe, the device delivers stable, fast and reliable measurements even with frequent use in nutrient solutions.

The greatest advantage of the PenPlus model is the replaceable pH probe (Bluelab pH ProbePlus). With standard pH meters, once the electrode wears out, the entire instrument has to be replaced. With PenPlus you only need to replace the probe through the practical screw mechanism, which significantly extends instrument life and reduces running costs.

The instrument measures both pH and temperature, has a bright backlit LCD display, a Hold function to retain readings, automatic shut-off to save battery power and a calibration reminder every 30 days. It is certified to IP68, meaning it is fully protected against dust and water and suitable for operation in demanding conditions.

Bluelab is one of the most recognisable manufacturers of measuring instruments for professional horticulture, and the PenPlus is designed and manufactured in New Zealand with a focus on long-term reliability and easy maintenance.

Technical specifications

✔️ Manufacturer: Bluelab

✔️ Model: pH PenPlus

✔️ Type: Portable pH and temperature meter

✔️ pH measurement range: 0.0 – 14.0 pH

✔️ Resolution: 0.1 pH

✔️ Accuracy: ±0.1 pH

✔️ Temperature range: 0 – 50°C

✔️ Temperature units: °C / °F

✔️ Automatic temperature compensation (ATC)

✔️ Double-junction pH probe

✔️ Replaceable pH/temperature probe

✔️ Backlit LCD display

✔️ Hold

✔️ Two-point calibration

✔️ Calibration reminder every 30 days

✔️ Automatic shut-off

✔️ Water- and dust-resistant housing IP68

✔️ Power supply: 1 × AAA alkaline battery

✔️ Compatible with Bluelab pH ProbePlus

📦 The kit includes

✔️ Bluelab pH PenPlus

✔️ Replaceable pH/temperature probe

✔️ Sachet of pH 7.0 calibration solution

✔️ Sachet of pH 4.0 calibration solution

✔️ Sachet of KCl storage solution

✔️ AAA battery

✔️ User manual

Benefits

✔️ Replaceable probe – you replace only the electrode, not the entire instrument

✔️ Exceptionally accurate and stable measurements

✔️ Measures pH and temperature simultaneously

✔️ Double-junction probe for longer service life

✔️ Waterproof and dustproof housing (IP68)

✔️ Easy two-point calibration

✔️ Reminder for the next calibration

✔️ Compact and convenient for daily work

✔️ Suitable for both professional growers and hobbyists

✔️ Reduces maintenance costs thanks to the replaceable probe

Application

Suitable for:

• Hydroponic systems

• Soil growing

• Coco substrates

• Aquaponics

• Greenhouses

• Measuring nutrient solutions

• pH control during irrigation

• Laboratory applications

• Aquariums

• Professional and hobby growing

📋 Instructions for use

1. Remove the protective cap and rinse the probe with clean water.
2. Immerse the probe in the solution to be measured.
3. Wait for the readings to stabilise.
4. If necessary, use the Hold function to retain the value.
5. After use, rinse the probe and store it with KCl solution in the protective cap.
6. Calibrate the instrument regularly with pH 7.0 and pH 4.0 buffer solutions for maximum accuracy.

💡 Tip from Urban Botaniks: To maximise the life of the pH probe, never store it in distilled water. Use specialised KCl Storage Solution and calibrate at least once a month or always after a prolonged period of non-use.