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

PH600 is a digital pen for measuring the pH of liquids from Milwaukee's economy range of measuring instruments. It is ideally suited to enthusiasts of hydroponics and aquariums.

• Fast and accurate results with a digital LCD display.
• Easy measurement - simply place the probe in the water, stir gently and wait for the reading to stabilise.
• Easy one-point calibration with an easy-to-use trimmer located on the back of the pH tester for protection from accidental splashes.
• Cap for protecting the pH sensor, keeping it wet when stored upright.
• Low power consumption for extended battery life (batteries included).

Instructions for use here*. Calibration instruction video here*.

The set includes:

• 1x Milwaukee PH600 Digital pH Pen - digital pH measurement pen
• 1x calibration screwdriver

Technical specifications:

• measurement range: 0.0 - 14.00 pH
• resolution: 0.1 pH
• measurement accuracy: 0.1 pH
• calibration: manual, single-point
• operating environment: temp. 0 - 50°C, humidity up to 95%
• batteries: 3x LR44 1.5V (included)
• battery life: up to 700 h of operation
• dimensions: 32 x 180 x 65 mm
• weight: 60 g
• device warranty: 1 year
• sensor warranty: 6 months

Proper maintenance of your pH meter will give you fast and accurate results for longer. Here are our four best tips:

1. Always store it with the cap filled with buffer or MA9015 storage solution, and not water.
2. Clean the pH sensor regularly by soaking it in MA9016 cleaning solution.
3. Calibrate after cleaning and/or storage before testing to correct changes in the pH sensor.
4. Stir the sample gently with the pen for a faster result.

Milwaukee pH51 is one of the most accurate, robust and reliable budget pH testers on the market. The easily replaceable probe provides years of worry-free use. Ideal for use in hydroponics, aquariums, gardening, pools and many other applications.

• fast and easy-to-read results with a large digital LCD display
• measurement accuracy: ±0.1 pH
• measurement range: 0.0 - 14.0 pH
• easy calibration: 1-point or 2-point
• completely waterproof (IP65)
• built-in probe: MA73600 (replaceable)

Instructions for use here*. Calibration instruction video here*.

The set includes:

• 1x calibration solution pH 7.01 - 20ml
• 1x calibration solution pH 4.01 - 20ml
• 1x calibration screwdriver

Key features:

• measurement range: 0.0 - 14.0 pH
• resolution: 0.1 pH
• measurement accuracy: ± 0.1 pH
• easy manual 1-point or 2-point calibration.
• built-in probe: MA73600 (replaceable)
• operating conditions: 0 - 50°C; max. RH (relative humidity) 100%
• batteries: 3x 1.5V, IEC LR44, A76 (included)
• battery life: over 1500 h of continuous use
• batteries: included in the package
• dimensions: 16.5 cm , ⌀ 3 cm
• weight: 99 g
• instrument warranty: 1 year
• probe warranty: 6 months

Calibration:

1. Unscrew the battery-compartment cap at the top of the meter and follow this two-point calibration procedure:
2. Immerse the electrode in pH 7.01 calibration buffer solution.
3. Allow the reading to stabilise, then use a small screwdriver to turn the “7” calibration trimmer in the battery compartment until the display shows “7.0”.
4. Rinse the electrode with tap water and immerse it in pH 4.01 calibration buffer solution.
5. Allow the reading to stabilise, then use a small screwdriver to turn the “4” calibration trimmer until the display shows “4.0”.

Proper probe maintenance will give you fast, accurate results for longer. Here are our top four 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. Gently stir the probe in the sample for a faster result.

Milwaukee Waterproof pH55 PRO pH/Temp is one of the best-selling pH testers on the market. Accurate measurements, affordability, robustness and reliability make it one of the preferred instruments among hobbyists and professional growers alike. With a large digital LCD display, an easily replaceable probe and an extended pH measuring range, ph55 PRO meets almost every application. Ideal for use in aquariums, hydroponics, gardening, swimming pools, beer brewing and many other applications.

• accuracy to ±0.1 pH and extended measuring range from -2.0 to 16.0 pH
• lightweight and portable
• easy to use
• automatic temperature compensation (ATC)
• easy automatic calibration at one or two points
• includes 2x solutions for calibration (M10007 and M10004)
• completely waterproof (IP65)
• built-in probe: Mi56P (replaceable)

Milwaukee EC meter EC60

Professional EC meter

Professional waterproof EC meter with temperature display, automatic temperature compensation and automatic calibration.

Displays EC or PPM, plus solution temperature.

"HOLD" function for storing the measured value.

Replaceable sensor.

Milwaukee EC meter EC60

• Range: 0-20 mS/cm; 0-10 ppt; 0.0 - 60.0°C
• Resolution: 0.01 mS/cm; 0.01 ppt; 0.1°C
• Accuracy: ±2%; ±0.5°C
• Calibration: automatic, one point
• Automatic temperature compensation with β=0.0 to 2.4%/°C
• Operating conditions: temp. 0-50°C, humidity up to 100%
• Batteries: 4 pcs. LR44 1,5V / 100 hours of operation
• Automatic shut-off: after 8 min.
• Dimensions: 200 x 38 mm / 100 g
• Manufacturer's warranty - 2 years for the device, 6 months for the sensor. Does not apply to mechanical damage and improper use!

Milwaukee C66 is one of the most reliable budget testers for measuring conductivity (EC) and solution temperature on the market. Designed for growers who want to ensure their plants receive the right amount of nutrients. By maintaining EC levels within the target range, you will achieve better results.

• measures conductivity (EC) and temperature with automatic temperature compensation (ATC)
• measurement range: 0.0 - 10.00 mS/cm
• measurement accuracy: ±2%
• measurement units mS/cm, which can easily be converted to ppm (parts per million)
• factory calibrated with the option to recalibrate (if necessary)
• completely waterproof (IP65)
• built-in electrode: MA73076 (replaceable)

Instructions for use here*. Calibration instruction video here*.

The set includes:

• 1x 1413 µS/cm calibration solution - 20 ml
• 1x calibration screwdriver

Technical specifications:

• measurement range: 0.00 - 10.00 mS/cm
• resolution: 0.01 mS/cm
• measurement accuracy: ±2%
• calibration: manual, 1-point
• operating environment: 0 - 50°C; max. RH (relative humidity) 100%
• batteries: 3x 1.5V, IEC LR44, A76 (included)
• battery life: over 250 hours
• batteries: included in the set
• dimensions: 16.5 cm , ⌀ 3 cm
• weight: 99 g
• instrument warranty: 1 year
• electrode warranty: 6 months

Calibration:

1. Immerse the measuring instrument in 1413 µS/cm calibration solution.
2. Unscrew the battery-compartment cap on the top of the measuring instrument.
3. Allow the reading to stabilise, then use a small screwdriver to turn the calibration trimmer inside the battery compartment until the display shows “1.41”.
4. Fit the battery-compartment cap.
5. Calibration is complete.

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

EC to TDS conversion: Milwaukee EC Pen, like all conductivity meters, measures electrically charged ions in a solution and provides an absolute measure of conductivity. EC is often converted to TDS in parts per million (ppm). Different scales include the 500 scale, 650 scale and 700 scale. However, true PPM can only be determined through chemical analysis. Your mS/cm reading can be approximately converted to TDS (ppm), as shown in the examples below.

1. 2.00 mS/cm = 2000 µS/cm = 1000 ppm on the .50 factor scale
2. 2.00 mS/cm = 2000 µS/cm = 1400 ppm on the 442 scale or .70 factor scale

With the Milwaukee Pocket Mi6000 set, you can monitor the temperature, pH and electrical conductivity (EC) levels of your plants' nutrient solution. The set includes:

• 1x digital pH tester pen Milwaukee pH600
• 1x digital EC tester pen Milwaukee CD611
• 1x hard plastic storage case

🔹  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.

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.

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.

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!

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

Milwaukee EC45 PRO is a professional instrument for rapid measurement of electrical conductivity (EC), total dissolved solids (TDS) and Conductivity Factor (CF) in nutrient solutions. Designed specifically for hydroponics, greenhouses, fertigation systems and professional horticulture, it provides instant measurements without calibration. Its IP67 waterproof housing floats on water and is suitable for daily use in reservoirs and mixing tanks.

Milwaukee EC45 PRO is designed for growers who want to monitor nutrient-solution concentration quickly and reliably. Maintaining the correct EC value is essential for optimal nutrient uptake and preventing plant deficiency or overfeeding. EC45 PRO measures EC, TDS (500 and 700 ppm scale) and CF, allowing use of the grower's preferred measurement system.

The instrument is exceptionally easy to use – simply immerse the measuring section in the solution. It has no buttons, switches on automatically when immersed and, once the reading stabilises, switches itself off after about 30 seconds, greatly extending battery life. The bright 24-LED indicator shows the measured value, battery status and warnings for values outside the measurement range.

Unlike standard EC testers, EC45 PRO is factory calibrated and does not require periodic user calibration. The graphite electrodes resist build-up, and the robust housing allows the instrument to be used as a stirring rod when preparing nutrient solutions. Thanks to automatic temperature compensation, readings remain accurate between 5°C and 50°C.

Technical specifications

✔️ Manufacturer: Milwaukee Instruments

✔️ Model: EC45 PRO

✔️ Type: EC / TDS / CF meter

Measurement ranges

✔️ EC: 0.2 – 6.0 mS/cm

✔️ TDS (500): 100 – 3000 ppm

✔️ TDS (700): 140 – 4200 ppm

✔️ CF: 2 – 60 CF

Resolution

✔️ EC: 0.1 mS/cm (up to 4.0 mS/cm)

✔️ EC: 0.25 mS/cm (4.0 – 6.0 mS/cm)

✔️ TDS 500: 50 ppm / 125 ppm

✔️ TDS 700: 70 ppm / 175 ppm

✔️ CF: 1 CF / 2.25 CF

✔️ Accuracy: ±4% of reading ±1 digit

✔️ Automatic temperature compensation: 5 – 50°C

✔️ Factory calibrated

✔️ Graphite electrode

✔️ LED display with 24 blue LEDs

✔️ Automatic switch-on

✔️ Automatic shut-off

✔️ Power supply: 3 × AA alkaline batteries

✔️ Battery life: up to 3 years (about 10 measurements per day)

✔️ Protection: IP67

✔️ Floating housing

✔️ Dimensions: 444 × Ø30 mm

✔️ Weight: 265 g (with batteries)

📦 The kit includes

✔️ 1 × Milwaukee EC45 PRO Nutrient Stick Meter

✔️ 3 × AA alkaline batteries

✔️ Protective cap

✔️ User manual.

Benefits

✔️ Measures EC, TDS and CF with one instrument

✔️ No calibration required

✔️ Automatic power on and off

✔️ Waterproof housing IP67

✔️ Floats if dropped in water

✔️ Highly durable graphite electrodes

✔️ Automatic temperature compensation

✔️ Clear LED indication

✔️ Suitable for everyday professional use

✔️ Works as a measuring instrument and stirring rod at the same time.

📋 Instructions for use

1. Remove the protective cap.
2. Immerse the electrode in the nutrient solution.
3. Gently stir the solution with the instrument for an even measurement.
4. Wait for the LED indication to stabilize.
5. When finished, rinse the electrode with clean water.
6. When necessary, clean the electrode periodically according to the manufacturer's instructions.

⚠️ Important: Although the EC45 PRO does not require calibration, the manufacturer recommends regular cleaning of the graphite electrodes to prevent salt and nutrient residue buildup, which can affect measurement accuracy.

💡 Urban Botaniks tip: Check the EC value daily, especially when growing hydroponically. This will help you maintain the optimal nutrient solution concentration, avoid salt buildup, and ensure maximum plant growth and yield.

MA73600 is a replacement pH probe for Milwaukee pH51 and Milwaukee pH54 testers (sold separately).

• measures: pH and temperature of solutions
• easy installation
• measurement range: 0.0 - 14.0 pH
• resolution: 0.1 pH
• measurement accuracy: ±0.1 pH
• warranty: 6 months

Key features:

• Compatible with: Milwaukee pH51 and Milwaukee pH54 testers.
• Easy installation: slide the probe into the tester and screw it in for secure attachment.
• Reliability: ensures accuracy and long-lasting use.
• Convenience: designed for quick replacement, without the need for special tools.

Proper probe maintenance will give you fast, accurate results for longer. Here are our top four 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. Gently stir the probe in the sample for a faster result.

Milwaukee MI56P is a replacement pH probe for Milwaukee pH55 and Milwaukee pH56 (sold separately).

• measures: pH and temperature of solutions
• easy installation
• measurement range: 0.0 - 14.0 pH
• resolution: 0.1 pH
• measurement accuracy: ±0.1 pH
• warranty: 6 months

Key features:

• Compatible with: Milwaukee pH55 and Milwaukee pH56 testers.
• Easy installation: slide the probe into the tester and screw it in for secure attachment.
• Reliability: guarantees accuracy and long-lasting use.
• Convenience: designed for quick replacement, without the need for special tools.

Proper probe maintenance will give you fast, accurate results for longer. Here are our top four 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. Gently stir the probe in the sample for a faster result.

Automate control of your solution's pH with the Milwaukee MC720 PRO pH Controller and Pump Kit. The kit includes:

• 1x controller with pH probe Milwaukee MC122 PRO pH Controller
• 1x dosing pump Milwaukee MP810 1.5l/h (25ml/min)

Milwaukee MA887 is a high-quality digital refractometer, specially designed for precise measurement of salinity in seawater and artificial seawater. Combining precision, speed and ease of use, this instrument is ideal for aquarists, aquaculture professionals and laboratories.

Key features:

• Three measurement scales:

  • PSU (Practical Salinity Units): 0 to 50

  • ppt (parts per thousand): 0 to 150

  • S.G. (Specific Gravity): 1.000 to 1.114 (20/20)

• Temperature range: 0 to 80°C (32 to 176°F)

• Resolution:

  • 1 PSU / 1 ppt / 0.001 S.G.

  • 0.1°C / 0.1°F

• Accuracy:

  • ±2 PSU / ±2 ppt / ±0.002 S.G.

  • ±0.3°C / ±0.5°F

• Measurement time: approximately 1.5 seconds

• Minimum sample volume: 100 µL

• Automatic temperature compensation (ATC): between 10 and 40°C

• Display: two-level LCD screen

• Light source: yellow LED

• Housing material: ABS plastic

• Power supply: 1 x 9V battery (included)

• Battery life: up to 5000 measurements

• Automatic shut-off: after 3 minutes of inactivity

• Protection rating: IP65 – protection against dust and water jets

• Dimensions: 192 x 102 x 67 mm

• Weight: 0.42 kg

• Fast and accurate results: you get measurements in less than 2 seconds

• Easy to use: only a small sample drop is required

• Automatic calibration: with distilled or deionised water

• Durable design: easy to clean, with a stainless-steel ring and glass prism

• Portability: compact and lightweight, ideal for field and laboratory conditions​

Applications:

• Aquariums – maintaining optimal conditions in marine aquariums

• Aquaculture – monitoring salinity in fish farms

• Laboratories – analysis of seawater and artificial seawater

• Educational institutions – training and demonstrations