Measure pH, conductivity and temperature on the go. Bluelab Combo Meter Plus provides ultimate convenience by taking care of the three main factors of nutrient absorption simultaneously.

Not only that, but this multi-parameter meter and its probes feature a brilliantly simple design. The Bluelab Leap pH probe is easy to use, clean and calibrate; when the time comes, it's also easy to replace. The Leap pH probe allows you to read the pH directly in the root zone. Similarly, the Bluelab Conductivity Probe has straightforward functionality that does not require additional calibration.

• Measures pH, conductivity (EC, CF, ppm 500 and ppm 700) and temperature (°C, °F)
• Easy to use, clean and calibrate
• Display for easy visualization of each measurement
• The Leap pH probe is safely stored and ready to measure right away
• Includes a conductivity probe without calibration
• 2-meter cable for measuring even in hard-to-reach places
• Automatic temperature compensation for accurate readings everywhere
• Customize the scales to your preference - conductivity in EC, CF, PPM 500 (TDS) or PPM 700; temperature in °C or °F
• Low battery indicator. Automatic shut-off function

The pH level of soils, substrates and nutrient solutions greatly affects crop performance.

Bluelab Multimedia performs quick and accurate pH measurements in the nutrient solution and the root zone. Combine the Bluelab® Multimedia pH Meter and Bluelab® LeapTM pH Probe to make quick and accurate measurements of nutrient solution, soil, coir, mineral wool, mixes and many other types of growing media.

Calibration is easy, with one button on the meter and fresh Bluelab® calibration solutions! A successful calibration indicator is displayed on the screen and after 30 days it will disappear to indicate when recalibration is required.

• Measure more times with faster sensor response and direct measurements in substrates
• Suitable for many types of growing environments
• Durable probe tip for direct insertion into the root zone
• Simple calibration process, with two points and 30-day calibration indicator
• Backlit LCD display, low battery indicator, auto shut-off function
• 2 x AAA alkaline batteries included

Instant root zone moisture, conductivity (EC) and temperature measurements with a single click 

• Measure moisture, conductivity (EC) and temperature directly in the root zone in one click 
• Connects to the Bluelab Pulse App to view, analyze and store all your measurement data. 
• Robust 8”/200 mm long-format stainless steel probes provide deeper insight 
• Use the built-in depth gauge to get consistent measurements with every reading 
• Works in soil, coco-coir, nutrient solution and other media*. 

*Does not work in media with large voids (Perlite), or media which can be permanently distorted (Rockwool). 

BlueLab Guardian Monitor

The Bluelab Guardian Monitor is a continuous indicator of the current EC, pH and temperature levels of your nutrient solution, allowing you to optimize these parameters as your plants progress through each growing phase.

Features:

• "Plant Safe" green LED display
• Visual alarm for high and low settings
• Large, easy-to-read displays
• Greater tolerance to RF/electronic interference is provided
• No conductivity or temperature calibration required
• Waterproof design
• Selectable conductivity and temperature units
• International power supply
• Easy pH calibration at the push of a button
• Adjustable display brightness
• Interchangeable dual compound pH probe
• Settings are saved in case of power loss (non-volatile memory)

How to set up/mount and calibrate, see below in description

Measure pH, conductivity and temperature on the go. The Bluelab Combo Meter provides ultimate convenience by taking care of the three main factors of nutrient absorption simultaneously.

Not only that, but this multi-parameter meter and its probes feature a brilliantly simple design. The Bluelab pH probe is easy to use, clean and calibrate; when the time comes, it's also easy to replace. ( spare probe see here )

Features:

• Measures pH, conductivity (EC, CF, ppm 500 and ppm 700) and temperature (°C, °F)
• Lightweight and portable
• Interchangeable dual compound pH probe
• Large and easy to read display
• Overrange or underrange indicators
• Easy pH calibration at the push of a button
• Low battery indicator.
• Automatic shut-off function
• Indicator of successful pH calibration
• 2x AAA alkaline batteries included
• No calibration required for conductivity and temperature
• 2m cable for measuring hard-to-reach places

Accurate direct pH measurements in any substrate in seconds

• Reinforced tip for fast, direct measurement into substrates
• Effective in soil, coir mixes, mineral wool, potting mixes and mortar
• Dual-junction probe reduces reference contamination, extending longevity
• Fast sensor response for quick and accurate measurements
• Suitable for use with Bluelab Combo Meter, Bluelab Combo Meter Plus and Bluelab Multimedia pH Meter
• The BNC connector is coated to prevent corrosion

Our pH Test indicator is perfect for easy testing.

It covers a wide range, going from 4.0 to 8.5. Simply fill the test-tube halfway with nutrient solution, add 2 - 3 drops of pH Test Indicator, shake and observe the resulting color. Compare with our color chart to check your pH level. Very reliable, simple to use and cheap, the pH Test Kit advantageously replaces the expensive pH meters. Good for at least 500 tests

Our pH Test indicator is perfect for easy testing.

It covers a wide range, going from 4.0 to 8.5. Simply fill the test-tube halfway with nutrient solution, add 2 - 3 drops of pH Test Indicator, shake and observe the resulting color. Compare with our color chart to check your pH level. Very reliable, simple to use and cheap, the pH Test Kit advantageously replaces the expensive pH meters. Good for at least 1000 tests

Fertometer is an EC-meter that measures the level of electrical conductivity in the soil, thereby measuring the amount of salts in the substrate.

It is usually difficult to judge whether plants need to be fertilized . With this wonderful device, you can easily avoid mistakes in this direction. Fertometer works on the same principle as the plant. Like the roots of a plant , it absorbs nutrients from the soil.

By measuring the amount of nutrients taken up, it can be determined whether there are enough nutrients left in the substrate. These resorbable nutrients are called ions and consist mainly of nitrogen, the main nutrient for plants during the growing season.

pH 600 Specifications

- Range 0.0 - 14.0

- pH Resolution 0.1

- pH Accuracy ± 0.1 pH

- Calibration 1 Point (7.0) - Manual

- Environment 32 - 122F

- Display LED

- Battery Life 700 hours of use

- Battery Type 1.5v Button - 3 Included

Milwaukee's economical testers are easy-to-use and low cost instruments to measure quick and reliable pH, EC or TDS values.

Measuring electrical conductivity is the best way of checking the amount of salt or dissolved solids (TDS) in water. Milwaukee provides you with a range of pocket testers that will allow you to measure from very low to very high conductivity solutions. All EC/TDS testers compensate for the temperature variance automatically.

The CD611 is a Conductivity tester specifically designed for water analysis. The calibration procedure is very simple and fast. This tester has automatic temperature compensation, 100 µS/cm resolution and a range of 0 to 20000 µS/cm. CD611 is supplied complete with protective cap, calibration screwdriver, batteries and instructions.

This meter works very accurate and has a micro processor and automatic temperature compensation.

This is the right choice for a low price if you want to grow like an expert.

Technical Data:

* 250 life hours of the batteries

* Batteries included

* Accuracy: +- 0.1 pH

* Increments: 0.1 pH

* Capacity: -2.0 pH up to +16 pH

This meter works very accurate and has a micro processor and automatic temperature compensation.

Adwa AD12 is the most advanced microprocessor based IP67 Waterproof pH/Temp pocket testers in the market.

​ADWA AD32 - Waterproof EC Tester

• LCD display
• Automatic temperature compensation
• Automatic shutdown after 8 minutes
• Automatic one point calibration
• Including. 4 x 1.5V batteries and protective cover
• Battery life: ± 100 hours
• Waterproof
• Dimensions: 175.5 x 39 x 23 mm
• Package dimensions: 230 x 60 x 68 mm
• Weight: 100 grams
• Range: 0:00 to 20:00 MS / cm, 0.00 - 10:00 PPT, 0.0 ° C - 60.0 ° C
• Resolution: + / - 2% FS (EC / TDS), + / -0.5 ° C
• Accuracy: 0.01 MS / PPT and 0.1 °C

Тhese tools are widely used.

With an IP65 waterproof housing and replaceable probe, the tester is suitable for many applications, such as a measuring instrument from wastewater treatment to agriculture. The modular design allows easy replacement of probe and battery.

PH54 is a waterproof pH tester with 2 points for manual calibration, ± 0.1 pH accuracy and a range from 0.0 to 14.00 pH.

Specifications:

• Measuring range: 0.0 - 14 pH
• Resolution: 0.1 pH
• Accuracy: + -0.1 pH
• Environment: 0 to 50 ° C; max. RH 100%
• Calibration: manually at 2 points using trimmers
• Electrode: MA73600 (replaceable)
• Power supply: 3x 1.5V (included)
• Battery life:> 1500 hours of continuous use
• Dimensions: 165 x 30 x 30 mm

Calibration:

- Immerse the switched off tester in a glass of tap water

- Move it while it is still switched off in buffer solution 7.0

- Unscrew the cap and use the supplied screwdriver to set the display to 7.0

- Dip the tester briefly in the glass of tap water and shake gently

- Immediately move the tester to buffer solution 4.0

- Use the supplied screwdriver to set the display to 4.0

- your tester is calibrated!

Milwaukee C65 / C66 is a waterproof EC tester, specially designed for hydroponics and agricultural markets, with automatic temperature compensation and manual calibration with 1 point.

The EC tester has a range of 0.00 to 10.00 mS / cm as well as an optional electrode option and is supplied in a battery pack, calibration solution (M10031) and a calibration screwdriver. The modular design allows easy replacement of the electrode and batteries.

Specifications:

• range: from 00 to 10.00 mS / cm
• resolution: 0.01 mS / cm
• accuracy: ± 2%;
• Calibration: automatic, single point
• automatic temperature compensation with β = 2% / ° C
• Operating conditions: -5 to 50 ° C / 32 to 122 ° F ;, humidity up to 100%
• batteries: 3 x 1.5V (included)
• Battery life: approx. 250 hours of continuous use
• dimensions: 165 x 30 x 30 mm

CALIBRATION:

• Frequent calibration is recommended for maximum measurement accuracy.
• Immerse the tester electrode in a glass of tap water
• Immerse the probe in a suitable calibration solution: 1413 mS / cm.
• Open the top cover of the tester and, using the screwdriver included in the kit, turn until 1.41 appears on the display.

Professional pH meter

Professional waterproof pH meter with temperature display, automatic temperature compensation, and automatic 2-point calibration. "HOLD" function to store the measured value. Interchangeable sensor/probe .

• range: pH from -2.0 to 16.00;
• temp. from -5.0 to 60.0°C
• resolution: 0.1 pH; 0.1°C
• accuracy: ±0.1pH; ±0.5°C
• calibration: automatic, one or two points (at pH 4, 7, 10 or 4, 6.86, 9.18)
• automatic temperature compensation from -5 to 60°C
• working conditions: temp. -5 to 50°C, humidity up to 100% batteries: 4 pcs. LR44 1.5V /
• 300 hours of work
• automatic shutdown: 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 operation!

Calibration:

- Immerse the unplugged tester in a cup of tap water for 2 hours

- Transfer it while it is still switched off to buffer solution 7.0

- Turn on the tester from the "ON/OFF/CAL" button

- The display will show the calibration value and the temperature in Celsius

- Press and hold the "ON/OFF/CAL" button until the display shows "CAL"

- The display will read "REC", then a value of 4.0, "OK 1" and "USE".

- Immediately transfer the tester to buffer solution 4.0

- The display will read "REC", then "OK 2" and "USE".

- your tester is calibrated!

- Suitable calibration solutions can be found here , here and here

- You can find a suitable storage solution here

Video instructions (English)

Pocket Size Waterproof Tester for EC / TDS / Temp.

Includes features such as replaceable probe , temperature measurement in °C or °F, automatic temperature compensation with adjustable ß, battery level indicator, stability indicator, auto-shutoff and auto- calibration all in a floating, waterproof housing.

Measurements are displayed at two levels on the LCD display: EU (20.00 Ms / cm) or TDS (10.00 PPT). It also displays the temperature from 0.0 to 60.0 °C (or 32.0 to 140.0 °F) on the secondary level at the same time.

INSTRUCTIONS FOR WORKING WITH THE TESTER:

• Remove the cap and turn on the tester by pressing the ON/OFF button. All usable segments of the LCD screen will be visible for about a second or as long as you hold the button.
• Immerse the probe in the solution you want to measure, select either EC or TDS mode with the SET/HOLD button.
• Gently mix the solution with the probe in a circular motion and wait for the reading to stabilize. I.e. until the hourglass symbol on the LCD screen turns off.
• The EC or TDS value is automatically temperature compensated and will be displayed on the main LCD, while T will be displayed on the secondary LCD.
• To lock the display while in measurement mode, press and hold the SET/HOLD button. The message “HOLD” will be displayed on the secondary display and locked on the LCD screen. Press any button to return to normal mode.
• To turn the tester off, press the ON/OFF button. The message “OFF” will appear on the secondary display. Release the button.
• Before each measurement, make sure that the tester is calibrated (you can know this if the inscription “CAL” lights up on the display)
• After each use of the tester, always turn it off, rinse its probe with water and store it with the cap closed.

SETTINGS:

• This mode allows you to change the winterization units for temperature C/F, conversion factor (CONV) and temperature coefficient (BETA). To enter this mode, press and hold the ON/OFF button until “CAL” on the secondary display replaced by "TEMP" then:
• To select C/F unit, press the SET/HOLD button, then press the ON/OFF button once to enter buffer settings or twice to return to normal mode.
• To change the TDS value after you have set the temperature section, press ON/OFF once to display the current value (eg 0.50 CONV). Select the desired value by pressing the SET/HOLD button, then press ON/OFF twice to return to normal mode.
• To change the temperature coefficient. After setting the TDS factor, press ON/OFF to display the current temperature coefficient value (eg 2.1 BETA). Press the SET/HOLD button to set the desired value, then press ON/OFF to to return to normal mode.

CALIBRATION:

• For maximum measurement accuracy, frequent calibration is recommended.
• From normal EC mode, press and hold the ON/OFF/CAL button until the “OFF” message on the display is replaced by the “CAL” message. Release the button.
• Immerse the probe in a suitable calibration solution: 12.88 mS/cm.
• After the value is read automatically, the LCD screen will display “OK” for about a second and the tester will return to normal, measuring mode.

There is no need to recalibrate the tester if you decide to change the measurement setting from EU to TDS.

When the calibration procedure is completed correctly, the inscription “CAL” lights up on the screen.

To reset to default settings and clear previous calibration, press the ON/OFF/CAL button after entering the calibration mode and before the calibration point is accepted. The secondary display will read “CLR” for about a second, the tester returns to its factory defaults settings and the inscription “CAL” turns off on the display automatically,

Bluelab pH pen - compact, easy and convenient to use, the best solution for measuring pH.

The Bluelab pH Pen is a durable, compact and accurate pH and temperature pen for use in nutrient solution. Use the pH pen to quickly and accurately tell if your solution is too acidic or alkaline, or too hot or cold. Designed for everyday use, the Bluelab pH Pen helps you keep your plants in the optimal pH and temperature range so your plants can thrive.

Care Tips:

Clean and calibrate your probes monthly to maintain probe accuracy.
Always store the pH probe in the storage cap with enough KCl (potassium chloride) storage solution to cover the tip of the probe. The probe will be damaged if left dry. Read more about KCl Storage Solution.
The glass tube can be easily damaged. Be careful not to hit the glass.
Do not immerse in oils, proteins, or suspended solids, which will leave a coating on the glass flask.
Never store or soak the pH probe in RO, distilled or deionized water.

The Bluelab EC pen is the latest innovation in handheld EC meters and is the ultimate solution when it comes to EC measurement.

Measure pH, conductivity and temperature on the go. The Bluelab Combo Meter provides ultimate convenience by taking care of all three fundamentals of nutrient absorption simultaneously.

Not only that, but this multi-parameter meter and its probes feature a brilliantly simple design. The Bluelab pH probe is easy to use, clean and calibrate; when the time comes, it's also easy to replace. Similarly, the Bluelab Conductivity Probe has straightforward functionality that does not require additional calibration.
 

How to use the Bluelab EC pen:

• The conductivity pen comes with a battery and is ready to use out of the box.
• The pen is factory calibrated.
• Press the power button to turn on the Bluelab Conductivity Pen.
• To turn off the pen, press and hold the power button until OFF is displayed.
• The pen will automatically turn off after 4 minutes to conserve battery power.
• Place the probe tip into your nutrient solution and wait for the reading to stabilize.
• Rinse under running tap water after use.

Bluelab soil pH pen

The Bluelab Soil pH Pen is an accurate way to measure soil pH and temperature directly in the root zone of your plants. If necessary, the soil pH pen can be used in nutrient solutions .

Simply poke a hole in the soil with the storage cap and insert the probe to get constant pH and temperature measurements.

Features:

• Selectable units for °C and °F
• Fully waterproof
• LCD display with backlight
• Read hold function
• Storage cap
• Automatic shut-off function

How to use:
**Important : You must calibrate your pH pen before first use .

• Use the storage cap to make a hole in the soil. Place as deep as the roots of your plant.
• Carefully remove the storage cap by first unscrewing the cap and gently pulling to remove the probe. The cap contains KCl solution , so be careful not to spill the liquid. The formation of a salt crust around the probe is normal.
• Turn on the pen and insert the probe into the opening. Make sure the tip of the probe is in contact with the soil at the end of the hole. The display will stabilize and give you pH and temperature readings.
• Rinse after use to remove nutrient build-up or dirt and replace cap for storage

How to calibrate:
**Calibrate after each cleaning and at least once a month.

• Turn on the pH pen.
• Calibrate to pH 7 by placing the probe tip in a pH 7 solution . Wait for the reading to stabilize between pH 6.6 - pH 7.5 .
• Long press the Cal button until CAL is displayed. Release the button. The calibration sequence will begin flashing "0" on the display in sequence. Once “0000” stops flashing, the sequence is complete. Rinse the probe tip in fresh tap water.
• Repeat with pH 4 solution.
• A checkmark will confirm successful calibration.

Hydrate
** Keep the probe hydrated with Bluelab KCl solution. Without proper hydration, readings may be inaccurate and the probe may break.

1. Add enough KCl storage solution to submerge the tip of the probe in a plastic cup and allow to soak for 24 hours.
2. Make sure there are a few drops of KCl solution in the storage cap .

The Bluelab Truncheon Meter is a robust and reliable everyday tool for measuring the concentration of nutrients in solution. With Truncheon, you'll ensure your plants get the nutrients they need for superior plant health.

Truncheon is factory calibrated with no moving parts or switches. Simply dip the probe into your feed tank and take the reading shown on the LED display.

Characteristics:

• Blue light display
• No calibration required
• EC, CF and ppm 500 and ppm 700 scales
• Fully waterproof
• Automatic on/off function

How to take your first measurement:

1. Remove the meter from the packaging.
2. Dip the probe head into your solution.
3. Wait about 10 seconds for the thermistor to reach the temperature of the solution.
4. Read the measurement indicated by the flashing LEDs. If the flashing lights alternate between two numbers, the measurement is the value between those two numbers. For example, if the lights alternate from 0.8EC and 1.0EC, the reading is 0.9EC.
5. Truncheon will turn off after about 10 seconds. If additional measurements are to be taken, remove the stick from the solution, wait a few seconds and reinsert it. It will turn on again.
6. We recommend that the probe be cleaned and accuracy checked in Bluelab 2.77 EC Solution once a month.

Note: For low or high temperatures, it may take 1-2 minutes for the probe to reach solution temperature. Try placing the probe in an area where there is strong movement of the solution, or stir the solution with the probe.

Tip: In addition to being used to measure nutrient levels, the Truncheon Meter can also be used to stir nutrients into your solution.

It is essential when growing hydroponically that you know the strength of the nutrient solution before giving it to your plants.

If the conductivity reading is too low, your plants are not getting enough nutrients. If the conductivity reading is too high, plants can become dehydrated.

- Range : 4-44CF; 0.4-4.4EC; 280-3080ppm
- Resolution : 0.1 EC (1 CF)
- Accuracy : +/- 4% of reported

Professional pH-monitor for long-term use

The devices of the MS series are designed for constant monitoring of pH, EC or TDS values, directly in the tank. Each unit has a mode selection that is set by the user. The LED indicator activates and starts flashing when the pH, EC or TDS level changes above or below (user selected) the set value.

The pH-monitor for constant monitoring of hydroponic or fertilizer solutions , aquariums and aquaponic systems, pools, etc. has a convenient function for visual indication when the pH of the solution passes a set (by the grower) value (up or down, as selected by a knob).

• Manual calibration at 2 fixed points - pH 4 and pH 7.
• Separately connectable sensor compatible with pH monitors of other manufacturers.
• LED alarm
• Supplied with 12 VDC adapter, mounting kit and 20ml pH 7.01 calibration solution
• Dual, cruciform pH electrode with two meter cable (BNC connector)

Manufacturer's warranty - 2 years for the device, 6 months for the sensor. Does not apply to mechanical damage and improper operation!

The MC Monitors are designed to continuously monitor pH, EC or TDS values directly in your reservoir.

An LED alarm is activated and flashes when the pH, EC or TDS level rises either Above or Below (user selected) that set-point. All these instruments run on a 12V adapter so there's no need to worry about failed batteries and each unit comes with mounting kit, probe, probe holder and calibration solution.

• Professional pH monitor especially designed for use with aquariums.
• User selectable Hi/Low Set Point 
• Manual 2 points calibration 
• Visual LED alarm 
• Supplied with 12 VDC adapter, mounting kit, and 20ml pH 7.01 calibration solution 
• Double junction pH electrode with 2m cable (BNC connector)

pH monitor for constant monitoring of hydroponic or fertilizer solutions, aquariums and aquaponic systems, pools, etc.

Convenient function for visual indication when the pH of the solution passes a set value (up or down, selectable by knob). The MC122 controller and dosing pump (MP810) provide fully automated pH control of aqueous solutions in hydroponic systems. It is specially designed for pH management in tanks containing nutrient solution. The small and precise flow of the peristaltic pump allows to maintain ideal pH values in your tank.

After selecting the desired pH setting (from 5.5-9.5), the controller measures the pH value of the solution and automatically adds a pH correction (acids or bases) to adjust the pH of the liquid to the selected level. Manual calibration at 2 fixed points - pH 4 and pH 7. Separately connectable sensor, compatible with pH-monitors of other manufacturers.

Accurate, easy to use and reliable. 24/7 EC monitoring

The Milwaukee MC310 PRO Conductivity (EC) Monitor allows you to automatically measure EC levels and alerts you with an alarm when you are out of set point range.

The MC310 EC automatically monitors your EC levels. Simply set your EC parameters and let the Milwaukee EC Monitor do the rest.
It is often used in nutrient tanks, hydroponics and gardening.
The Milwaukee PRO EC monitor offers:
ACCURACY
The Milwaukee PRO EC monitor offers accuracy up to ±2% of full scale.
AUTOMATION
The monitor has a set point range of 1.0 to 5.0 mS/cm with alarms that activate when readings are above or below the set point.