Measuring Instruments

Indoor thermometer with hygrometer (air-humidity measurement), with memory for minimum and maximum temperature values.

• Temperature measurement range: -10°C to 50°C
• Humidity measurement range from 20% to 90% humidity
• Check the maximum or minimum temperature and humidity by pressing the MAX/MIN button. The data will show the maximum or minimum temperature/humidity for the period since the last reset
• Reset the data by pressing the RESET button once
• To switch the temperature measurement from Celsius to Fahrenheit (or vice versa), use the button located on the back of the device
• Use one 1.5V AA battery
• Warranty: 6 months

The Bluelab pH 4.0 Calibration Solution 250ml reusable pH calibration solution is a high-quality calibration liquid for single-use pH sensors/probes. Bluelab calibration solutions are essential when using all Bluelab measuring instruments. Bluelab calibration solutions are manufactured specifically for Bluelab products and meet high laboratory standards to ensure that your Bluelab products last longer and remain accurate.

• Accuracy: ±0.01 pH
• value: 4.0 pH at 25°C
• volume: 250 ml
• for repeated calibration

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!

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

Bluelab 2.77 EC Conductivity Standard Solution 250ml is a high-quality solution for calibrating EC meters (electrical conductivity meters). Bluelab calibration fluids are essential when working with all Bluelab measuring instruments. Bluelab calibration fluids are specially manufactured for Bluelab products and meet high laboratory standards to ensure that your Bluelab products last longer and remain accurate.

• accuracy: ±0.01 EC
• value: 2.77 µS/cm at 25°C
• volume: 250 ml
• for repeated calibration

Essentials CF Standard 2.8ms 30ml is a buffered solution / calibration fluid for instruments that measure electrical conductivity (EC).

• accuracy: ±0.01 EC
• value: 2.8 µS/cm at 25°C
• volume: 30 ml
• single-use

Bluelab pH 4.0 Calibration Solution 18ml is a high-quality single-use calibration liquid for pH sensors / probes. Bluelab calibration solutions are essential when working with all Bluelab measuring instruments. Bluelab calibration solutions are manufactured specifically for Bluelab products and meet high laboratory standards to ensure that your Bluelab products last longer and remain accurate.

• Accuracy: ±0.01 pH
• value: 4.0 pH at 25°C
• volume: 18 ml
• single-use

🌡️Vanguard Hydroponics Thermo-Hygrometer is a compact and easy to use digital device, designed for precise measurement of temperature and humidity in rooms, greenhouses and hydroponic systems. With its functions for recording maximum and minimum values, as well as an integrated clock and calendar, this device is ideal for monitoring the climatic conditions, which affect plant growth. 

 📋Detailed specifications:

• Manufacturer: Vanguard Hydroponics
• Type: Digital thermo-hygrometer
• Measurement range:
  • Temperature: from -10 °C to +50 °C
  • Humidity: from 30% to 90%
• Functions:
  • Recording of maximum and minimum values
  • Integrated clock and calendar
  • Temperature and humidity trend indicator
• Display: Two-level LCD screen
• Power supply: 1 x AAA 1.5V battery (not included)
• Dimensions: Compact and lightweight design, suitable for tabletop placement or wall mounting
• Origin: China

🔹 Recommendations and instructions for use:

1. Place the device in the room or greenhouse where you want to measure the temperature and humidity.
2. Use the stand on the back for tabletop placement or mount the device on a wall using the provided fixtures.
3. Turn on the device and wait a few minutes for the readings to stabilize.
4. Monitor the current temperature and humidity values, as well as the maximum and minimum values recorded by the device.
5. Use the integrated clock and calendar for additional information about the time.

✅ Benefits of use:

• Precise measurements: Provides accurate temperature and humidity data, which are critical to plant health.
• Easy to use: Intuitive interface with a two-level LCD display for easy data reading.
• Compact design: Suitable for various environments, including greenhouses, hydroponic systems, and indoor spaces.
• Additional features: Integrated clock and calendar for additional information about the time. 

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

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

• pH pen
• Bluelab Soil pH p
en
• Bluelab pH
• Meter Bluelab

pH Probe Product type: storage solution for pH probes and electrodes. Com

 potassium chloride (KCl) — the same type of solution as the internal electrolyte in pH probes, preventing damage and dry

out V

 100 ml Function: keeps the pH probe hydrated, extending its life and ensuring a rapid response

during measurement Compatibility: suitable for all Bluelab pH meters, probes and pens, as well as other

compatible

• devices. Advantages: prevents
• the electrode from drying ou
t
• extends the life of the pH probe

maintains accurate and

stable measurements Recommendations for use: Probe storage: add a few drops to the pH probe cap and close it to

keep the tip constantly moist. Recovery: if the probe has dried out, immerse it in KCl solution

for 24 hours before reusing it Maintenance: use monthly to maintain measurement accuracy

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

The 50 ml measuring cup, graduated in 2 ml increments every 10 ml, offers precision and convenience when measuring different liquids. This tool is ideal for the kitchen, laboratory or garden, where accurate measurement is required.

• Vacuum attachment for mounting on the reservoir.
• Not affected by the salinity of solutions.
• Measurement range: 0-50^oC.

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*

Waltex WX350-0.1 is an electronic pocket scale.

• accuracy: up to 0.1g
• capacity: 350g
• 7 modes of measurement
• function for calibration
• automatic shut-off after: 30 sec.
• batteries: 2 x AAA 1.5V (included)

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

Bluelab Probe Care Kit – pH & Conductivity is a kit containing everything needed to clean, hydrate and calibrate your pH meter probe, as well as clean and test your EC meter probe (electrical conductivity meter):

• Instructions on how to care for the probes of your meters
• 2 x Bluelab pH 7.0 Calibration Solution - Sachet 20ml
• 2 x Bluelab pH 4.0 Calibration Solution - Sachet 20ml
• 2 x Bluelab pH Probe KCl Storage Solution - Sachet 20ml for single use
• 2 x Bluelab 2.77 EC Conductivity Standard Solution Sachet 20 ml for single use
• pH probe cleaning solution
• EC probe cleaning solution
• pH probe cleaning tool
• EC probe cleaning tool

1. Your instruments' measurements are only as accurate as their probes are clean. Accurate measurements simplify crop growing and ensure improved growth.
2. Proper maintenance and storage of your probes ensure the most accurate measurements possible and maximise their lifespan. The probe surface is where the instrument measures the solution. If the probe is uncleaned and contaminated, measurements may be inaccurate. Like a car windscreen: if it is dirty, you will not be able to see the road! If the probe is contaminated, it cannot take accurate measurements.
3. Tip ... if the measured conductivity levels are too low, the probe needs cleaning.
4. The pH probe must be kept wet at all times for optimum performance and a long life!

🔹 pH 7.01 Calibration Solution - 300 ml is specially formulated for calibrating pH meters, ensuring accurate and precise measurements. With its stable pH level of 4.01 at 25°C, it is ideal for checking and adjusting measuring instruments used in hydroponics, aquariums, laboratories, and other applications.

🔹 Detailed specifications:

• Volume: 300 ml
• pH value: 7.01 at 25°C
• Application: Calibration of pH meters
• Composition: Complies with international standards for calibration solutions
• Manufacturer: Wather Masters

🔹 Recommendations and instructions for use:

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

✅ Benefits of use:

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

Milwaukee pH 7.01 230 ml buffered solution / liquid for calibrating pH measuring instruments. Calibrating your pH meter is a simple procedure for optimum performance and should be carried out whenever your instrument's readings appear questionable. Calibration should be carried out at least once a month! 

• accuracy: ±0.01 pH
• value: 7.01 pH at 25°C
• volume: 230 ml

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

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

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

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

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

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

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

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

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

Full product technical specifications here!

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

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

🔹 Detailed specifications:

pH51 - pH Tester:

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

EC66 - Electrical Conductivity (EC) Tester:

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

 Kit contents:

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

✅ Benefits of use:

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

On Balance MYCO MX-600 is a lightweight electronic pocket scale with compact dimensions and design. The hard plastic lid protects the measuring sensor during transport or storage and also serves as an expandable tray.

• weighing capacity: max. 600 g
• measurement accuracy: up to 0.1 g
• automatic shut-off function after 3 minutes of inactivity
• Tare/Zero function for subtracting the tray weight
• easy calibration with one touch
• dimensions: 9.2 x 6 x 2 cm
• batteries: 2 x AAA (included)

Instructions for use: here*

Features:

• removable lid / tray
• weighing capacity: max. 600 g
• measurement accuracy: up to 0.1 g
• easy-to-read measurements on the green LCD display
• built-in overload protection to protect the scale from damage
• automatic shut-off function after 3 minutes of inactivity
• Tare/Zero function for subtracting the weight of the tray
• easy calibration with one touch
• batteries: 2 x AAA (included)
• scale dimensions: 9.2 x 6 x 2 cm
• platform dimensions: 5.6 x 5.6 cm
• weight (with batteries): 66.1 g
• package dimensions: 10.4 x 6.3 x 2.2 cm
• warranty: 10 years

Avoid:

1. Use on uneven surfaces!
2. Use near radio-frequency transmitters!
3. High humidity!
4. Use near strong air currents!
5. Vibrations!
6. Extreme temperatures!

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

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

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

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

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

Technical specifications

✔️ Manufacturer: Growth Technology

✔️ Product type: pH probe refill and storage solution

✔️ Pack size: 300 ml

✔️ Main ingredient: Diluted potassium chloride (KCl)

✔️ Suitable for pH electrodes with liquid electrolyte

✔️ Maintains the correct electrolyte level

✔️ Prevents the electrode from drying out

✔️ Improves measurement accuracy

✔️ Extends pH probe life

✔️ Suitable for laboratory, hydroponic and horticultural applications

❌ Not suitable for gel-filled probes

Benefits

✔️ Maintains maximum pH-measurement accuracy

✔️ Protects electrodes from drying out

✔️ Extends probe service life

✔️ Suitable for both storage and refilling

✔️ Reduces the risk of incorrect readings

✔️ Easy to use

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

Application

Suitable for:

• pH meters

• pH electrodes with liquid electrolyte

📋 Instructions for use

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

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

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

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

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

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

Full product technical specifications here!

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

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

Measuring cup 100 ml

• Precision measuring cup with 10 ml graduations and main markings every 20 ml. Ideal for accurate dosing.