Meters and Testers

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The Bluelab Carry Case provides a custom fit so you can use and read your Bluelab Meter right from the carrying case. Simply zip it closed and your meter is protected during storage or transport.
The Bluelab Combo Meter is the lightweight, easy, and accurate way to test the conductivity, temperature, and pH levels.
Closely monitor the pH, conductivity, and temperature around your grow room with the Bluelab Guardian Monitor. These are all important factors to plant growth.
$179.95
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Use the Bluelab pH Meter to easily test and read the pH level of your plants' nutrient solution.
The Bluelab pH Pen has been specially developed as an affordable, effective tool for hobby or small scale growers.
The Bluelab pH Probe is used to measure the pH of a solution.
The Bluelab ppm Pen measures conductivity and temperature to ensure your plants are receiving the proper amounts of nutrients.
Everything you need to keep your pH probe clean and maintain accurate readings with the BlueLab Probe Care Kit!
Bluelab Soil pH Meter is a reliable meter that is easy to use. Monitor the pH in your soil or hydroponics growing media to ensure it is perfect for the plants your are growing.
The Bluelab Soil pH Pen provides both pH and temperature readings of soil and grow media, an effective tool for hobby or small scale gardeners.
The Bluelab Soil pH Probe serves as original equipment replacement for the Bluelab Soil pH Meter, but can also be attached to the Bluelab Combo Meter.
The Bluelab Truncheon Meter is the best selling hydroponics CF / EC Meter in the world. The Truncheon meter measures EC, CF and PPM scales.
$79.50
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The EcoTestrâ„¢ pH 2 has an easy-to-read display and its ergonomically designed LC display allows you to read measurements in a glance.
When you need continuous reservoir readouts of pH, TDS and temperature, the Nutradip Trimeter is your solution.
This original equipment replacement probe fits the Nutradip tri-meter.
Model HI 98106: The Hanna Instruments Champ pH Tester is an affordable, easy-to-use pH pen that is ready-to-use right out of the box.
Model HI 98103: At the cost of just a few rolls of litmus paper, you can have the industry's best pocket-sized pH tester, made by Hanna Instruments!
Model HI 991404: A large backlit LCD continuously monitors the three most important nutrient parameters in greenhouse, hydroponics and horticultural applications.
Model HI 98129: pH/EC/TDS/Temperature tester by Hanna Instruments has a completely waterproof shell that also floats. It offers high accuracy readings with dual-level LCD readout.
Model HI 98311: Hanna Instruments DIST 5 EC/TDS/temperature tester is waterproof. It even floats. Gauges temperature from 0.0 to 60.0 °C or 32.0 to 140.0 °F.
Model HI 1285-6 preamplified pH and EC Probe with CAL CHECK is the replacement probe for the Hanna Instruments HI 9813-6N Portable Meter.
The Hanna Instruments HI 9813-6N pH/EC/TDS/°C Portable Meter is specifically designed for agricultural applications such as hydroponics, greenhouses, farming and nurseries.
Model HI 98128 (pHep 5): This Hanna Instruments waterproof tester features a dual-level LCD that gauges pH level -2.00 to 16.0, and temperature from 23.0 to 140.0 °F (-5.0 to 60.0 °C).
The Hanna Instruments HI 710007 Shockproof Rubber Boot is designed to be used with the HI 9813-6(N) portable pH/EC/TDS/temperature meter.
The Hanna Instruments Combo pH/ES/TDS/Temp Tester Spare Electrode can be replaced to renew function and accuracy for your Hanna Instruments Brand Tester.
The Milwaukee Instruments Martini EC59 multi pocket tester measures and displays EC TDS and Temperature simultaneously on an easy to ready display.
The Mi56P replaceable electrode is used with Martini pH55 and pH56 pH / temperature meters.
The Milwaukee Instruments Martini pH55 Waterproof pH & Temperature tester has a large display with graphic symbols to help guide you through all operations.
$99.95
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The Milwaukee MW100 portable pH meter replaces the model SM100 and is a no-frills low-cost tool that is ideal for beginners.
The Milwaukee pH600 Tester is an easy-to-use, economical instrument that measures quick and reliable pH values.
The Milwaukee MW802 portable 3-in-1 meter allows you to measure pH, EC (conductivity) and TDS with just one instrument using a single probe. (replaces model SM802)
The Milwaukee SE600 pH/EC/TDS combination probe is the replacement for both MW801 and MW802 models of combo meters.
$174.95
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The waterproof Oakton Multi PT Testr 35 is a pocket-sized meter used for pH, TDS and temperature readings.
The Rapitest Digital Soil pH Meter is an easy-to-use soil pH tester that determines soil acidity and alkalinity.
Ideal for testing soil pH levels of your indoor potted plants or outdoor garden areas. The Rapitest Soil pH Meter measures pH levels from 3.9 to 9.0.
Model HI 991404: A large backlit LCD continuously monitors the three most important nutrient parameters in greenhouse, hydroponics and horticultural applications.
Model HI 98103: At the cost of just a few rolls of litmus paper, you can have the industry's best pocket-sized pH tester, made by Hanna Instruments!
This is the original equipment from Milwaukee that replaces the pH electrode on model MW100, MW101 and MW102 pH water testers.
The Sunleaves Digital 4-Way Soil Meter is a great tool for outdoor gardeners or indoor gardeners growing plants potted in soil.
Monitor soil pH on a scale of 4 to 8 with the durable, easy-to-read Sunleaves Soil pH Tester.
The STEP505 replacement probe is the same high-quality component that ships with the Sunleaves TDS Expert Plus.
Conveniently test the moisture, light, and pH levels of your plants with the Sunleaves Three-Way Meter.