Active Air 3-Way Meter

Gardeners can conveniently test their moisture, light, and pH levels with the handy ActiveAir 3-Way Meter. Moisture readings register on a scale of 0 (dry) to 10 (moist), light readings range from 0 (low light) to 2000 (very strong light), and pH readings between pH 0 (acidic) and pH 10 (basic) are represented. The durable, easy-to-read tester is suitable for indoors or out and needs no batteries to operate.

DO NOT LEAVE IN SOIL. CLEAN PRONGS AFTER EACH USE.

Floating Temperature Gauge

Delivers easy and accurate readings of your water temperature. The gauge floats and has a pressure sensitive backing for easy mounting. It features readings in both Celsius and Fahrenheit, as well as clear markings that delineate ideal nutrient temperature.

Bluelab ComboMeter

The Bluelab Combo Meter is a conductivity, pH and temperature meter all in one. It comes with a pH probe and conductivity and temperature probe, which are simply placed into the solution and the selected reading is displayed on screen. The Bluelab Combo Meter is portable and does not require a power supply. Calibration of the pH is very easy, using the push buttons on the meter and fresh Bluelab calibration solutions. Conductivity and temperature do not need to be calibrated as this is locked in during manufacture. Select display options for C or F and EC, CF or ppm.

Bluelab Calibration Solutions

The Probe on Bluelab meter, monitor, Truncheon or controller must be kept clean. If the probe is contaminated or dirty, it affects the accuracy. The probe surface is where the instrument takes the reading of the solution and the information is sent back from the probe to the electronic brain of the instrument. Cleaning is a very easy task and it prolongs the

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Gro'CHEK pH & TDS Combo

Displays pH & EC Simultaneously
Adjustable Setpoints
Space Efficient

Gro'CHEK pH Indicator

Gro'Chek pH/EC/TDS 3-WayMeter

Large, Dual-level Backlit LCD
Waterproof
Auto Calibration & pH Temp. Computing

Gro'Chek EC&TDS Meters

Waterproof
Rugged Housing
Large LCD

Gro'Chek pH/EC/TDS Meters

Automatic Temperature Computing
Fast Response Probe
Simple to Use
Includes Cal-Check Feature

Gro'Chek Combo Temp Tester

Dual-level LCD
Replaceable pH Electrode Cartridge
Automatic Caliibration

Replacement pH Electrode

For H198127/28/29/30

Gro'CHEK Dist 5 Waterproof 3-WayTempTester

Dual-level LCD
Replaceable Graphite Electrode Cartridge
Automatic Calibration

Gro'CHEK pHep 4 Waterproof pH TempTester

Dual-Level LCD
Replaceable pH Electrode Catridge
Automatic Calibration

Gro'Chek pH Stick Tester

Shock Resistant Casing
Water Resistant Housing
Replaceable Electrode

Pen Batteries

Calibration Solution

Hanna's Buffer solutions are made from established formulas and are standardized with a pH meter that is calibrated to NBS/NIST primary standard buffer solutions. The 20 mL sachets are ideal for infrequent calibrations while for heavy-duty
applications, you can choose from the popular 230 mL, 1 liter or 1 gallon containers.

Formulation Hanna pH buffers are made of Potassium Dihydrogen Phosphate and Disodium Hydrogen Phosphate and are standardized with a pH meter that is calibrated to NIST primary standard buffer solutions (NIST 186Ie & 186IIe and NIST 158g S.R.M.)

pHep Tester

pHep(r), the standard in pH measurement with 0.1 pH accuracy, has 2 point calibration, large LCD, pull out replenishable junction and 700 hour battery life. The pHep(r) pH tester features a casing that is more rugged and has been ergonomically enhanced to better fit your hand. The pHep(r) comes with a protective cap that can be used as a measurement vessel. The electrode is replaceable by the operator. With the latest innovation of a non-clogging fiber junction the new pHep(r) meters last much longer. Calibrates on 7.0 and 4.0 solutions.

Champ pH Tester

Champ is a rugged pH meter with single point calibration and a battery life of over 1 year even if used for 1 hour everyday. The new design features a larger LCD so measurments are easier to read from any angle. Champ comes with a protective cap that can be used to hold storage solution or as a meaurement vessel. The electrode itself is replaceable by the user and has a non-clogging fiber junction which makes it last much longer. The Champ can be used for Research, Science, Laboratory, Education, Aquariums, Hydroponics, Pools and more.