PH Testers

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Batteries for pH/TDS pen, 1.4V (pack of 4 batteries)


Stock up on batteries for your pH/TDS pen and never be without. The tiny battery discs hardly take up any room—you can even store them right in your pen case so you're always prepared. 

USD $6.99

Bluelab pH Meter


The Bluelab pH Meter is a simple, reliable pH meter that provides accurate readings and unparalleled ease of use. 

USD $209.99

Bluelab pH Pen


The Bluelab pH Pen is a handy option for hobby and small-scale hydroponic growers. Maintaining proper pH levels is key in raising healthy, fruitful plants, and this pen accurately measures both the pH and temperature in hydroponic systems. 

USD $115.99

Bluelab Soil and Nutrient pH Pen

Bluelab Soil pH Pen measures pH and temperature (°F and °C) to ensure proper nutrient uptake from nutrient solutions and soil!

USD $184.99

General Hydroponics pH Test Kit


The pH Test Kit is a liquid tester that covers a pH range of 4.0 to 8.5. Includes sampling tube, reagent and color comparison card. Makes testing easy and reliable.

USD $7.49

HM Digital pH HydroTester


The HM Digital pH HydroTester is a reliable pH meter that is ideal for testing applications such as hydroponics and gardening, pools and spas, aquariums and reef tanks, water ionizers, drinking water and more. 

USD $62.99

HM Digital Waterproof Professional pH/EC/TDS/Temp Meter, COM-300


The HM Digital Waterproof Professional pH/EC/TDS/Temp Meter COM-300 is ideal for water quality testing, hydroponic growing, water purification applications, wastewater regulation, aquaculture, collodial silver, labs and scientific testing, pools and spas, ecology testing, boilers and cooling towers, water treatment, and more. 

USD $159.99

Hydrion pH Test Papers


These Hydrion pH Test Papers come on a 15-foot roll in a plastic holder. Measures a range of 4 to 9.

USD $6.99

Milwaukee pH600 Tester


Milwaukee pH600 Tester is an easy to use, low cost instrument that measures pH values quickly and reliably. 

USD $35.49

Oakton Waterproof EcoTestr pH1


Oakton’s Waterproof EcoTestr pH1 is a convenient pH meter that doesn’t let dirt or moisture keep it from delivering accurate readings. It features a clear LCD display, a waterproof, dustproof housing, automatic shutoff--and it floats. 

USD $72.99

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