Hanna GroLine Monitor GH "In the case that you

"In the case that you see water marks in your brand new machine

Approximately 12 in diameter

450 gallons per hour

pH and temperature meter all-in-one

Use the mesh side for sheets of A-OK's

Hanna GroLine Monitor GH "In the case that youThe HI981420 GroLine Monitor for Hydroponic Nutrients provides around the clock, continuous monitoring of pH, conductivity (EC & TDS), and temperature in hydroponic nutrient solutions. Quick to setup, simple to use, this monitor was designed with Hydroponics, Aquaponics, and Greenhouses in mind. Make your nutrient solution easy to manage with the GroLine Monitor. Get 24 7 pH&EC measurements for consistent yields every time. Good Laboratory Practice