Hanna GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester HI98131 CO2 Tanks + Accessories The ROI-E720 is controllable via

The ROI-E720 is controllable via the Growers Choice Master Controller or any 0-10V digital lighting controller

and is certified UL 1598

Canvas Density: 210D

Power factor stays above 0

Hanna GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester HI98131 CO2 Tanks + Accessories The ROI-E720 is controllable viaHanna GroLine Hydroponic Waterproof Pocket pH EC TDS Temperature Tester HI98131 The Hanna GroLine Hydroponic Waterproof Pocket pH EC TDS Temperature Tester (HI98131) is a slim, lightweight, and waterproof pocket sized meter that measures pH, conductivity (EC), total dissolved solids (TDS) and temperature. The meter operation is simplified with two buttons. One is used for on off and for calibration while the other is used to switch between the