plus other brands requiring 1382 ppm calibration

and food processing to prevent oxidation and extend shelf life

Aquaculture & aquaponics water quality monitoring

and calibration buffers

Tested to NSF/ANSI-42 & 53 standards

HM Digital HM-500 HydroMaster pH EC TDS Temperature Monitor - Rechargeable Continuous Tester water purification tester plus other brands requiring 1382HM 500 HydroMaster: EC TDS, pH, Temp Continuous Monitor The HM 500 is the most versatile continuous monitor indicating EC TDS, pH, and Temp providing accurate, stable readings the user can rely on. With its rechargeable battery this unit is portable or can be wall mounted.. To make is even more user friendly, it comes equipped with touch screen, high and low alarm set points, and recorded readings. It is ideal for hydroponics and other applications