HM Digital COM-100 Waterproof EC/TDS & Temperature Combo Meter MC122 Calibrate with distilled or deionized

Calibrate with distilled or deionized water before first use and periodically thereafter

Rust particles — iron oxide particles from aging pipes and plumbing infrastructure

Temp Range: 1 – 99 ˚C (ATC Range)

and food processors

HM Digital COM-100 Waterproof EC/TDS & Temperature Combo Meter MC122 Calibrate with distilled or deionizedCOM 100: Waterproof Professional Series EC TDS Meter The COM 100 is a professional grade level EC TDS Temp meter ideal for all water quality testing, hydroponics, water purification applications, wastewater regulation, aquaculture, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment and more. FEATURES: Measures electrical conductivity (EC), total dissolved solids (TDS), salinity and