HM-Waterproof EC/TDS/Temp Combo Meter
Brand: HM Digital Meters
Measures EC, TDS and temperature. It has three different calibration options (KCl, 442TM, NaCl), each with its own non-linear conversion factor, and Automatic Temperature Compensation (ATC) using three temperature coefficients.

Measurement Range: 0-9990 uS; 0-8560 ppm (auto ranging).
Item Number: HMDCOM100
$74.95 (EACH - 1 lbs)