pH tester with 1 point calibration, ±0.2 pH accura

Conductivity tester with atc, 0 - 1990 µs/cm

pH/ORP/Temp Bench Meter, -2.00-20.00 pH, ±2000.0mV, -20.0-120.0 °C

pH/ORP/Temp waterproof tester, -2.00 to 16.00 pH