HM Digital COM-300 Waterproof Professional pH/EC/TDS/Temp Meter

HM Digital COM-300 Waterproof Professional Series pH/EC/TDS/Temperature Meter

4 in 1 TDS Meter Digital Water Tester - Accurate and Reliable TDS EC & Temp(°C,°

COM-360: Waterproof Professional Series pH/EC/TDS/Temp Meter

HM Digital Waterproof Professional Series pH/EC/TDS/Temp Meter : COM-360

COM-100: Waterproof Professional Series EC/TDS Meter

WATERPROOF EC/TDS/TEMP COMBO METER (HM COM-100) Temperature Digital LCD Screen

HM Digital Hydromaster 500 - Continuous pH/TDS/EC/Temp meter(MissingPowerCord)