HM Digital SP-C5 Replacement Probe - EC/TDS/Temp Sensor for HM-500 HydroMaster pool spa pH ORP controller the TDS-3 delivers fast

the TDS-3 delivers fast

Whether you're carrying water from a source like a spring

Weighs 1 pound

so you get trustworthy data whether you're testing cold irrigation water or a warm nutrient bath

This 2-pack combo provides everything you need for one full year:

HM Digital SP-C5 Replacement Probe - EC/TDS/Temp Sensor for HM-500 HydroMaster pool spa pH ORP controller the TDS-3 delivers fastSP C5 HM 500 TDS EC Replacement Probe (Replacement EC TDS sensor for HM 500) Measures Conductivity and TDS Measures Temperature Application: Aquaculture, Aquarium, Drinking Water, Food & Beverage, Hydroponics, Pool Spa, Water Treatment