The HM-100 is a pH/EC/TDS/Temp monitor 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.
The HM Digital HydroMaster HM100 conveys 3 critical parameters for successful gardening. The HM100 is a versatile continuous monitor that displays pH, EC (µS/mS), TDS (.5 (NaCl) / .7 (442)) & Temperature (°F / °C) providing accurate, reliable readings the user can rely on year after year. The HM100 can be wall mounted for 24/7 monitoring.
Features
Measures Potential Hydrogen (pH), Electrical Conductivity (EC), Total Dissolved Solids (TDS), Salinity and Temperature
This sett up is great relatively easy compared to all the other methods I've use over the last 40 years at my age simple and easy with great results is where it's at