HM Digital Hydromaster 100 - Continuous pH/TDS/EC/Temp meter fans-ventilation-ducting resulting in plenty of lush

resulting in plenty of lush green foliage

The #1 selling filter in gardening and hydroponics for 10+ years

Temperature verification includes calibration & temp chamber uniformity following ASTM standards

A multiple point CO2 and T factory adjustment procedure leads to excellent CO2 measurement accuracy over the entire T working range

HM Digital Hydromaster 100 - Continuous pH/TDS/EC/Temp meter fans-ventilation-ducting resulting in plenty of lushDescription HM 100: Continuous pH EC TDS Temp Monitor 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 and scientific testing, pools and spas, ecology testing, boilers and cooling towers, water treatment and more. Features Measures Potential Hydrogen (pH), Electrical Conductivity (EC), Total Dissolved Solids (TDS),