HM Digital Hydromaster Portable pH/TDS/EC/Temp Monitor

HM Digital Hydromaster Portable pH/TDS/EC/Temp Monitor

  • $278.38
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HM-200: Portable pH/EC/TDS/Temp Monitor

The HM-200 is a versatile portable 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.


Measures Potential Hydrogen (pH), Electrical Conductivity (EC), Total Dissolved Solids (TDS), Salinity and Temperature

2-10 Days 

Five scales: pH, µS, mS, ppm 0.5 (NaCl) Scale & 0.7 (442™) Scale

Automatic Temperature Compensation (ATC) using three temperature coefficients

Digital Calibration (push button) to any point within the meter’s range

Auto-off function after 5 minutes, data-hold function and low-battery indicator

Stores up to 20 readings

Large and easy-to-read LCD Screen with backlight display

Displays 3 parameters (pH/EC or TDS/Temp) simultaneously.

Replaceable Sensors (model SP-C2 for Conductivity, SP-P5 for pH) Factory Calibrated (pH/EC/TDS)


Range: pH Range: 0-14

EC Range: 0-9999 µS/0-20mS

TDS Range: 0-9999 ppm

Temperature Range: 0-55 °C; 32-130 °F


pH: +/- 0.1

EC: +/- 2%

TDS: +/- 2%

Temp: +/- 1 °C/°F


pH: 0.1

EC: 0.1µS (0-99.9µS), 1µS (100-999µS), 10µS (1000-9990µS), 0.01mS (0.01-20.00mS)

TDS: 0.1 ppm (0-99.9 ppm), 1ppm (100-999 ppm), 10 ppm (1000-9990 ppm)

Temp: 0.1°C, 0.1°F

Dimensions 14 x 6.6 x 2.8 cm / 5.5 x 2.6 x 1.1 in

Total Weight

540g / 1.2 lb


HM-200 Hydromaster portable monitor

SP-P5 pH probe with 2m/78.7" cable

SP-C2 EC/TDS probe with 2m/78.7" cable

Protective rubber boot for the monitor

2 (AA) alkaline batteries

PH-P4 pH 4 buffer solution sachet

PH-P7 pH 7 buffer solution sachet