HM Digital Product Documents
The HM Digital pH / TDS / EC / Temp meter (COM-300) is an advanced waterproof combo meter with superior accuracy.
The HM Digital pH / TDS / EC / Temp meter (COM-300) is a professional grade level pH/EC/TDS/Temp meter 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.
HM Digital pH / TDS / EC / Temp meter Features:
- Measures Potential Hydrogen (pH), Electrical Conductivity (EC), Total Dissolved Solids (TDS), and Temperature
- 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, data-hold function and low-battery indicator
- Display: large and easy-to-read LCD screen includes simultaneous temperature reading
- Replaceable Sensor (model SP-C3)
- Factory Calibrated (pH/EC/TDS)
Note:442 is a registered trademark of the Myron L Company.
HM Digital pH / TDS / EC / Temp meter Applications:
- Aquaculture
- Aquarium
- Drinking Water
- Food & Beverage
- Hydroponics
- Industrial
- Pool/Spa
- Water Treatment
HM Digital pH / TDS / EC / Temp meter Specs:
| pH Range: |
0 – 14 pH |
| EC Range: |
0 – 9990 µS; 0 – 9.99 mS |
| TDS Range: |
0 – 8560 ppm (0.7 Scale); 0 – 5000 ppm (0.5 Scale) |
| Temperature Range: |
0-55 °C; 32-130°F |
| pH Resolution: |
0.1 pH |
| EC Resolution: |
0 – 999 : 1μS ; 1000 – 9990 : μS ; 0- 9.99 mS :0.01 mS |
| TDS Resolution: |
0 – 999 : 1ppm / 1000 – 9990: 10 ppm |
| Temperature Resolution: |
0.1 °C/°F |
| Accuracy: |
+/- 2% |
| EC to TDS Conversion Factor: |
Non-linear conversions for KCl, 442TM or NaCl solutions, selected by the user. |
| Probe: |
Detachable platinum electrodes & pH glass sensor with reference tube electrodes |
| Housing: |
IP-67 Waterproof (submersible; floats) |
| Power source: |
2 x Triple A (AAA) included |
| Dimensions |
7.3 x 1.3 x 1.3 inches |
| Weight: |
101.5g (3.6 oz) |
