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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) |
| Brand | HM Digital |
|---|---|
| SKU | GG-660005 |
| Weight (lb.) | 0.5500 |
| Height (in.) | |
| Prop 65 | false |
| Lead Time | 2-3 |
| Length (in.) | |
| Width (in.) | |
| Warranty | 1 Year |
| Hazardous Material | false |
| UPC | 891144000595 |
| ETL Listed | No |
| UL Listed | No |
| Shipping Restrictions | AK, HI |
What does the HM Digital COM-300 Pro Series meter measure?
The HM Digital COM-300 Pro Series meter measures pH, electrical conductivity (EC), total dissolved solids (TDS), and temperature. The meter supports pH, µS, mS, ppm 0.5 (NaCl), and ppm 0.7 (442) scales.
How does the HM Digital COM-300 Pro Series meter support accurate water testing?
The HM Digital COM-300 Pro Series meter provides +/- 2% accuracy, automatic temperature compensation, and digital push-button calibration. The meter is factory calibrated for pH, EC, and TDS.
Can the HM Digital COM-300 Pro Series meter measure hydroponic water and other water types?
The HM Digital COM-300 Pro Series meter is designed for hydroponics, aquaculture, aquariums, drinking water, water treatment, pools, spas, and other water quality testing applications.
Can the HM Digital COM-300 Pro Series meter operate in submerged water testing?
The HM Digital COM-300 Pro Series meter has an IP-67 waterproof housing designed for submersion, and the meter floats.
Can the HM Digital COM-300 Pro Series meter receive a replacement sensor?
The HM Digital COM-300 Pro Series meter has a replaceable sensor, model SP-C3. The probe uses detachable platinum electrodes and a pH glass sensor with reference tube electrodes.