Description
HM Digital Pro COM-100 TDS EC Temp Meter
The HM Digital Meter PRO COM-100 is one of the most affordable and accurate EC/TDS readers in the market today.
With its large LCD, this pen-sized digital meter can be calibrated and works best for water treatment, purification, and hydroponics.
Features

Simultaneous Readings
The COM-100 measures EC and TDS, along with temperature levels, simultaneously.

Digital Calibration
Press one button, and the COM-100 will calibrate automatically so that you get accurate readings all the time.

Large LCD
The COM-100 might be compact, but its large display ensures you get the correct measurements every time.

Battery-operated
The COM-100 uses a pair of AAA batteries and features an auto-shut to save on power.
Highlights
- Water-resistant
- Large LCD
- Automatic Temperature Compensation (ATC)
- 0 – 9990 ppm (mg/L) TDS Range
- 0 – 80 degrees Celsius Temperature Range
- Digital Calibration
- Auto-off
- Runs on two AAA batteries
Specifications
EC Range: | 0 – 9990 µS; 0 – 9.99 mS |
TDS Range: | 0 – 8560 ppm (0.7 Scale); 0 – 8.56 ppt (0.7 Scale) |
| 0 – 5000 ppm (0.5 Scale); 0-5.00 ppt (0.5 Scale) |
Temperature Range: | 0-55 °C; 32-130°F |
Resolution: 0-99: | 0.1 µS/ppm/ 0.01mS/ppt; 100-999: 1 µS/ppm; 1000-9990: 10 µS/ppm. Temp. resolution is 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 |
Housing: | IP-67 Waterproof (submersible; floats) |
UPGRADED: Power source: | 2 x Triple A (AAA) included |
Dimensions: | 18.5 x 3.4 x 3.4 cm (7.3 x 1.3 x 1.3 inches) |
Weight: | 127g (4.5 oz) |