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Keywords: dissolved hydrogen meter, hydrogen water tester, dissolved H2 tester, ppb hydrogen meter, portable H2 meter
The ENH-100 dissolved hydrogen meter is a handheld instrument for measuring dissolved hydrogen in water. Its dedicated sensor, automatic temperature compensation, and selectable ppb or ppm display make it convenient for routine checks of room-temperature hydrogen water.
1. Measures dissolved hydrogen from 0 to 2,400 ppb (0 to 2.40 ppm).
2. Switches between ppb and ppm display units.
3. Automatic temperature compensation (ATC) over 0 to 50 °C (32 to 122 °F).
4. HOLD function freezes the displayed reading for convenient viewing.
5. Backlit display with automatic on/off control; low-battery and over-range indications.
6. Compact handheld design with a replaceable sensor.
Backlit display | 
Battery compartment | 
Electrode |
| Parameter | Specification |
|---|---|
| Measurement range | 0–2,400 ppb / 0–2.40 ppm |
| Resolution | 2 ppb / 0.02 ppm |
| Accuracy | ±10 ppb / ±0.01 ppm |
| Temperature compensation range | 0–50 °C (32–122 °F) |
| Temperature resolution | 0.1 °C |
| Temperature accuracy | ±0.2 °C |
| Display units | ppb or ppm; °C or °F |
| Functions | Data hold, automatic temperature compensation, backlight, low-battery and over-range indicators |
| Auto power-off | After 10 minutes of inactivity |
| Power supply | 4 × 1.5 V LR44 / AG13 batteries |
| Dimensions | 188 × 38 mm |
| Weight | 82 g |
1. Checking dissolved hydrogen levels in hydrogen-rich drinking water.
2. Routine measurements in water-treatment and hydrogen-water production workflows.
3. Laboratory or quality-control checks where dissolved hydrogen in water is monitored.