HM Digital HM-100 Continuous pH, EC, TDS and Temperature Monitor
The HM Digital HM-100 is a continuous water-quality monitor designed to measure pH, EC, TDS and temperature. It displays pH, temperature and the selected EC or TDS reading simultaneously, allowing users to monitor important water parameters without repeatedly switching screens.
Suitable for hydroponics, water treatment, aquaculture, laboratories and industrial water-quality applications, the HM-100 provides continuous readings, adjustable alarms and replaceable sensors in a convenient wall-mountable design.
Key Features
- Continuous monitoring of pH, EC, TDS and temperature
- Simultaneous display of pH, temperature and EC or TDS
- Large, easy-to-read multi-parameter display
- Automatic Temperature Compensation from 0 to 60°C
- Adjustable high and low alarms for each parameter
- Audible alarm with optional mute function
- Digital calibration for pH, EC/TDS and temperature
- Selectable TDS conversion factors of 0.5 and 0.7
- Stores up to six sets of measured values
- Replaceable pH and EC/TDS-temperature sensors
- Wall-mountable design for continuous installations
Measurement Specifications
| Parameter | Range | Resolution | Accuracy |
|---|---|---|---|
| pH | 0.1–14.0 pH | 0.1 pH | ±0.1 pH |
| EC | 0–10.00 mS | 0.01 mS | ±2% |
| TDS | 0–9990 ppm | 1 ppm or 10 ppm, depending on range | ±2% |
| Temperature | 0–60°C / 32–122°F | 0.1°C / 0.1°F | ±1°C |
Alarm and Data Storage
Users can configure independent high and low alarm limits for the measured parameters. When a reading moves outside the configured range, the corresponding value flashes and an audible alarm alerts the operator. The alarm sound can also be muted when required.
The HM-100 can store up to six sets of measured values for later recall directly from the instrument.
Applications
- Hydroponics and nutrient-solution monitoring
- Aquaculture and fish-farming systems
- Water purification and treatment systems
- Laboratory water-quality monitoring
- Industrial water monitoring
- Process-water monitoring
Additional Specifications
- Automatic Temperature Compensation: 0–60°C
- TDS conversion factors: 0.5 NaCl and 0.7 442
- Alarm settings: Independent high and low limits
- Data storage: Maximum six data sets
- Power requirement: 5 V / 1 A
- Operating environment: 0–50°C, maximum 80% RH
- Weight: Approximately 285 g, excluding sensors and accessories
Why Choose the HM Digital HM-100?
The HM-100 combines multiple water-quality measurements in one continuously operating instrument. Its simultaneous display, configurable alarms, replaceable sensors and wall-mountable construction make it suitable for applications where water conditions must be checked regularly without performing separate manual measurements.
Need help confirming suitability? Contact SciSpectrum Lab Essentials with your application, expected measurement range and required parameters for product-selection assistance and quotation.
Product overview
Key features
Applications
Specifications
| ph_range | 0.1 – 14.0 pH |
| temperature_range | 0.0 – 60.0 °C / 32.0 – 122.0 °F |
| tds_range | 0 – 9990 ppm |
| ec_range | 0 – 10.00 mS |
| ph_resolution | 0.1 pH |
| temperature_resolution | 0.1 °C / 0.1 °F |
| tds_resolution | 1 ppm (0–999 ppm) / 10 ppm (1000–9990 ppm) |
| ec_resolution | 0.01 mS (0–10.00 mS) |
| ph_accuracy | ±0.1 pH |
| temperature_accuracy | ±1 °C / °F |
| ec_tds_accuracy | ±2% |
| atc_range | 0.0 – 60.0 °C |
| data_store | Max. 6 data values |
| alarm | LOW, HIGH (assigned separately) |
| power | 5V / 1A |
| usage_environment | 0 – 50 °C / RH 80% |
| sensor | Electroconductivity sensor / single junction Ag/AgCl pH sensor |
| weight | 285 g (excl. sensors / accessories) |
Applications
Features & benefits
Downloads
Frequently asked questions
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