The Vaisala HMT100 temperature and humidity transmitter is designed for monitoring temperature and humidity in demanding environments, particularly in the HVAC field. It features full-range relative humidity measurement, fixed and remote probes, and the ability to display relative humidity, dew point, and temperature.
The HMT100 transmitter is designed for demanding HVAC environments such as indoor spaces, livestock farms, greenhouses, indoor pools and outdoor installations. It uses Vaisala's HUMICAP® sensor technology for accurate relative‑humidity measurement and offers both wall‑mounted and remote‑probe configurations with optional display modes.
The manual details performance data, electrical connections (4‑20 mA or 0‑10 V outputs), power requirements, mechanical dimensions, enclosure protection (IP65/NEMA 4), and recommended calibration procedures using Vaisala handheld instruments or humidity calibrators. This manual is written in Chinese.
| Relative humidity measurement range | 0 – 100 %RH |
|---|---|
| Relative humidity accuracy (0‑90 %RH) | ±1.7 %RH |
| Relative humidity accuracy (90‑100 %RH) | ±2.5 %RH |
| Temperature measurement range | -40 – +80 °C |
| Temperature accuracy at +20 °C | ±0.2 °C |
| Current‑loop output | 4 – 20 mA (two‑wire) |
| Voltage output options | 0‑1 V, 0‑5 V, 0‑10 V |
| Power supply | 10 – 35 VDC / 24 VAC |
| Enclosure protection rating | IP65 (NEMA 4) |
| Sensor type | Vaisala HUMICAP® 180 |
Yes, the probe is interchangeable and does not require recalibration after replacement.