HMT100 temperature and humidity transmitter is designed for temperature and humidity monitoring in harsh environments. Typical applications include stable indoor environments, HVAC, livestock farms, greenhouses, indoor swimming pools, and outdoor applications. HMT100 uses HUMICAP® sensor technology to ensure the accuracy and reliability of relative humidity measurements. The Vaisala HUMICAP® sensor is unaffected by dust and most chemicals. HMT100 is available in wall-mounted and remote probe versions with display options. When used in high temperature environments or tight spaces, remote probes are the ideal choice. HMT100 can display only relative humidity, dew point, or both relative humidity and temperature, or dew point and temperature readings. Probes are interchangeable and no recalibration or adjustment is required after replacing the probe. HMT100 can also be installed outdoors using mounting accessories or directly installed on air conditioning ducts using a pipe fitting.
The HMT100 temperature‑humidity transmitter is designed for demanding HVAC applications such as indoor climate control, livestock farms, greenhouses, indoor pools, and outdoor installations. It uses Visara’s HUMICAP® sensor technology for accurate and reliable relative‑humidity measurements, and the probe can be swapped without recalibration.
Two versions are available – a wall‑mount unit and a remote‑probe unit – both with optional display functions. The device can be installed directly on ducts or mounted outdoors using the provided accessories, and it complies with IP65 (NEMA 4) protection standards. Calibration is recommended annually using Visara handheld instruments (HM70, HMI41) or the HMK15 humidity calibrator. This manual is written in Chinese.
| Relative humidity measurement range | 0‑100 %RH |
|---|---|
| Temperature measurement range | -40 °C … +80 °C |
| Output signal (2‑wire) | 4‑20 mA |
| Output signal (voltage) | 0‑1 V, 0‑5 V, 0‑10 V |
| Power supply | 10‑35 VDC / 24 VAC |
| Housing material | ABS/PC plastic |
| Ingress protection rating | IP65 (NEMA 4) |
It measures relative humidity from 0 %RH to 100 %RH.
Visara recommends calibrating the unit once a year.
Yes, the probe is interchangeable and does not require recalibration after replacement.