The Vaisala HMT330 Series HUMICAP® transmitter provides accurate humidity and temperature measurement for harsh industrial environments with high chemical…
The HMT330 series HUMICAP® transmitters are designed for demanding industrial humidity and temperature monitoring. They feature the latest generation HUMICAP® sensor with improved stability, chemical resistance, and accuracy, as well as an IP65‑rated housing and optional data‑logging modules that can store up to four years of measurement history.
The devices support multiple power supplies (10‑35 VDC or 24 VAC), up to three analog outputs, and a range of communication interfaces including RS‑232, RS‑485, USB and optional Ethernet or wireless LAN. Installation options cover wall‑mount, DIN‑rail, pole/column kits and various probe configurations for high‑pressure, vacuum or high‑temperature applications.
| Humidity range | 0 % RH – 100 % RH |
|---|---|
| Temperature range | -70 °C – +180 °C (depending on model) |
| Maximum pressure rating | 100 bar (depending on model) |
| Humidity accuracy (0‑90 % RH) | ±1 % RH |
| Power supply voltage | 10 VDC … 35 VDC, 24 VAC (optional 100 V…240 VAC) |
| Analog output current range | 0 mA … 20 mA |
| Display | Back‑lit LCD with graphical trend display |
| Communication interfaces | RS‑232, RS‑485, USB, optional Ethernet (10/100Base‑T) or wireless LAN |
The HMT330 series can measure humidity from 0 % RH up to 100 % RH.
The chemical cleaning function can be activated manually or automatically at programmed intervals to heat the sensor and remove harmful chemicals.
The transmitter can be powered from 10 V to 35 V DC, 24 VAC, or with optional modules for 100 V‑240 V AC.
It supports RS‑232, RS‑485, USB, and optional Ethernet (10/100Base‑T) or wireless LAN connections.