Measure humidity in harsh environments with the instrument you can depend on. The Vaisala HUMICAP® Humidity and Temperature Transmitter Series HMT330 is designed for demanding industrial applications where stable measurements and extensive customization are essential.
The HMT330 series features several probe options for different application needs
- HMT331 for wall mounting
- HMT333 for duct mounting and tight spaces
- HMT334 for high pressures up to 100 bar and vacuum conditions
- HMT335 for high temperatures
- HMT337 for high humidity and meteorological applications
- HMT338 for pressurized pipelines up to 40 bar
- Full 0 … 100 %RH measurement, temperature range up to +180 °C (+356°F) depending on model
- Pressure tolerance up to 100 bar depending on model
- 4th generation Vaisala HUMICAPâ sensor for superior accuracy and stability
- Corrosion-resistant IP65/IP66 housing
- Excellent performance in harsh conditions; good chemical tolerance
- Traceable calibration for measurement and analog outputs (certificates included) 10-year warranty when annually calibrated at the Vaisala Service Center
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HMT330 Series Humidity and Temperature Transmitters
The HMT330 series incorporates Vaisala’s 30 years of experience in industrial humidity measurement. An updated, even more stable and chemical resistant HUMICAP® sensor is available, next to the proven reliable and accurate sensor.
In environments with high concentrations of chemicals and cleaning agents, chemical purge option helps to maintain measurement accuracy between calibration intervals. Chemical purge involves heating the sensor to remove harmful chemicals. The function can be initiated manually or programmed to occur at set intervals.
The HMT330 can be ordered with a large numerical and graphical display, which allows the user to clearly monitor operational data, measurement trends and 1-year measurement history. The optional data logger with real-time clock makes it possible to generate over four years of measured history, and zoom in on any desired time or time frame. The battery backup of the clock guarantees a reliable logging of measured data.
The display alarm allows tracking of any measured parameter, with a freely configurable low and high limit.
The recorded measurement data can be viewed on the display or transferred to a PC with Microsoft Windows software. The transmitter can also be connected to a network with an optional (W)LAN interface, which enables a (wireless) Ethernet connection. A USB-RJ45 cable makes it easy to connect the service port of the HMT330 to a PC.
Mains and DC power options, and several mounting accessories make the instrument easy to install. The HMT330 can have up to three analog outputs. Isolated galvanic power supply and relay outputs are also available. For serial interface the USB connection, RS232 and RS485 can be used. HMT330 is also capable in applying the MODBUS communication protocol and together with an appropriate connection option provides either MODBUS RTU (RS485) or MODBUS TCP/IP (Ethernet) communication.
The HMT330 instruments are calibrated at six humidity points at the factory. A quick, one-point field calibration can be performed with the hand-held HM70 meter.
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