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HMT363 Intrinsically Safe (Ex ia) Humidity and Temperature Transmitter for Duct Mounting


The HMT363 is the top-of-the-line duct-mounted intrisincally safe transmitter. In addition to displaying humidity and temperature readings, the HMT363 calculates dew point, absolute humidity, wet bulb temperature, and mixing ratio. The Vaisala HUMICAP® Humidity and Temperature Transmitter HMT360 series incorporates Vaisala’s 30 years of experience in industrial humidity measurement.

The transmitter has a large display for convenient monitoring of the reading and transmitter setting changes. For example scaling can easily be changed by the user.

Analog outputs are preset at the factory to:

  • Channel 1: 4…20 mA = -40...+100°C (-40...+212°F) Td
  • Channel 2: 4...20 mA = -40...+80°C (-40...+176°F) T

Safe operation with the entire transmitter in hazardous areas: Div I and II (USA, Canada), Categories 1G/Zone 0 and 1D/Zone 20 with protection cover (EU).

In order to achieve a safe installation, each 4-20 mA output requires an external intrinsically safe electrical surge barrier. Surge barriers should be located outside the hazardous area in a general purpose electronics enclosure. Each 4-20mA loop will require a separate barrier.

See all HMT360-series Exi transmitters

The package includes:

  • Compact probe with 2 m (6.5 ft) cable
  • Calibration certificate (ISO9001 compliant, traceable)
  • Duct Installation kit
  • NPT1/2" conduit fitting included to facilitate wiring
  • User's Guide in English


HMT363 Intrinsically Safe (Ex ia) Humidity and Temperature Transmitter for Duct Mounting
HMT360-series: HMT363 Intrinsically Safe Humidity and Temperature Transmitter for Duct Mounting
Standard delivery time for single unit: 1 week
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Warranty: 24 months
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