Intrinsically Safe Humidity and Temperature Transmitter Series HMT370EX

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The humidity and temperature transmitter HMT370 series for humidity measurement for EX areas is available throughout Austria from Industrie Automation Graz, IAG.

Intrinsically Safe Humidity and Temperature Transmitter Series HMT370EX for use up to zone 0 and 20

Product Description

HMT370 for humidity and temperaturemeasurement:

Please note that the HMT370EX has been released with IECEx and ATEX certificates for intrinsically safe compliance, but FM and  CSA approval are still pending.

The intrinsically safe HMT370EX is the ideal solution for use in hazardous areas up to zone 0 and 20. In addition to measuring relative humidity and temperature, the transmitter outputs also other humidity parameters: dew point temperature, wet-bulb temperature, absolute humidity, mixing ratio, water concentration, water mass fraction, water vapor pressure, and enthalpy. Special models for moisture in oil and jet fuel measurements are available.

Typical applications include fuel storage tanks, manufacturing of chemicals, pharmaceuticals and food, biogas production' paint booths and any other industry or process where intrinsically safe humidity or moisture in oil measurement is required.

This next-generation HMT370EX transmitter replaces the long-running HMT360 transmitter series.

The HMT370EX offers several probe options for different applications:

HMT371 for Wall Mounting

HMT373 for Confined Spaces

HMT374 for Pressurized Spaces

HMT375 for High Temperature

HMT377 for High Humidity

HMT378 for Pressurized Pipelines


Models for measuring moisture in oil and jet fuel:

HMP378F for moisture in oil

HMP378H for JET A-1 fuel

The HMT370EX uses the superior Vaisala HUMICAP technology. 

Technical Specification

Features HMT370 for humidity and temperature measurement:

  • Intrinsically safe (Exi)

  • Interchangeable probes

  • Detachable probe module

  • Graphical LCD display and non-display model

  • Vaisala HUMICAP® sensor

  • Compatible with Vaisala Insight PC software

  • Traceable calibration (certificate included)