Intrinsically Safe Humidity and Temperature Transmitters


The Vaisala HUMICAP® Humidity and Temperature Transmitter Series HMT360 are the ideal solution for measuring humidity in hazardous areas. They operate safely and reliably even in the most hazardous classifications. The HMT360 transmitters' proven performance and technology conform with rigorous international standards

Intrinsically safe
The entire HMT360 transmitter can be installed directly in explosive areas. It can withstand continuous exposure to potentially explosive environments that contain flammable gases or dust.

Customized configuration
Due to the microprocessor based electronics, options and accessories, the HMT360 series is truly flexible.
Customers may specify the transmitter configuration when ordering the instrument, however changes in configuration can also easily be made in the field.

Interchangeable probes
The HMT360 offers six probe options for various applications:
HMP361 - wall mount
HMP363 - confined spaces
HMP364 - pressurized spaces
HMP365 - high temperature
HMP367 - high humidity
HMP368 - pressurized pipelines
The interchangeable probes enable fast and easy removal or re-installation when required.
Calibration, for example, is easy to perform due to the modular structure.
All calibration coefficients are included in the probe unit itself, which means that probes can be switched between transmitter bodies without losing the accuracy.

Optimized sensors
In addition to the standard Vaisala HUMICAP® Sensor, an application specific, very chemically durable sensor is also available.

Long-term solution
The HMT360 transmitters are an investment; their rugged design, combined with trouble-free operation, ensure a long-term solution for monitoring humidity and dewpoint in explosive environments.
Customized calibration and maintenance contracts for the HMT360 series are available on request.

  • Measures humidity and temperature, outputs also dew point, mixing ratio, absolute humidity and wet bulb temperature
  • Safe operation with the entire transmitter in hazardous areas: Division 1 and 2 (USA, Canada), Categories 1G / Zone 0 and 1D / Zone 20 with protection cover (EU)
  • Intrinsically safe
  • Designed for harsh conditions
  • Vaisala HUMICAP® Sensor features high accuracy, excellent long-term stability, and negligible hysteresis
  • Six probe options
  • Temperature range between -40 … +180°C (-40 … +356°F) depending on the probe option
  • NIST traceable (certificate included)


Types Of Humidity Products - Fixed Installations/OEM Products

  • HMT330

  • HMT360

  • HMT310

  • HMDW80

  • HMT120/130

  • HMW90

  • HMDW110

  • HMS110

  • HMS80

  • HMP60

  • HMP110

  • HMM100

  • HMP3

  • HMP4

  • HMP5

  • HMP7

  • HMP8

  • HMP9

  • INDIGO 200

  • INDIGO 520

  • TMP1

  • HMM170

  • HMD60