Vaisala HMT360 Series Intrinsically Safe Humidity & Temperature Transmitters
Starting at $2,781.00

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  • Division 1 and 2 (USA, Canada), categories 1G/Zone 0 and 1D / Zone 20 w/protection cover
  • HUMICAP Sensor
  • Temperature Range: -40 to 180°C (-40 to 356°F)
  • RH measurement: 0 to 100%
  • Operating voltage: 12 to 28V
  • 4 to 20mA output
  • Models:
    • HMT361 for wall mounting
    • HMT363 for duct mounting and tight spaces
    • HMT364 for high pressures up to 100 bar and vacuum conditions
    • HMT365 for high temperatures
    • HMT367 for high humidities
    • HMT368 for pressurized pipelines up to 40 bar

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.

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.

The microprocessor-based electronics, options and accessories, make the HMT360 series truly flexible. Transmitter configuration may be specified during ordering and changes in the configuration can also easily be made in the field.

The Vaisala HMT360 transmitters are an investment; their rugged design, combined with trouble-free operation, ensures a long-term solution for monitoring humidity and dew point in explosive environments. In addition to the standard Vaisala HUMICAP® Sensor, an application specific, very chemically durable sensor is available.

Vaisala HMP360 Series Interchangeable Probes

The HMT360 Humidity and Temperature Transmitters use the HMT360 probes for various applications. The interchangeable probes enable fast and easy removal and re-installation. The modular structure enables easy calibration. All calibration coefficients are included in the probe unit itself, which means that probes can be switched between transmitter bodies without losing the accuracy.

Mounting Bracket

Vaisala 210697 Duct Installation Kit
0 to 10in (0 to 25cm) adjustable depth, includes flange, supporting bar, plastic sealing ring, screws, and washers
Vaisala 210696 Mounting Flange
Duct installation flange designed for 13.5mm diameter probes, includes plastic sealing ring, screws, and washers


Vaisala HMP360 Series Humidity & Temperature Probes
Replacement probes for the Vaisala HMT360 Series Intrinsically-safe Humidity & Temperature Transmitters


Please consider these optional accessories.

Vaisala 210664 Stahl Zener Barrier
Enable intrinsic safe operation of the HMT360, each 4-20mA output of the transmitter requires a safety barrier
Vaisala SWG12NPT12 Swagelok
Fitting for 12mm diameter probe with 1/2in NPT male thread, rated for up to 145 psi (10 bar)


This product can be used in the following applications: