Intrinsically Safe Humidity and Temperature Transmitter Series HMT370EX

For use up to zone 0 and 20

Please note that the HMT370EX has been released with ATEX, IECEx, CML, NEPSI, KC, FM, CSA and UKEX certificates for intrinsically safe compliance.

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.

Datasheet

Order Form

Typical applications

Typical applications include fuel storage tanks, manufacturing of chemicals, pharmaceuticals and food, paint booths, and any other industry or process where intrinsically safe humidity or moisture in oil measurement is required. View the current certificates for the HMT370EX:

Replaces the HMT360 transmitter series

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

The HMT370EX offers several probe options for different applications:

HMP371 - for wall mounting
HMP373 - for confined spaces
HMP374 - for pressurized spaces
HMP375 - for high temperature
HMP377 - for high humidity
HMP378 - 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.

Features

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)

Video Player

Key benefits

Intrinsically safe

The entire HMT370EX transmitter can be installed directly in explosive areas. It can withstand continuous exposure to potentially explosive environments that contain flammable liquids, gases or dust. Operation in any of these environments requires no additional protective enclosures.

Detachable probes

Probes can be easily replaced and removed for calibration outside the hazardous area without removing the entire transmitter. Attaching new probes involves minimal reconfiguration, as up-to-date settings can be restored from the transmitter.

Easy to configure

Output configuration and measurement calibration and adjustment can be carried out directly on the optional local display interface. Alternatively, you can connect the transmitter to Vaisala Insight PC software and configure both the transmitter and the probe together or separately.

Product documentation

Datasheets User guides Order form More in Docs.vaisala.com

More downloads

Product Resources

Blog

Safely monitor hazardous and explosive environments with the Vaisala HMT370EX

For decades those operating in hazardous environments have trusted the Vaisala HMT360 to measure humidity and temperature safely and reliably, even in zone 0 areas. Now the intrinsically safe Vaisala HMT370EX can provide the same safe and reliable measurement data, with several key new benefits.

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Release

Vaisala launches the next-generation humidity and temperature transmitter series HMT370EX for hazardous environments

The new Vaisala HUMICAP© Intrinsically Safe HMT370EX Humidity and Temperature Transmitter Series builds on over 20 years of experience with the trusted Vaisala HMT360 series with an even more robust and easy-to-use design.

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Expert article

Q&A about intrinsically safe measurement devices

In this Q&A blog we take a look at what we mean when we talk about intrinsically safe devices, where they can be installed, and what other safety precautions need to be considered when using them.

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Application note

Intrinsically safe instruments help to minimize risks in hazardous locations

In an intrinsically safe system, all of the equipment is designed and installed in such a way that it does not have enough energy to cause ignition of the potentially explosive gas mixture, even in a fault condition.

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