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Relative Humidity and Temperature Probe HMP4

for high pressures

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DNV - Type Approved Product


Vaisala HUMICAP® Humidity and Temperature Probe HMP4 is designed for high-pressure applications such as compressed air systems in maritime, breathing air, and industrial applications, where measurement performance and chemical tolerance are essential. The HMP4 is part of the Indigo product family and compatible with Indigo500 and Indigo200 series transmitters and free Insight PC Software.

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Features

  • RH accuracy up to 0.8 %RH, Temperature accuracy up to 0.1 °C (0.18 °F)
  • Temperature measurement range -70 ... +180 °C (-94 ... +356 °F)
  • Operating pressure 0 ... 10 MPa (0 ... 100 bar)
  • Sensor purge provides superior chemical resistance
  • Modbus RTU over RS-485
  • Plug & play compatible with Indigo™ series of transmitters
  • Traceable calibration certificate: 5 points for humidity, 1 point for temperature

Key benefits

Proven Vaisala HUMICAP performance

Vaisala is the original innovator of the thin-film capacitive humidity measurement technology, which has now become the industry standard in humidity measurement.

Chemical purge minimizes effects of contaminants

In environments with high concentrations of chemicals and cleaning agents, the chemical purge option helps to maintain measurement accuracy between calibration intervals.

Flexible connectivity

The probe is plug and play compatible with Vaisala Indigo series transmitters, can be used as a standalone digital Modbus RTU transmitter, or connected to Vaisala Insight™ PC Software.

Indigo Selector

Discover your ideal Indigo compatible probe and transmitter combinations with the Indigo Selector tool.

Indigo Selector

Product documentation

Datasheets User guides More on Docs.vaisala.com

More downloads

Further reading

Tool

Indigo Selector

Discover your ideal Indigo compatible probe and transmitter combinations with the Indigo Selector tool.

 Learn more

Calculator

Humidity Calculator

Vaisala Humidity Calculator makes your complex humidity calculations and conversions easy. It covers all popular parameters and is effortless to use. Calculate several humidity parameters based on only one known value and tolerance.

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Blog

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Learn about the benefits of using two probes measuring either the same parameter or two different ones.

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Environmental measurement devices are also becoming smart. Unlike in the past when measurement probes could not be used on their own, the new wave of smart measurement probes can operate independently without additional transmitters. 

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