Vaisala HMP3 Humidity & Temperature Probe

Features

  • RH accuracy up to 0.8 %RH and temperature accuracy up to 0.1 °C (0.18 °F).
  • Temperature measurement range -40 … +120 °C (-40 … +248 °F).
  • Compatible with Indigo series transmitters.
  • PPS plastic grid filter with stainless steel mesh delivered as standard.
  • Modbus RTU over RS-485 for flexible connectivity.
  • Includes traceable calibration certificate.
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Vaisala Temperature Probe HMP3 and Vaisala HUMICAP Humidity is a general-purpose probe designed for processes with moderate humidity and temperature levels. It’s great for places like industrial HVAC systems, paint booths, clean rooms, and environmental chambers, where occasional recalibration isn’t enough for upkeep. HMP3 is part of the Indigo family and works with Indigo500 and Indigo200 series transmitters. You can also use Vaisala Insight PC software for data visualization, simple probe setup, and field calibration.

Dimensions

Key Benefits

For general purpose humidity and temperature processes

Vaisala HMP3 probe is versatile and ideal for many industrial uses with moderate humidity and temperature. It uses Vaisala’s advanced thin-film capacitive humidity measurement technology, which is widely recognized as the industry standard. With Vaisala’s HUMICAP technology, it ensures excellent stability, quick response times, and minimal hysteresis across various applications.

Exchangeable sensor with several filter options

The design is ideal for a range of operating environments and allows for flexible field maintenance. The filter and sensor element are field-exchangeable for applications which require frequent replacements. Filters suitable for the Vaisala HMP3 include stainless-steel 12 µ mesh filters (for applications such as air control units), sintered stainless-steel filters (for applications where maximum protection against dust ingress is essential), and PPS plastic grid filters for improved humidity response time.

Use standalone or with an Indigo Transmitter

Vaisala HMP3 is smart and versatile, with built-in intelligence and a digital Modbus RTU over RS-485 connection. It can function independently or seamlessly integrate into other systems. As part of the Vaisala Indigo family, it works with Vaisala Indigo series transmitters, offering benefits like data visualization, easy probe configuration, and more connectivity options. Whether used alone or with an Indigo transmitter, it can be connected to Vaisala Insight software for simple field calibration, probe configuration, and device analytics.

 

Dpstar is a leading supplier of environmental measurement sensors for temperature, relative humidity, pressure, dew point, CO2, and other environmental condition monitoring for industrial process application and research. Since the ’90s, we earned a reputation as a trusted partner to our clients through our commitment and dedication. We are an authorized distributor and supplier of measuring sensors solutions from renowned manufacturers Vaisala. Vaisala is a global leader in environmental and industrial measurement. Building on 80 years of experience, Vaisala provides observations for a better world. Vaisala is a reliable partner for customers around the world, offering a comprehensive range of innovative observation and measurement products and services.

Specification

Measurement Performance
Relative Humidity
Measurement range 0 … 100 %RH
Accuracy at +23 °C (+73.4 °F) 1) ±0.8 %RH (0 … 90 %RH)
Factory calibration uncertainty 2)  ±0.5 %RH (0 … 40 %RH)
±0.8 %RH (40 … 95 %RH)
T63 response time 15 s
Sensor options HUMICAP R2
HUMICAP R2C 3)
HUMICAP 180VC 3) 4)
Temperature
Sensor Pt100 RTD Class F0.1 IEC 60751
Measurement range −40 … +120 °C (−40 … +248 °F)
Accuracy 1) ±0.1 °C (±0.18 °F)
Factory calibration uncertainty 2) ±0.1 °C (±0.18 °F) at +23 °C (+73.4 °F)
1) Defined against calibration reference. Including non-linearity, hysteresis, and repeatability.
2) Defined as ±2 standard deviation limits. Small variations possible; see calibration certificate.
3) Chemical purge feature available with this sensor.
4) H2O2 resistant. With HUMICAP 180VC sensor, accuracy is not specified below −20 °C (−4 °F) operating temperature.
Operating environment
Operating temperature of probe head −40 … +120 °C (−40 … +248 °F)
Operating temperature of probe body −40 … +80 °C (−40 … +176 °F)
Storage temperature −40 … +80 °C (−40 … +176 °F)
Operating environment Suitable for outdoor use
Measurement environment For air, nitrogen, hydrogen, argon, helium, and oxygen 1)
IP rating of probe body IP66
1) Consult Vaisala if other chemicals are present. Consider safety regulations with flammable gases.
Inputs and Outputs
Operating voltage 15 … 30 V DC
Current consumption 10 mA typical, 500 mA max
Digital output RS-485, non-isolated
Protocols Modbus RTU
Output Parameters
Absolute humidity (g/m3) Relative humidity (%RH)
Absolute humidity at NTP (g/m3) Relative humidity (dew/frost) (%RH)
Dew point temperature (°C) Temperature (°C)
Dew/frost point temperature (°C) Water concentration (ppmv)
Dew/frost point temperature at 1 atm (°C) Water concentration (wet basis) (vol %)
Dew point temperature at 1 atm (°C) Water mass fraction (ppmw)
Dew point temperature difference (°C) Water vapor pressure (hPa)
Enthalpy (kJ/kg) Water vapor saturation pressure (hPa)
Mixing ratio (g/kg) Wet-bulb temperature (°C)
Compliance
EU directives EMC Directive (2014/30/EU)
RoHS Directive (2011/65/EU)
EMC compatibility EN 61326 1, industrial environment
Type approvals DNV GL certificate no. TAA00002YT
Compliance marks CE, China RoHS, RCM, WEEE
Mechanical Specifications
Connector M12 5-pin A-coded male
Weight 302 g (10.65 oz)
Materials
Probe AISI 316L
Probe body AISI 316L
Cable jacket FEP
Accessories
Duct installation kit 210697
Solar radiation shield DTR502B DTR502B
Indigo USB adapter 1) USB2
1) Vaisala Insight software for Windows available at www.vaisala.com/insight

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Vaisala HMP3 Series Humidity & Temperature Probe_DpstarGroup

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