Vaisala HMP4 Relative Humidity & Temperature Probe
Aucontech Co Ltd
10 out of
10
- 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
- Modbusâ RTU over RS-485
- Compatible with Indigo transmitters and Insight PC software
- Traceable calibration certificate: 6 points for humidity, 1 point for temperature
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.
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.
Dimensions
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.
| 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) |
| Temperature | |
| Measurement range | −70 … +180 °C (−94 … +356 °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) |
| Sensor | Pt100 RTD Class F0.1 IEC 60751 |
| 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. |
|
| Operating Environment | |
| Operating temperature of probe body | −40 … +80 °C (−40 … +176 °F) |
| Operating temperature of probe head | −70 … +180 °C (−94 … +356 °F) |
| Operational pressure | < 100 bar |
| Operating environment | Suitable for outdoor use |
| Measurement environment | For air, nitrogen, hydrogen, argon, helium, oxygen, and vacuum 1) |
| IP rating of probe body | IP66 |
| 1) Consult Vaisala if other chemicals are present. Consider safety regulations with flammable gase. | |
| 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 |
| Fitting body | M22×1.5 or NPT1/2” |
| Weight | 530 g (18.7 oz) |
| Materials | |
| Probe | AISI 316 |
| Probe body | AISI 316 |
| Cable jacket | FEP |
| Accessories | |
| Indigo USB adapter 1) | USB2 |
| 1) Vaisala Insight software for Windows available at www.vaisala.com/insight | |
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