Vaisala Hmp4 Probe Relative Humidity and Temperature Probe Industrial Measurement Transmitter

• Customization: Available
• Installation Type: Wall-Mounted Type
• Measuring Medium: Humidity and Temperature
• Model NO.: HMP4
• IP Rating: IP66
• Certification: CE
• Customized: Non-Customized
• Operating Voltage: 15-30 V DC
• Digital Output: RS-485
• Operational Pressure: < 100 Bar
• IP Rating of Probe Body: IP66
• Protocols: Modbus RTU
• Transport Package: Export Carton
• Specification: 530g
• Trademark: Vaisala
• Origin: Finland
• Production Capacity: 10000 PCS Per Year
• Package Size: 25.00cm * 10.00cm * 6.00cm
• Package Gross Weight: 0.600kg

Product Description

 

 

Product Description

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.

Features

1. RH accuracy up to ±0.8 %RH
 

2. Temperature accuracy up to ±0.1 °C (±0.18 °F)
 

3. Temperature measurement range −70 … +180 °C (−94 … +356 °F)
 

4. Operating pressure 0 … 10 MPa (0 … 100 bar)
 

5.  Sensor purge improves long-term stability and chemical resistance
 

6.  Modbusâ RTU over RS-485
 

7. Compatible with Vaisala Indigoproducts and Insight PC software
 

8. Traceable calibration certificate: 6 points for humidity, 1 point for temperature

Sensor purge minimizes effects of contaminants

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

The sensor purge involves heating the sensor to remove harmful chemicals. The function can be initiated manually or programmed to occur at set intervals.

Flexible connectivity

The probe can be used as a standalone digital Modbus RTU transmitter over an RS-485 serial bus, and it can also be connected to Indigo transmitters and the Indigo80 handheld indicator. For easy-to-use access to field calibration, device analytics, and configuration functionality, the probe can be connected to Vaisala Insight software for Windows.
 

Product Parameters

Measurement performance

Relative humidity
Measurement range	0 … 100 %RH
Accuracy at +23 °C (+73.4 °F)	±0.8 %RH (0 … 90 %RH)
Factory calibration uncertainty	±0.5 %RH (0 … 40 %RH) ±0.8 %RH (40 … 95 %RH)
response time	15 s
Sensor options	HUMICAPâ R2 HUMICAPâ R2C
Temperature
Measurement range	−70 … +180 °C (−94 … +356 °F)
Accuracy	±0.1 °C (±0.18 °F)
Factory calibration uncertainty	±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) Sensor purge feature available with this sensor.
 

 

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 di‡erence (°C)	Water vapor pressure (hPa)
Enthalpy (kJ/kg)	Water vapor saturation pressure (hPa)
Mixing ratio (g/kg)	Wet-bulb temperature (°C)

Detailed Photos

 

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