Vaisala HMP3 - Table 11 Operating Environment; Table 12 Inputs and Outputs; Table 13 Mechanical Specifications

Table 11 Operating environment
Property Description/value
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
EMC compatibility EN61326-1, industrial environment
1) Consult Vaisala if other chemicals are present. Consider safety regulations with flammable
gases.
Table 12 Inputs and outputs
Property Description/value
Operating voltage 15 … 30 VDC
Current consumption 10 mA typical, 500 mA max.
Digital output RS-485, non-isolated
Protocols Modbus RTU
Output Parameters
Relative humidity, temperature, dew point temperature, wet-bulb temperature, absolute humidity,
mixing ratio, water concentration, water mass fraction, water vapor pressure, enthalpy
Table 13 Mechanical specifications
Property Description/value
Connector M12 5-pin A-coded male
Fitting body M22×1.5 or NPT1/2”
Weight 530 g (18.7 oz)
Materials
Probe AISI316
Probe body AISI316
Cable jacket FEP
HMP3, HMP4, HMP5, HMP7, HMP8, HMP9, MMP8, TMP1 User Guide M212022EN-D
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