HMP9 specifications - HMP1 - HMP3 - HMP4 - HMP5 - HMP7 - HMP8 - HMP9 - HMPX - MMP8 - TMP1

HMP Series with MMP8 and TMP1 User Guide
Document code
M212022EN
Revision
J
Language
English
Product
HMP1
HMP3
HMP4
HMP5
HMP7
HMP8
HMP9
HMPX
MMP8
TMP1
Document type
User guide
Table 1. HMP9 measurement performance
Property Description/Value
Relative humidity
Measurement range 0 … 100 %RH, at max. +95 °C (203 °F) Td
Accuracy at +23 °C (+73.4 °F) 1 ±0.8 %RH (0 … 90 %RH)
Factory calibration uncertainty 2

±0.7 %RH (0 … 40 %RH)

±1 %RH (40 … 95 %RH)
Non-linearity 0.4 %RH
T63 response time 3 15 s
Sensor HUMICAP® I
Temperature
Measurement range −40 … +120 °C (−40 … +248 °F)
Accuracy at +23 °C (+73.4 °F) 1 ±0.1 °C (±0.18 °F)
Factory calibration uncertainty 2 ±0.1 °C (±0.18 °F) at +23 °C (+73.4 °F)
T63 response time 3

70 s
Figure 1. HMP9 humidity measurement accuracy as a function of temperature
Figure 2. HMP9 temperature measurement accuracy over full range
Table 2. HMP9 operating environment
Property Description/Value
Operating temperature of probe body −40 … +60 °C (−40 … +140 °F)
Operating temperature of probe head −40 … +120 °C (−40 … +248 °F)
Operating humidity of probe head Max. +100 °C (212 °F) Td
Storage temperature −40 … +60 °C (−40 … +140 °F)
Operating environment Suitable for outdoor use when protected from rain
Measurement environment

For air, nitrogen, hydrogen, argon, helium, and oxygen 4
IP rating of probe body

IP65: Dust-tight. Protected from water jets from any direction.
Table 3. HMP9 inputs and outputs
Property Description/Value
Operating voltage

15 … 30 V DC
Current consumption 5 mA typical, 400 mA max.
Digital output RS-485, non-isolated
Default serial settings 19200 bps N 8 2
Protocol Modbus RTU
Table 4. HMP9 output parameters
Output parameter name and unit
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)
Table 5. HMP9 compliance
Property Value/Description

EU directives and regulations

EMC Directive (2014/30/EU)

RoHS Directive (2011/65/EU) amended by 2015/863

Electromagnetic compatibility (EMC)

EN 61326‑1, industrial environment

Compliance marks

CE, China RoHS, RCM
Table 6. HMP9 mechanical specifications
Property Description/Value
Connector M12 5-pin A-coded male
Weight 68 g (2.40 oz)
Probe cable length 2 m (6.56 ft)
Materials
Probe AISI 316L
Probe body PBT
Cable overmolds FEP
Figure 3. HMP9 probe dimensions
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 In still air.
4

Consult Vaisala if other chemicals are present. Consider safety regulations with flammable gases.