Technical Data

HMP155 humidity measurement performance

Sensor

HUMICAPâR2, 180R and INTERCAP

for typical applications

HUMICAPâR2C, 180RC and

INTERCAPC for applications with

chemical purge and/or warmed probe

Observation range

0 … 100 %RH

Response time at +20 °C (+68 °F) in

still air with sintered Teflon filter

63 %: 20 s

90 %: 60 s

Factory calibration uncertainty at

+20 °C (+68 °F)1)

±0.6 %RH (0 … 40 %RH)

±1.0 %RH (40 … 95 %RH)

Accuracy (including non-linearity, hysteresis, and repeatability)

At +15 … +25 °C (+59 … +77 °F)

±1 %RH (0 … 90 %RH)

±1.7 %RH (90 … 100 %RH)

At −20 … +40 °C (−4 … +104 °F)

±(1.0 + 0.008 × reading) %RH

At −40 … −20 °C (−40 … −4 °F)

±(1.2 + 0.012 × reading) %RH

At +40 … +60 °C (+104 … +140 °F)

±(1.2 + 0.012 × reading) %RH

At −60 … −40 °C (−76 … −40 °F)

±(1.4 + 0.032 × reading) %RH

1)

Defined as ±2 standard deviation limits. Small variations possible (see also the calibration certificate).

HMP155 temperature measurement performance

Sensor

Pt100 RTD element, Class F 0.1

IEC 60751

Observation range

−80 … +60 °C (−112 … +140 °F)

Response time for additional

temperature probe in 3 m/s (7 mph) air

flow

63 %: < 20 s

90 %: < 35 s

Other measured variables

Dew point / frost point temperature,

wet bulb temperature, mixing ratio

Accuracy with voltage output

At −80 … +20 °C (−112 … +68 °F)

±(0.226 - 0.0028 × temperature) °C

At +20 … +60 °C (+68 … +140 °F)

±(0.055 + 0.0057 × temperature) °C

Accuracy with passive (resistive) output

According to Tolerance Class AA

IEC 607511)

±(0.1 + 0.0017 × |temperature|) °C

Accuracy with RS‑485 output

At −80 … +20 °C (−112 … +68 °F)

±(0.176 - 0.0028 × temperature) °C

At +20 … +60 °C (+68 … +140 °F)

±(0.07 + 0.0025 × temperature) °C

1)

Tolerance Class AA IEC 60751 corresponds to IEC 751 1/3 Class B

HMP155 accuracy over temperature range: voltage and

RS‑485

HMP155 operating environment

Operating temperature for humidity

measurement

−80 … +60 °C (−112 … +140 °F)

Storage temperature

−80 … +60 °C (−112 … +140 °F)

Operating humidity

0 … 100 %RH

IP rating

IP66

HMP155 inputs and outputs

Operating voltage

7 … 28 V DC

Minimum operating voltage

0 … 1 V output or RS‑485: 7 V

0 … 5 V output, or warmed probe:

12 V

0 … 10 V output, chemical purge, or

XHEAT: 16 V

Outputs

Voltage output: 0 … 1 V, 0 … 5 V,

0 … 10 V

Resistive Pt100 4‑wire connection

RS‑485

Average power consumption (+15 V DC,

load 100 kΩ)

0 … 1 V output: < 3 mA

0 … 10 V output: +0.5 mA

RS-485: < 4 mA

During chemical purge: Maximum

110 mA

With warmed probe: Maximum

150 mA

Settling time at startup

Voltage output: 2 s

RS-485: 3 s

HMP155 mechanical specifications

Dimensions (H × W)

279 × 40 mm (10.9 × 1.6 in)

Weight

93 g (3.25 oz)

Length of additional T‑probe cable

2 m (6 ft 7 in)

Connection

8-pin male M12 connector

Connection cables

3.5 m (11 ft 6 in), 10 m (32 ft 10 in),

30 m (98 ft 5 in)

Maximum wire size

0.129 mm2 (26 AWG)

Service cables

USB connection cable

MI70 connection cable

Materials

Filter

Sintered Teflon or membrane

Housing

Polycarbonate (PC)

Additional temperature probe

Stainless steel AISI 316L

Cable

PUR

24 [0.94]

86 [3.39]

279 [10.98]

266 [10.47]

mm

[in]

Dimensions in mm (inches)

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