HMP155 Humidity and Temperature Probe

Performance

RELATIVE HUMIDITY

Measurement range 0 … 100 %RH
Accuracy (incl. non-linearity, hysteresis
and repeatability) at
+15 … +25 °C (+59 … +77 °F) ±1 %RH (0 … 90 %RH)
±1.7 %RH (90 … 100 %RH)
-20 … +40 °C (-4 … 104 °F) ±(1.0 + 0.008 x reading) %RH
-40 … -20 °C (-40 … -4 °F) ±(1.2 + 0.012 x reading) %RH
+40 … +60 °C (+104 … +140 °F) ±(1.2 + 0.012 x reading) %RH
-60 … -40 °C (-76 … -40 °F) ±(1.4 + 0.032 x reading) %RH
Factory calibration
uncertainty (+20 °C /+68 °F)
±0.6 %RH (0 … 40 %RH)*
±1.0 %RH (40 … 97 %RH)*
* Defined as ±2 standard deviation limits. Small variations possible,
see also calibration certificate.
Recommended humidity sensor HUMICAP®180R(C)
Response time at +20 °C in still air with
a sintered PTFE filter
63 % 20 s
90 % 60 s

TEMPERATURE

Measurement range -80 … +60 °C (-112 … +140 °F)
Accuracy with voltage output at
-80 … +20 °C ±(0.226 – 0.0028 x temperature) °C
+20 … +60 °C ±(0.055 + 0.0057 x temperature) °C
passive (resistive) output
according to IEC 751
1/3 Class B
±(0.1 + 0.00167 x |temperature|)°C
RS485 output
-80 … +20 °C ±(0.176 – 0.0028 x temperature) °C
+20 … +60 °C ±(0.07 + 0.0025 x temperature) °C
Accuracy over temperature range (opposite)
Temperature sensor Pt100 RTD 1/3 Class B IEC 751
Response time with additional temperature
probe in 3 m/s air flow
63 % <20 s
90 % <35 s
OTHER VARIABLES
dewpoint/frost point temperature,
wet bulb temperature, mixing ratio

General

Operating temperature range -80 … +60 °C (-112 … +140 °F)
Storage temperature range -80 … +60 °C (-112 … +140 °F)
Connection 8-pin male M12 connector
Connection cables 3.5, 10, and 30 m
Cable material PUR
Wire size AWG26
Service cables USB connection cable
MI70 connection cable
Additional T probe cable length 2 m
Housing material PC
Housing classification IP66
Sensor protection sintered PTFE
optional membrane filter
Weight (probe) 86 g
Electromagnetic compatibility: Complies with the EMC standard
EN61326-1, Electrical equipment for measurement control and
laboratory use – EMC requirement for use in industrial locations

Inputs and Outputs

Operating voltage 7 … 28 VDC*
*Note: minimum operating voltage 12 V with 0 … 5 V output
and 16 V with 0 … 10 V output, probe heating, chemical purge or
XHEAT.
Outputs
voltage output 0 … 1 V, 0 … 5 V, 0 … 10 V
resistive Pt100 (4-wire connection)
RS485
Average current consumption
(+15 VDC, load 100 kOhm)
0 … 1 V output <3 mA
0 … 10 V output +0.5 mA
RS485 <4 mA
during chemical purge max. 110 mA
with warmed probe max. 150 mA
Settling time at power-up
voltage output 2 s
RS485 3 s