The HMP155A is an air temperature and relative humidity (RH) sensor that provides reliable measurements for a wide range of applications. It can be used as part of a weather station system or as a single instrument. It replaces the HMP45C, which is still available but will be retired in late 2010. It uses the 41005-5 radiation shield, which is different from the one use by the HMP45C.

Specifications

Electromagnetic Compatibility: Complies with EMC standard EN61326-1 Electromagnetic
Filter: Sintered PTFE
Housing
Material: PC
Classification: IP66
Voltage Output: 0 to 1 Vdc
Average Current Consumption: ≤3 mA (analog output mode)
Operating Voltage: 7 to 28 VDC
Settling Time at Power Up: 2 seconds

Relative Humidity (RH)

Sensor: HUMICAP®180R
Measurement Range: 0.8 to 100% RH, non-condensing
Response Time*: 20 s (63% RH), 60 s (90% RH)
Factory Calibration Uncertainty (+20°C)**
0 to 40% RH: ±0.6% RH
40 to 97% RH: ±1.0% RH
Accuracy (including non-linearity, hysteresis & repeatability)
+15° to +25°C: ±1% RH (0 to 90% RH) ±1.7% RH (90 to 100% RH)
-60° to -40°C: ± (1.4 + 0.032 × reading) % RH
-40° to -20°C: ± (1.2 + 0.012 × reading) % RH
-20° to +40°C: ± (1.0 + 0.008 × reading) % RH
+40° to +60°C: ± (1.2 + 0.012 × reading) % RH

Air Temperature

Temperature Sensor: Pt 100 RTD 1/3 class B IEC 751
Measurement Range: -80° to +60°C
Accuracy with Voltage Output
-80° to +20°C: ±(0.226 - 0.0028 x temperature)°C
-80° to +60°C: ±(0.055 - 0.0057 x temperature)°C
Entire Temperature Range: see graph in product brochure
*The response time for the RH specification is for the HUMICAP®180R© at 20°C in still air with sintered PTFE filter.
**The factory calibration uncertainty is defined as ±2 standard deviation limits. Small variations possible; see also calibration certificate.

Producing Area:USA