The SEN-R PRO HMP45A is Vaisala's top of the line sensor. It conforms to the strictest meteorological requirements, in particular with respect to measuring relative humidity. Calibrated against factory references it can acheive accuracies of +2%rH in the critical range between 90% rH and 100% rH.
The Humicap® 180 sensing element is protected by a plastic cap and can easily be replaced. Maintenance is straightforward, and should field calibration be required the instrument can simply be taken apart and checked by means of Vaisala's Humicap® HMI41 Humidity Indicator.
Technical Specifications
Wind Speed
| Supply Voltage |
7 - 35 VDC |
| Current consumption |
< 4mA |
| Operating Temperature |
-40°C - 60°C
-40°F - 140°F |
| Operating Humidity |
0 ... 100% rH |
| Housing Material |
ABS |
| Protection |
IP65 |
| Connection |
open ended |
Relative Humidity
| Measuring Range |
0.8 - 100% rH |
| Sensor Element |
Humicap® 180 |
Accuracy at +20 °C
from 0 - 90% rH
from 90% - max. rH |
+ 2% rH
+ 3% rH |
| Temperature dependence |
+ 0.05% rH / °C |
| Long-term Stability |
<1% rH per year |
| Output Signal |
0 - 1V |
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| Quantity |
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