The HMP45C is a rugged, accurate temperature/RH probe manufactured by Vaisala Inc. The probe uses a HUMICAP capacitive polymer H chip to measure relative humidity over the 0 to 100% RH range. A PRT measures temperature over the -40° to +60°C range.
To reduce the current drain, power can be supplied to the HMP45C only during measurement when the sensor is connected to the datalogger's switched 12 V terminal. Dataloggers that do not have a switched 12 V terminal, such as the CR510 or CR7, can use the SW12V Switched 12 V device to switch power to the sensor only during measurement.Yearly HMP45C recalibrations are recommended.
The HMP45C is a rugged, accurate temperature and relative humidity probe. The sensor measures relative humidity over the 0 to 100% RH range and temperature over the -40° to +60°C range. All Campbell Scientific dataloggers are compatible with the HMP45C.
| Campbell Scientific, Inc. | Campbell Scientific, Inc. | |
|---|---|---|
| Product Category | RTD Temperature Probes | Temperature Probes |
| Product Number | HMP45C-L | HMP45C-L |
| Product Name | Temperature and RH Probe | Temperature and Relative Humidity Probe |
| Sensed Temperature | -38.56 to 140 F (-39.2 to 60 C) | -40 to 140 F (-40 to 60 C) |
| Reference Resistance | 1000 Ohms | |
| Element Configuration | Single Element | Single Element |
| Probe Configuration | Straight Probe | Straight Probe |
| Diameter or Width Range | 1 inch (25.4 mm) |
