HMP155A-L Temperature & Relative Humidity Probe
To reduce the current drain, power can be supplied to the HMP155A only during measurement when the sensor is connected to the data logger’s switched 12 V terminal. Data loggers 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.
Benefits and Features
- Well-suited for long-term, unattended applications
- Accurate and rugged
- Mounts to a mast, cross-arm, or user-supplied pole
- Compatible with most Campbell Scientific data loggers
The HMP155A provides reliable relative humidity (RH) and temperature measurements for a wide range of applications. It uses a HUMICAP®180R capacitive thin film polymer sensor to measure RH over the 0 to 100% RH range. A PRT measures temperature over the -80° to +60°C range. This rugged, accurate temperature/RH probe is manufactured by Vaisala.
- An air temperature and relative humidity (RH) sensor that provides reliable measurements for a wide range of applications.
- Can be used as part of a weather station system or as a single instrument.
- Replaces the HMP45C, which is still available but will be retired in late 2010.
- Uses the 41005-5 radiation shield, which is different from the one used by the HMP45C.
| Electromagnetic Compatibility | Complies with EMC standard EN61326-1 Electromagnetic |
| Filter Description | Sintered PTFE |
| Housing Body Material | PC |
| Housing Classification | IP66 |
| Voltage Output | 0 to 1 Vdc |
| Average Current Consumption | ≤ 3 mA (analog output mode) |
| Operating Voltage | 7 to 28 Vdc |
| Settling Time | 2 s (at power up) |
| Field-Replaceable Chip or Recalibrate | Recalibrate |
| Tip Diameter | 1.2 cm (0.5 in.) |
| Length | 27.9 cm (11 in.) |
| Head Height | 4 cm (1.6 in.) |
| Body Height | 2.4 cm (0.9 in.) |
| Body Width | 2.0 cm (0.8 in.) |
Relative Humidity |
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| Sensing Element | HUMICAP 180R |
| Measurement Range | 0 to 100% RH (non-condensing) |
| Response Time |
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| Factory Calibration Uncertainty |
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| Accuracy |
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Air Temperature |
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| Sensing Element | PT 100 RTD 1/3 class B IEC 751 |
| Measurement Range | -80° to +60°C |
| Accuracy |
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| Entire Temperature Range | Refer to graph in probe manual. |
