HFP01
HFP01
OrderableSoil Heat Flux Plate
Pricing
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Configuration
- w/5m (17 ft) per Sensor-5mPart Number: 45185-5m
- w/10m (33 ft) per Sensor-10mPart Number: 45185-10m
- w/15m (50 ft) per Sensor-15mPart Number: 45185-15m
- w/20m (66 ft) per Sensor-20mPart Number: 45185-20m
- w/30m (100 ft) per Sensor-30mPart Number: 45185-30m
Select a configuration to add to your quote
- Model:
- HFP01
- Item Number:
- 45185
- Warranty:
- 1 year
Overview
The HFP01, manufactured by Hukseflux, measures soil heat flux, typically for energy-balance or Bowen-ratio flux systems. It outputs a voltage signal that is proportional to the heat flux of the surrounding medium. At least two sensors are required for each site to provide spatial averaging. Sites with heterogeneous media may require additional sensors.
Key Advantages
Ideal for energy-balance and Bowen-ratio systems
Technical Description
The HFP01 uses a thermopile to measure temperature gradients across its plate. Operating in a completely passive way, it generates a small output voltage that is proportional to this differential temperature. Assuming that the heat flux is steady, that the thermal conductivity of the body is constant, and that the sensor has negligible influence on the thermal flow pattern, the signal of the HFP01 is directly proportional to the local heat flux.
The HFP01’s output is in millivolts. To convert this measured voltage to heat flux, it must be divided by the plate’s calibration constant. A unique calibration constant is supplied with each sensor.
Note: In an energy-balance installation, all sensors must be completely inserted into the soil face before the hole is backfilled.
Benefits
- Compatible with most Campbell Scientific dataloggers
- Compatible with the CWS900-series interfaces, allowing it to be used in a wireless sensor network
Specifications
- Sensor Type
- Thermopile
- Sensitivity
- 50 μV W-1 m2
(nominal)
- Nominal Resistance
- 2 Ω
- Temperature Range
- -30° to +70°C
- Sensor Thermal Resistance
- < 6.25 x 10-3 K m2 W-1
- Measurement Range
- ±2000 W m-2
- Expected Typical Accuracy
- Within -15% to +5% in most common soils
(12 hour totals)
- Plate Diameter
- 80 mm
(3.15 in.)
- Plate Thickness
- 5 mm
(0.20 in.)
- Weight
- 200 g
(7.05 oz) without cable
Ships With
(1)- Calibration Sheet
