Detail HUKSEFLUX – HFP01SC
Product Description
The HFP01SC self-calibrating heat flux sensor™ is a sensor intended for high accuracy measurement of soil heat flux. Also it offers improved quality assurance of the measurement. The on-line calibration (the Van den Bos-Hoeksema method) automatically corrects for various common errors, in particular those due to the non-perfect matching of the thermal conductivity of sensor and soil, and due to variations of the thermal conductivity of the soil caused by varying moisture content.
HFP01SC is a combination of a heat flux sensor and a film heater. The primary purpose is to estimate the heat flux through the surrounding soil. The HFP01SC output is a voltage signal that is proportional heat flux through the sensor. The film heater that is mounted on top can be activated to perform a calibration, resulting in a new calibration factor that compensates for the errors made under the circumstances of that moment. Implicitly also cable connection, data acquisition and data processing are tested. Also errors due to temperature dependence and instability of the sensor are eliminated. The result is a much improved accuracy & quality assurance of the measurement (relative to conventional models such as model HFP01).
Specification
- Measurand : heat flux
- On-line functionality testing : Selt-test including self-calibration
- Sensing area : 8 x 10-4 m2
- Sensor thermal resistance: 81 x 10-4 K/(W/m2)
- Measurement range : -2000 to 2000 W/m2
- Sensitivity (nominal) : 60 x 10-6 V/ (W/m2)
- Rated operating temperature : range -30 to +70 °C
- IP protection class : IP67
- Film heater resitance : 100 ohm ± 10%
- Film heater rated power supply : 9 to 15 VDC
- Interval between self-tests : 6 hr
- Heating interval duration : 180 s
- Power consumption daily average : 0.02 W
- Standard cable length : 2 x 5 m
- Options : longer cable length (10, 15, 20, 30, 40 m)
