HFP01 and HFP01SC Heat Flux Sensors Brochure - Campbell ...
HFP01 and HFP01SC Heat Flux Sensors Brochure - Campbell ...
HFP01 and HFP01SC Heat Flux Sensors Brochure - Campbell ...
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<strong>HFP01</strong> <strong>and</strong> <strong>HFP01</strong>SC<strong>Heat</strong> <strong>Flux</strong> <strong>Sensors</strong>Both the <strong>HFP01</strong> <strong>and</strong> <strong>HFP01</strong>SC provide soil heat fluxmeasurements—typically for energy balance or Bowenratio flux systems. These heat flux sensors are manufacturedby Hukseflux (Delft, The Netherl<strong>and</strong>s) for<strong>Campbell</strong> Scientific, <strong>and</strong> are compatible with most ofour dataloggers. They are not compatible with ourCR200(X)-series dataloggers.The <strong>HFP01</strong> <strong>and</strong> <strong>HFP01</strong>SC output a voltage signal thatis proportional to the heat flux of the surrounding medium.At least, two sensors are required for each siteto provide spatial averaging. Sites with heterogeneousmedia may require additional sensors.The <strong>HFP01</strong>SC is a self-calibrating version of the <strong>HFP01</strong>.It self-calibrates using the Van den Bos-Hoeksmamethod; an internal heater is included for this process.Self-calibration corrects for errors due to differencesin thermal conductivity between the sensor <strong>and</strong> surroundingmedium, temperature variations, <strong>and</strong> slightsensor instabilities.HEATHUKSEFLUXFLUXPLATEThe <strong>HFP01</strong>SC Self-Calibrating <strong>Heat</strong><strong>Flux</strong> Sensor is intendedfor applicationsrequiring thehighest possibledegree of measurementaccuracy.HEAUp to 1 m2.5 cm2 cmGround Surface6 cm 8 cmThe above illustration shows heat flux sensors installed with the CS616 <strong>and</strong> TCAV Averaging Soil Temperature Probes. All sensors mustbe completely inserted into the soil face before the hole is backfilled.
Ordering Information<strong>Heat</strong> <strong>Flux</strong> <strong>Sensors</strong>Recommended cable length is 25, 50, 75, or 100 ft (8, 15, 23, or 31 m).<strong>HFP01</strong>-L<strong>HFP01</strong>SC-LHukseflux Soil <strong>Heat</strong> <strong>Flux</strong> Plate with user-specified cablelength; enter cable length, in feet, after the -L. Mustchoose a cable termination option (see below).Hukseflux Self-Calibrating Soil <strong>Heat</strong> <strong>Flux</strong> Plate withuser-specified cable length; enter cable length, infeet, after the -L. Must choose a cable terminationoption (see below).Cable Termination Options (choose one)-PT-PW-CWSCable terminates in stripped <strong>and</strong> tinned leads fordirect connection to a datalogger’s terminals.Cable terminates in a connector for attachment to aprewired enclosure.<strong>HFP01</strong> cable terminates in a connector for attachmentto a CWS900 interface. Connection to aCWS900 interface allows the <strong>HFP01</strong> to be used ina wireless sensor network. This option is only forthe <strong>HFP01</strong> (not the <strong>HFP01</strong>SC).The <strong>HFP01</strong> is for applications that do not require self calibration.SpecificationsSensitivity (nominal): 50 μV W -1 m -2Nominal Resistance:Temperature Range:Plate Thickness:Plate Diameter:Weight (w/o cable):<strong>HFP01</strong>Sensor:2 ohms-30° to +70°C5 mm (0.20 in.)80 mm (3.15 in.)200 g (7.05 oz)ThermopileRange: ±2000 W m -2Sensor Thermal Resistance:
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