Model HFP01 Soil Heat Flux Plate
Weight (w/o cable):
200 g (7.05 oz)
Sensor:
Thermopile
Measurement Range:
±
2000 W m
-2
Sensitivity (nominal):
50
μ
V W
-1
m
-2
Expected Typical Accuracy
(12 hour totals):
within -15% to +5% in most common soils
Nominal Resistance:
2
W
Sensor Thermal Resistance:
<6.25 x 10
-3
Km
2
W
-1
2 cm
6 cm
8 cm
Ground Surface
Up to 1 m
2.5 cm
Partial emplacement of the HFP01 and the TCAV
sensors is shown for illustration purposes. All
sensors must be completely inserted into the soil face
before the hole is backfilled.
FIGURE 6-1. Placement of heat flux plates
6. Installation
6.1 Placement in Soil
The standard set of sensors for measuring soil heat flux includes two HF01
Soil Heat Flux Plates, one TCAV Averaging Soil Thermocouple, and one
CS616, CS650, or CS655 water content reflectometer. These sensors are
installed as shown in Figure 6-1.
The location of the heat flux plates and thermocouple should be chosen to be
representative of the area under study. If the ground cover is extremely varied,
an additional set of sensors is required to provide a valid soil heat flux average.
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