열유속
측정센서
HEAT
FLUX PLATE (HFP-01-ATX)
HFP-01-ATX Heat flux plate
The HFP-01-ATX heat flux plate (also called heat flux
sensor) offers a solution for measuring heat fluxes. It is especially designed
for use inside walls and inside the soil. See also the scientific section on heat flux.
HFP-01-ATX serves to measure the heat that flows
through the object in which it is incorporated or on which it is mounted. The
actual sensor in HFP-01-ATX is a thermopile. This thermopile measures the
differential temperature across the ceramics-plastic composite body of HFP-01-ATX.
Working completely passive, HFP-01-ATX generates a small output voltage proportional
to the local heat flux.
- Figure 1 HFP-01-ATX heat
flux plate dimensions:
- (1) sensor area, (2) guard of
ceramics-plastic composite, (3) cable, standard length is 5 m.
All
dimensions are in mm.
-
Using HFP-01-ATX is easy. For readout one only
needs an accurate voltmeter that works in the millivolt range. To calculate the
heat flux, the voltage must be divided by the sensitivity; a constant that is
supplied with each individual instrument.
HFP-01-ATX can be used for in-situ measurement of
building envelope thermal resistance (R-value) and thermal transmittance
(H-value) according to ISO 9869, ASTM C1046 and ASTM 1155 standards.
Traceability of calibration is to the
“guarded hot plate” of National Physical Laboratory (NPL) of the UK, according
to ISO 8302 and ASTM C177.
A typical measurement location is equipped
with 2 sensors for good spatial averaging. If necessary two sensors can be put
in series, creating a single output signal.
If measuring in soil, in case a more
accurate measurement is needed the model HFP-01-ATXSC should be
considered.
See
also models HFP03 and the PU series.
SUGGESTED
USE
Meteorology, building physics, H-value and
R-value determination, building climate control
HFP-01-ATX SPECIFICATIONS
-
Sensitivity (nominal): 50 µV/
Wm-2
-
Resistance (nominal): 2
W
-
Temperature range: -30 to +70
°C
-
Sensor
thermal resistance: <
6.25 10 -3
Km2/W
-
Range: +2000 to -2000
Wm-2
-
Calibration trace ability: NPL, ISO 8302 / ASTM C177
-
Expected typical accuracy (12 hr totals): within +5%/-15% in most
common soil, within +5%/-5% on walls
OPTIONS
Additional cable length x
metres (add to 5m), AC100 amplifier, LI 18 hand held readout.
|