NR01 Four-Component Net Radiation Sensor
6
TABLE 5-3. Pyrgeometer Specifications
Sensor
IR01 pyrgeometer
Overall classification
according to ISO / WMO
Not applicable
Response time for 95 %
response
18 s
Window heating offset
(response to 1000 W/m
2
net
thermal radiation)
< 15 W/m
2
Zero offset b (response to 5
k/h change in ambient
temperature)
< 4 W/m
2
Non-Stability
< 1% change per year
Non-Linearity
< ± 2.5%
Field of view
150 degrees
Spectral selectivity
Not specified
Temperature response
(within an interval of 50 °C)
Within 6% (–10 to 40 °C)
Tilt response
Within ± 2%
Sensitivity
5 – 15 μV/Wm
-2
Expected voltage output
Meteorological application: –5 to 5 mV
Sensor resistance
Between 100 and 400 Ohms
Power required
Zero (passive sensor)
Range
To 1000 Wm
–2
Spectral range
4500 to 50000 nm (50% transmission points)
Required programming
Φ = U / E (in case of net radiation only)
Φ = (U / E) + 5.67.10
-8
T
4
(absolute radiation),
with T from PT100 measurement
Expected accuracy for daily
sums
± 10%
Calibration traceability
International temperature standard
