Specifications
IR02-TR
| Measurand | longwave radiation |
| Optional measurand | sky temperature, surface temperature |
| Spectral range | 4.5 to 42 x 10⁻⁶ m |
| Field of view angle | 150 ° |
| Response time (95%) | 18 s |
| Rated operating temperature range | -40 to +80 °C |
| Transmitted range | -300 to 100 W/m² |
| Temperature dependence | < ± 3 % (-10 to +40 °C) |
| Calibration traceability | to WISG |
| Optional traceability | to blackbody (ITS-90) |
| Heater | 12 VDC, 1.5 W |
| Temperature sensor | Pt100 |
| Standard cable length | 5 m (see options) |
Options
- longer cable, in multiples of 5 metres
- blackbody calibration (ITS-90)
- adapted transmitted range
- IR02 version without transmitter
Downloads
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IR02-TR pyrgeometer with heater
IR02-TR measures the longwave or far-infra-red radiation received by a plane surface, in W/m², from a field of view angle of approximately 150°. Longwave radiation is the part of radiation that is not emitted by the sun. The actual field of view angle of IR02-TR is not the ideal 180°. The reduction of this field of view makes it possible to offer an instrument at an attractive price level, while the accuracy loss is relatively small. IR02-TR has a window with a cut-on at 4.5 x 10⁻⁶ m, making it suitable for day- and night observations.
Operation
Using IR02-TR is easy. The pyrgeometer can be connected directly to commonly used data logging systems. The irradiance in W/m² is calculated by using the transmitter’s output and the temperature reading. The final result is calculated taking into account the irradiance radiated by the sensor itself (Stefan-Boltzmann law). In IR02-TR’s standard configuration, the 4 to 20 mA output corresponds to a transmitted range of -300 to +100 W/m² . This range can be adjusted at the factory upon request.
IR02-TR Design
IR02-TR pyrgeometer employs a thermal sensor with black coating, a flat silicon window with solar blind filter and an anodised aluminium body. IR02-TR houses an on-board heater. Heating prevents condensation of water on the pyrgeometer window which, when occurring, leads to very large measurement errors. IR02-TR has a high sensitivity. With the transmitter a typical datalogger no longer contributes to the uncertainty of the measurement.
Suggested use
- general meteorological observations
- climatological networks
- agricultural warning networks (frost)
Areas of Application
IR02-TR pyrgeometer
- suitable for day- and night observations
- on-board heater. Heating prevents condensation of water on the pyrgeometer window which, when occurring, leads to very large measurement errors.
- high sensitivity
