Second class pyranometer with 4-20 mA transmitter
LP02-TR is a solar radiation sensor that is applied in most common solar radiation observations. The pyranometer houses a 4-20 mA transmitter for easy read-out by dataloggers commonly used in the industry. It complies with the second class specifications of the ISO 9060 standard and the WMO Guide. LP02-TR pyranometer is widely used in (agro-)meteorological applications and for PV system performance monitoring.
LP02-TR measures the solar radiation received by a plane surface from a 180o field of view angle. This quantity, expressed in W/m2 , is called “hemispherical” solar radiation. The pyranometer can be employed outdoors under the sun, as well as indoors with lamp-based solar simulators. Its orientation depends on the application and may be horizontal, tilted (for plane of array radiation) or inverted (for reflected radiation). LP02-TR is a very good alternative to silicon cell (photodiode-based) pyranometers, which do not comply to the ISO 9060 standard.
Applicable instrument classification standards are ISO 9060 and WMO-No. 8. Calibration is according to ISO 9847. PV related standards are ASTM E2848 and IEC 61724.
Using LP02-TR is easy. The pyranometer can be connected directly to commonly used data logging systems. The irradiance in W/m2 is calculated by using the transmitter’s output. In LP02-TR’s standard configuration, the 4 to 20 mA output corresponds to a transmitted range of 0 to 1600 W/m2. This range can be adjusted at the factory upon request.
LP02-TR pyranometer design
LP02-TR employs a thermal sensor sensor with black coating, a single glass dome and an anodised aluminium body, which also houses the transmitter.
- longer cable, in multiples of 5 metres
- sun screen
- adapted transmitted range
- general meteorlogical observations
- agricultural networks
- PV system performance monitoring
Use as a sunshine duration sensor
WMO has approved the “pyranometric method” to calculate sunshine duration from pyranometer measurements in WMO-No. 8, Guide to Meteorological Instruments and Methods of Observation. This implies that LP02-TR may be used, in combination with appropriate software, to estimate sunshine duration. This solution is much more cost-effective than using a dedicated sunshine duration sensor. Ask for our application note.
- all pyranometers in our complete product range of solar sensors
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- hemispherical solar radiation
- ISO classification
- second class pyranometer
- Calibration uncertainty
- < 1.8 % (k = 2)
- Spectral range (50 % transmission points)
- 300 to 2800 x 10-9 m
- Transmitted range
- 0 to 1600 W/m2
- Rated operating temperature range
- -40 to +80 °C
- Temperature response
- < ± 3 % (-10 to +40 °C)
- Standard cable length
- 5 m