SMP21 Secondary Standard Pyranometer
The SMP21 pyranometer is a secondary standard pyranometer that combines the sensor technology of the CMP21 with an RS-485 Modbus interface alongside analogue output. With internal desiccant and robust build quality, the SMP21 is very low maintenance.
- Spectral range (50% points)
- 285 to 2800 nm
- Sensitivity
- 7 to 14 µV/W/m²
- Response time
- 5 s
Overview
In detail
Interface and power
The SMP21 has a Modbus® RTU interface, amplified analogue output, improved response time and individually temperature-corrected measurement data. It is supplied with individually measured cosine response data. The wide, low power supply range from 5 to 30 VDC makes integration into meteorological and solar energy stations easy, and the SMP21 is protected against over-voltage, reversed polarity and short circuiting.
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- Part number
Specifications
Technical specifications
- Spectral range (50% points)
- 285 to 2800 nm
- Sensitivity
- 7 to 14 µV/W/m²
- Response time
- 5 s
- Zero offset A
- < 7 W/m²
- Zero offset B
- < 2 W/m²
- Directional response (up to 80° with 1000 W/m² beam)
- < 10 W/m²
- Temperature dependence of sensitivity (-20 ºC to +50 ºC)
- < 1 %
- Operating temperature
- -40 °C to +80 °C
- Maximum solar irradiance
- 4000 W/m²
- Field of view
- 180 °
Related
Often specified alongside
Weathertech
SP Lite2 Pyranometer
- Temp
- -40 °C to +80 °C
- Spectral range (overall)
- 400 to 1100 nm
- Sensitivity
- 60 to 100 µV/W/m²
SMP6Weathertech
SMP6 Pyranometer
- Supply
- 5 to 30 VDC
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