SMP 22 - Smart pyranometer ISO class A

Important features :

ISO 9060:2018 - spectrally flat, class A
Most accurate pyranometer currently available
Lowest directional error < 5 W/m²
Individual temperature correction from -40°C to +80°C
No change of desiccant for 10 years
RS-485 serial communication using Modbus® RTU protocol
0 - 1 V or 4 - 20 mA analogue output
5 year warranty

The Smart pyranometer SMP 22 (ISO 9060:2018 - spectrally flat, class A - formerly ISO 9060:1990 Secondary Standard) combines the smart interface with quartz domes and sensor technology from the CMP 22, which has a proven track record of decades, making it the most accurate and reliable pyranometer in the world. The SMP 22 has the widest spectral range, improved directional response, and reduced thermal offsets. Because of the highest optical quality domes, the directional error is reduced to below 5 W/m². The SMP 22 is extremely robust and comes standard with RS-485 Modbus® interface and 5 year warranty.

The integrated bubble level is raised to the top of the housing and can be viewed without removing the snap-on sun shield, which also covers the signal cable connector.

The SMP 22 has internal desiccant that will last for at least 10 years. This minimizes maintenance significantly.

The interval for dome cleaning can be extended and the quality of measurements maximized by fitting SMP 22 with the CVF 4 ventilation unit.

The SMP 22 has a RS-485 Modbus® RTU interface, 0 - 1 V or 4 - 20 mA analogue output, improved response time and individual temperature corrected measurement data. The SMP22 is supplied with individual measured cosine response data. The wide and low power supply range from 5 to 30 VDC makes integration in meteorological and solar energy stations easy. The SMP22 is extreme robust and comes with 5 years warranty.

Thanks to standardized output and connections of every SMP 22, exchanging instruments for recalibration is easy.

SmartExplorer Windows™ software for data logging, display of data and Modbus® address setting, can be downloaded from the Kipp & Zonen / Ott HydroMet webpage.

Specifications

Spectral range (50% points)	250 to 3500 nm
Response time (63%)	0,7 s
Response time (95%)	2 s
Zero offset - thermal radiation (at 200 W/m²)	< 3 W/m²
Zero offset - temperature change (5 K/h)	< 1 W/m²
Directional response (up to 80° with 1000 W/m² beam)	< 5 W/m²
Temperature dependence of sensitivity (-20ºC to +50ºC)	< 0,3 %
Analogue output (-V version)	0 - 1 V (-200...2000 W/m²)
Analogue output (-A version)	4 - 20 mA (0...1600 W/m²)
Digital output	2-wire RS-485
Overall accuracy	± 1 %