SMP3

The SMP3 is a smart pyranometer with low maintenance and industry standard digital and analogue amplified outputs. Based on the proven CMP3 technology, the SMP3 adds Modbus® interface, improved response time and temperature corrected measurement data.

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Key features

RS-485 Modbus® RTU interface
0 – 1V or 4-20mA output

5 year warranty (*)
Active temperature correction from -40°C to +80°C

The wide and low power supply range from 5-30 VDC makes integration in meteorological stations easy. The SMP is protected against over voltage, reversed polarity and short circuiting. Because all SMPs have identical sensitivity and connections, exchanging instruments during recalibration is easy.

PC Software for data logging, display of data and Modbus® address setting is provided as standard.

SMP3 measures global solar radiation on a horizontal plane. When tilted with the same angle as a PV panel it measures the tilted global radiation, for PV module efficiency calculations.

(*) This product will need to be registered by the end-user within 6 months of purchase to activate the 5 year warranty.

Technical specification

Spectral range (50% points)	300 to 2800 nm
Response time (63%)	< 1.5 s
Response time (95%)	< 12 s
Zero offset A	< 15 W/m²
Zero offset B	< 5 W/m²
Directional response (up to 80° with 1000 W/m² beam)	20 W/m²
Temperature dependence of sensitivity (-20 ºC to +50 ºC)	< 3 %
Analogue output (-V version)	0 to 1 V
Analogue output (-A version)	4 to 20 mA
Digital output	2-wire RS-485