The combination of the CHP1 sensor technology with smart interface advantages makes the SHP1 the best commercially available pyrheliometer.

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CHP 1 Pyrheliometer

Key features

  • Fast response time
  • RS-485 Modbus®
  • 5 year warranty (*)
  • Temperature corrected

The smart interface not only provides versatile outputs, the integrated temperature sensor and digital polynomial functions also provide individual correction for the temperature sensitivity of the detector from -40 °C to +70 °C. The improved response time and the standardised output make it easy to interchange instruments for recalibration. Thanks to the Modbus® protocol, a range of instrument status and configuration information is available, with user-selectable options.

SHP1 pyrheliometers have extremely low power consumption so that internal heating does not affect the detector performance. They operate from a wide range of supply voltages, making them ideal for power-critical applications. All the inputs and outputs are protected against reversed polarity, over voltage and short-circuits.

The SHP1 pyrheliometer is available in two versions, one has an analogue output of 0-1 V, the other is 4-20 mA. Both have a 2-wire RS-485 interface with Modbus® (RTU) protocol.

The analogue outputs allow easy connection to virtually any data logger without the need for sensitive mV inputs. Modbus® interfaces directly to RTUs, PLCs, SCADA systems, industrial networks and controllers. A recalibrated instrument keeps the same analogue and digital measurement ranges, saving time by eliminating re-scaling of data collection equipment. The SHP1 is supplied with a comprehensive, traceable, calibration certificate.

(*) 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) 200 to 4000 nm
Response time (63%) < 0.7 s
Response time (95%) < 2 s
Zero offset due to temperature change (5K/h) < 1 W/m²
Temperature dependence of sensitivity (-30 ºC to +60 ºC) < 0.5 %
Analogue output (-V version) 0 to 1 V
Analogue output (-A version) 4 to 20 mA
Digital output 2-wire RS-485
Power supply 5 to 30 VDC
International standards (ISO) First Class

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