Pyrheliometers from Kipp & Zonen

The CHP1 and SHP1 pyrheliometers are a WMO standard spectrally flat Class A sensor:

SHP1 Specifications.


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
Classification to ISO 9060:2018 Spectrally Flat Class A


SHP1 Pyrheliometer from Kipp and Zonen.

The SHP1 pyrheliometer takes the accuracy of the analogue CHP1 sensor technology and adds a smart interface (RS485 Modbus). As a result, the SHP1 has a faster response time and can be integrated with a SCADA system. It is the ideal sensor for measuring Direct Normal Irradiance in meteorological and utility-scale solar farm prospecting.

With integrated temperature sensor and digital polynomial functions, the SHP1 pyrheliometer provides individual correction for the temperature sensitivity of the detector from -40 °C to +80 °C.

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, and the power input is protected against reversed polarity.

Serial Output

Two versions are available, SHP1-V has an analogue output of 0-1 V, SHP1-A is 4-20 mA. Both have a 2-wire RS-485 serial interface with Modbus® RTU protocol that provides a range of instrument status and configuration information, with user-selectable options.

The analogue outputs allow easy connection to virtually any data logger without the need for sensitive mV inputs. Modbus® interfaces directly to PLC and 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.

For instructions on the installation of the pyrheliometer on the SOLYS2 sun tracker please watch this video.

Pyrheliometer Summary

SHP1 Pyrheliometer
The SHP1 pyrheliometer – An enhanced version of the CHP 1, equipped with a smart interface with both amplified analogue output and digital RS 485 Modbus®. The SHP1 has a response time under 2 seconds and individually measured temperature correction from -40°C to +70°C.

CHP1 Pyrheliometer
The CHP 1 fully complies with the most current ISO and WMO performance criteria for Class A Normal Incidence Pyrheliometer.

Every Kipp and Zonen pyrheliometer is calibrated upon manufacture and is supplied standard with a WRR (World Radiometric Reference) traceable calibration certificate.

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