The pyrheliometer is designed for unattended normal incidence direct solar radiation measurement research.
A pyrheliometer is an instrument designed specifically to measure the direct beam solar irradiance with a field of view limited to 5 °. This is achieved by the shape of the collimation tube, with precision apertures, and the detector design.
The front aperture is fitted with a quartz window to protect the instrument and to act as a filter that passes solar radiation between 200 nm and 4000 nm in wavelength. Pyrheliometers need a sun tracker to point at the sun.
The CHP 1 fully complies with the most current ISO and WMO performance criteria for First Class Normal Incidence Pyrheliometer. Every CHP 1 is calibrated upon manufacture, and is supplied standard with a WRR (World Radiometric Reference) traceable calibration certificate.
The SHP1 pyrheliometer is 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.