CHP1 Pyrheliometer

The CHP1 pyrheliometer is the most commonly used radiometer for the measurement of direct normal irradiance (DNI) and offers high accuracy and reliability.

Description

The CHP1 fully complies with the most current ISO and WMO performance criteria for First Class Normal Incidence Pyrheliometer. Every CHP1 is calibrated upon manufacture and is supplied standard with a WRR traceable calibration certificate.

Specifications

Spectral range (50% points) 200 to 4000 nm
Sensitivity 7 to 14 µV/W/m²
Response time < 5 s
Zero offset B < 1 W/m²
Temperature dependence of sensitivity (-20 ºC to +50 ºC) < 0.5 %
Field of view 5 ±0.2 °
Operational temperature range -40 to +80 °C
Non-linearity < 0.2 %
Maximum solar irradiance 4000 W/m²
International standards (ISO) First Class