CGR 4 pyrgeometer is an instrument for the highest quality scientific measurements. The specially designed meniscus dome provides a 180º field of view with negligible directional response error. A hard-carbon coating on the outside of the dome smoothes the spectral response and provides extra protection to the silicon surface. The excellent thermal stability of the dome construction and coupling to the instrument body eliminates the need for dome temperature measurements or dome shading. CGR 4 can be fitted with the CVF 3 ventilation unit to further improve its performance.
A waterproof socket is fitted for the signature yellow signal cable, which is available in a range of lengths pre-wired to the waterproof plug.
The integral bubble level is raised to the top of the housing and can be viewed without removing the redesigned snap-on sun shield, which also covers the connector. The connector with gold-plated contacts allows for easy exchange and re-calibration. The drying cartridge is now a screw-in type that can be simply removed using a coin, for changing the desiccant that is supplied in convenient refill packets.
Main features :
Low temperature dependence of sensitivity
Very low window heating
Reliable all weather performance
Connector for easy mounting and recalibration
Specifications :
Spectral Range
4.5 to 42 µm
Sensitivity (nominal)
5 to 10 µV/ W / m²
Operating Temperature
-40 to +80 °C
Response time (95 %)
< 18 s
Non-linearity
< 1 %
Temperature Dependence of Sensitivity (€"20 to +50 ºC)
