The Middleton Solar PG01 Pyrgeometer measures the long wave radiation emitted by the atmosphere (downwelling) or by the Earth surface (upwelling). It uses a passive thermoelectric sensor shielded by a flat silicon window.

 

Performance Specification

Sensitivity (typical)	13 µV/W.m-2
Response time	11s (95%)
Spectral range	4.5 to 42 µm
Spectral selectivity (8 to 14 µm)	< 5%
Non-linearity	< 1%
Irradiance	-250 to +250 W.m-2
Field of view	170°
Temperature dependence (-20 to +50°C)	< 2%

 

 STABLE & ACCURATE LONGWAVE RESPONSE

 Weatherproof and durable.

 Offset error from window heating is tightly constrained.

 

 Effective solar blind inner coating on silicon window.

 

 Protective outer DLC coating on silicon window.