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. The PG01-E version has an in-built amplifier with a millivolt output for easy signal measurement.

 

Performance Specification

Sensitivity (typical)	13 μV/W.m-2 (PG01) 4 mV/Wm-2 (PG01-E)
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	< 2%

STABLE and 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.