SGR4 Pyrgeometer For Meteorological Observations

The SGR4 has a digital interface and is designed for meteorological observations. The excellent thermal stability of the dome construction eliminates the need for dome temperature measurements or dome shading.


SGR4 Pyrgeometer from Kipp and Zonen

The SGR4 pyrgeometer is the highest quality pyrgeometer available. It is designed to measure downward longwave radiation. It has a RS-485 Modbus® interface, amplified analogue output, improved response time and temperature corrected measurement data.

The long-wave net- and downward radiation are directly available over Modbus®.

The wide and low power supply range from 5 to 30 VDC makes integration in meteorological and solar energy stations easy. The SGR4 is extremely robust and comes with 5 years warranty.

SGR4 Specifications

Spectral range (overall) 4.4 to 50 µm = 4400 to 50000 nm
Response time (95%) 18 s
Window heating offset < 4 W/m²
Zero offset B < 2 W/m²
Temperature dependence of sensitivity (-20 ºC to +50 ºC) < 1 %
Operational temperature range -40 to +80 °C
Field of view 180 °
Non-linearity < 1 %
Analogue output (-A / -V version) 4 to 20 mA / 0 to 1 V
Digital output 2-wire RS-485