The Kipp & Zonen CNR 4 uniquely combines four sensors into one housing, complies with the World Meteorological Organisation standard ‘Good Quality’ and has an integrated ventilation unit.

CNR 4 consists of a pair of pyranometers and a pair of pyrgeometers. One set facing upward and one set facing downward. Together they measure the energy balance between short-wave and long-wave (Far Infrared) radiation. CNR 4 is built on the legacy of the popular CNR 1, but is improved in almost every respect.

The CNR 4 is very light weight with an integrated sun shield to reduce thermal effects on the measurements. The meniscus dome of the upper pyrgeometer gives significantly improved long-wave measurements. The optional CNF 4 ventilation unit is a unique and efficient way to reduce dirt, precipitation, dew and frost on the sensors.

CNR 4 is ideally suited to the following applications; meteorological, hydrological and agricultural scientific research