The CNR4 is a research-grade net radiometer. It measures the energy balance between incoming and outgoing radiation. It has a pyranometer and a pyrgeometer that face up, and another pair that face down. Both a thermistor and a resistance temperature detector (RTD) are built in for temperature compensating. The solar shield on the CNR4 reduces thermal effects on the sensors, and the bubble dome sheds water and increases the field of view.

Features

High accuracy
Compatible with CR1000, CR3000, and CR5000 dataloggers
Optional ventilation unit with heater

Specifications

Spectral Response
Pyranometer: 305 to 2800 nm
Pyrgeometer: 4.5 to 42 μm
Response Time: <18 seconds
Temperature Dependence of Sensitivity: <4% (-10° to + 40ºC)
Sensitivity Range: 5 to 20 μV W-1 m2
Output Range (typical for atmospheric applications)
Pyranometer: 0 to 15 mV
Pyrgeometer: ±5 mV
Non-Linearity: <1%
Tilt Error: <1%
Uncertainty in Daily Total
Pyranometer: <5% (95% confidence level)
Pyrgeometer: <10% (95% confidence level)
Directional Error: <20 W m-2 (pyranometer); angles up to 80° with 1000 W/m2 beam radiation
CE Compliance: Conforms to the CE guideline 89/336/EEC 73/23/EEC
Datalogger Requirements
Radiation Components: 4 differential channels or 4 single-ended channels
Thermistor: 1 voltage excitation channel and 1 single-ended channel
Pt-100 RTD: 1 current excitation channel and 1 single-ended channel

Producing Area:USA