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RETIRED ›
This product is no longer available and has been replaced by: CNR4-L. Some accessories, replacement parts, or services may still be available.
CNR1 Net Radiometer

Overview

The CNR1 net radiometer by Kipp & Zonen is for applications requiring research-grade performance. The radiometer measures the energy balance between incoming short-wave and long-wave IR radiation versus surface-reflected short-wave and outgoing long-wave IR radiation. The CNR1 consists of a pyranometer and pyrgeometer pair that faces upward and a complementary pair that faces downward. The pyranometers and pyrgeometers measure short-wave and far infrared radiation, respectively. The CNR1 also includes an RTD to measure the radiometer’s internal temperature and a heater that can be used to prevent condensation. Lead length is 82 ft. For custom cable length, order CNR1-L.

If you need a mounting bracket for a CNR1 or CNR1-L, get advice by clicking the Ask a Question button on this page, or call 435-227-9000 and ask to speak to someone in our Flux group.

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Detailed Description

The CNR1 comes with an 82-ft cable length. This net radiometer is for applications requiring research-grade performance. It measures the energy balance between incoming short-wave and long-wave infrared radiation versus surface-reflected short-wave and outgoing long-wave infrared radiation.

The CNR1 consists of a pyranometer and pyrgeometer pair that faces upward and a complementary pair that faces downward. The pyranometers and pyrgeometers measure short-wave and far infrared radiation, respectively. All four sensors are calibrated to an identical sensitivity coefficient.

The CNR1 also includes an RTD to measure the radiometer’s internal temperature, a 4WPB100 module to interface the RTD with the datalogger, and a heater that can be used to prevent condensation.

The CNR1 uses six differential or four single-ended and two differential analog channels on the datalogger. Dataloggers that provide sufficient channels include our CR1000, CR3000, and CR5000.

If you need a mounting bracket for a CNR1 or CNR1-L, get advice by clicking the Ask a Question button, or call 435-227-9000 and ask for someone in our Flux group.

Specifications

Sensors Kipp & Zonen’s CM3 ISO-class, thermopile pyranometer, CG3 pyrgeometer, PT100 RTD
Pyranometer Spectral Response 305 to 2800 nm
Pyrgeometer Spectral Response 5000 to 50,000 nm
Response Time 18 s
Sensitivity Range 7 to 15 μV W-1 m2
Pyranometer Output Range 0 to 25 mV
Pyrgeometer Output Range ±5 mV
Expected Accuracy for Daily Totals ±10%
Directional Error < 25 W m-2 (pyranometer)
Heating Resistor 24 ohm, 6 W (at 12 Vdc)
CE Compliance CE compliant under the European Union’s EMC directive

Compatibility

Do Not use the UT018 crossarm with the 14364 mounting bracket to fasten the CNR1 to a tower leg. The 14264 mounting bracket should be attached directly to a verticle pole.

Datalogger Considerations

The CNR1 uses six differential or four single-ended and two differential analog channels on the datalogger.

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR9000X

Compatible Retired Dataloggers

CR500 CR510 CR10 CR10X 21X CR23X CR9000 CR5000 CR7X

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Frequently Asked Questions

Number of FAQs related to CNR1: 3

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  1. As a general guide, go at least 1.5 m above the tallest plant (tree) in an ecosystem.

  2. CNR1 is a four-output net radiometer. It gives values for incoming short-wave, incoming long-wave, outgoing short-wave, and outgoing long-wave radiation. It also calculates the net radiation and albedo.

  3. If the BR (Bowen Ratio) system is being run on 21X or CR23X dataloggers, a CNR1 net radiometer cannot be used with the system because those dataloggers do not have enough input channels. For this reason, Campbell Scientific recommends running a CNR1 out of a separate datalogger.


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