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NR01-L 4-Component Net Radiometer
Research Grade
Robust 4-way radiometer that requires little maintenance
weather applications water applications energy applications gas flux & turbulence applications infrastructure applications soil applications

Overview

The NR01, manufactured by Hukseflux, is a research-grade net radiometer that measures the energy balance between incoming short-wave and long-wave infrared radiation versus surface-reflected short-wave and outgoing long-wave infrared radiation. Our dataloggers measure the NR01's output and control its internal heater. This net radiometer offers a professional solution for scientific-grade energy balance studies.

Note: NR01 radiometers with a serial number less than 2313 used the pn 21271 fitting. NR01 radiometers with a serial number greater than 2312 do not need the pn 21271 fitting. 

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Benefits and Features

  • Internal RTD provides temperature compensation of measurements
  • Research-grade performance
  • Internal 1-W heater reduces formation of dew and melts frost
  • Separate outputs of short wave and long wave infrared radiation for better accuracy and more thorough quality assurance
  • Robust—only requiring limited maintenance
  • Compatible with CR1000, CR3000, and CR5000 dataloggers

The "-L" on a product model indicates that the cable length is specified at the time of order.

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Detailed Description

The NR01 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 NR01 includes an on-board RTD to measure the radiometer’s internal temperature and a 1-W heater that minimizes the formation of dew and melts frost. To reduce current drain, a relay is typically used to turn on the heater only when the solar radiation is less than 20 W/m2.

Campbell Scientific's CR3000 and CR5000 dataloggers are ideal for measuring this radiometer. A CR1000 can also be used, but a 4WPB100 module is required to measure the internal RTD.

Specifications

Sensor Hukseflux’s SR01 ISO-class, thermopile pyranometer, IR01 pyrgeometer, PT100 RTD
Pyranometer Spectral Response 305 to 2800 nm
Pyrgeometer Spectral Response 4500 to 50,000 nm
Response Time 18 s
Sensitivity Range 10 to 40 μV W-1 m2
Expected Output Range -0.1 to +50 mV
Expected Accuracy for Daily Totals ±10%
Heater 90 ohm, 1.6 W (at 12 Vdc)
Operating Temperature Range -40° to +80°C
Heater Current Drain ~140 mA
Dimensions 26.3 x 11.3 x 12.1 cm (10.4 x 4.4 x 4.8 in.)
Weight
  • 1.3 kg (2.9 lb) with 5-m (16.4-ft) cable
  • 0.9 kg (2 lb) sensor only

Compatibility

Mounting

Campbell Scientific recommends NOT mounting the NR01 on a crossarm such that the sensor is farther than two feet away from the central mounting point without using some type of a brace, such as the CMB200 crossarm brace kit, to help support the weight of the sensor. The NR01 has a 1-inch mounting hole for mounting the sensor to a crossarm. Typically, the CM204 or CM206 is used as a centered crossarm. The crossarm can be mounted to any pole with a 25-mm to 54-mm outer diameter. However, for most applications, Campbell Scientific recommends attaching the crossarm to a CM310-series pole so that the sensor is above vegetation. You can also mount the crossarm to the tripod or tower that supports the datalogger’s enclosure.

The NR01 is NOT compatible with the 26120 Net Radiation Sensor Mounting Kit.

Datalogger Considerations

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR6 CR9000X
* *

Compatible Retired Dataloggers

CR500 CR510 CR10 CR10X 21X CR23X CR9000 CR5000 CR7X
* * * * *

Note:
*A 4WPB100 PRT Bridge Module is required to measure the internal RTD.

Documents


Frequently Asked Questions

Number of FAQs related to NR01-L: 12

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  1. Shading and reflection are important aspects to consider. The sensor should have a clear view of the upward hemisphere of the sky. To avoid shading effects and to promote spatial averaging, the sensor  should be mounted at least 1.5 m above the ground surface.

  2. Campbell Scientific recommends that the sensor be mounted to a separate vertical pipe at least 25 ft from any other mounting structures.

  3. It is possible that an older version of Short Cut is being used. Download the latest version of Short Cut.

    For programming assistance, consult the NR01-L instruction manual. For additional assistance, contact Campbell Scientific.

  4. Only one 4WPB100 is needed to measure the internal PRT in the radiometer.

  5. As of June 2013, all of our current and retired net radiation sensors can be mounted using this kit. These include:

    • Current sensors: CNR4-L, NR-LITE2-L, and NR01-L
    • Retired sensors: CNR1, CNR1-L, CNR2-L, NR-LITE-L, and Q7.1-L
  6. Mount the net radiometer so that no shadow will be cast on it at any time of day from obstructions such as trees, buildings, the mast, or the structure on which it is mounted.

    Campbell Scientific recommends installing a net radiometer in an open area, away from the main weather station structure on a separate vertical mast. If it is necessary to install this sensor on the main tall tower (30 ft or taller), the sensor should be installed at the top of the tower. In the northern hemisphere, the sensor should be facing south. In the southern hemisphere, the sensor should be facing north. If the tower uses a solar power system (that is, solar panels), ensure that the solar panels are installed away from the main tower.

  7. The CR1000 requires a 4WPB100 to measure the internal PRT. (Dataloggers such as the CR3000 and CR5000 have the necessary PRT bridge module built in to measure the PRT.) Note that the CNR4-L also includes an internal thermistor, which can be directly measured by the CR1000. Because of this, when using a CR1000, Campbell Scientific typically recommends monitoring the internal temperature of the CNR4-L using its internal thermistor instead of the PRT. 

  8. Most Campbell Scientific sensors are available as an –L, which indicates a user-specified cable length. If a sensor is listed as an –LX model (where “X” is some other character), that sensor’s cable has a user-specified length, but it terminates with a specific connector for a unique system:

    • An –LC model has a user-specified cable length for connection to an ET107, CS110, or retired Metdata1.
    • An –LQ model has a user-specified cable length for connection to a RAWS-P weather station.

    If a sensor does not have an –L or other –LX designation after the main model number, the sensor has a set cable length. The cable length is listed at the end of the Description field in the product’s Ordering information. For example, the 034B-ET model has a description of “Met One Wind Set for ET Station, 67 inch Cable.” Products with a set cable length terminate, as a default, with pigtails.

    If a cable terminates with a special connector for a unique system, the end of the model number designates which system. For example, the 034B-ET model designates the sensor as a 034B for an ET107 system.

    • –ET models terminate with the connector for an ET107 weather station.
    • –ETM models terminate with the connector for an ET107 weather station, but they also include a special system mounting, which is often convenient when purchasing a replacement part.
    • –QD models terminate with the connector for a RAWS-F Quick Deployment Station.
    • –PW models terminate with the connector for a PWENC or pre-wired system.
  9. Not every sensor has different cable termination options. The options available for a particular sensor can be checked by looking in two places in the Ordering information area of the sensor product page:

    • Model number
    • Cable Termination Options list

    If a sensor is offered in an –ET, –ETM, –LC, –LQ, or –QD version, that option’s availability is reflected in the sensor model number. For example, the 034B is offered as the 034B-ET, 034B-ETM, 034B-LC, 034B-LQ, and 034B-QD.

    All of the other cable termination options, if available, are listed on the Ordering information area of the sensor product page under “Cable Termination Options.” For example, the 034B-L Wind Set is offered with the –CWS, –PT, and –PW options, as shown in the Ordering information area of the 034B-L product page.

    Note: As newer products are added to our inventory, typically, we will list multiple cable termination options under a single sensor model rather than creating multiple model numbers. For example, the HC2S3-L has a –C cable termination option for connecting it to a CS110 instead of offering an HC2S3-LC model.