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Net Radiometer

Reliable net radiation measurements in real time

If you’re planning a large sensor network and want long-lasting performance for less work and less budget, then the Apogee Net Radiometer is perfect for you. Get research-grade accuracy for much less than other four-component net radiometers. And, it’s plug and play with the ZL6 data logger and ZENTRA Cloud for easy, remote data access, so you can visualize your data in near-real time, wherever you are.

Engineered for excellence

Net radiation is a key variable in surface energy balance and influences turbulent fluxes, including evapotranspiration. The Apogee SN-500 four-component net radiometer consists of blackbody pyranometer and pyrgeometer pairs that face both upward and downward to provide incoming and outgoing shortwave and longwave radiation measurements. Each individual sensor measures the four separate components of net radiation for best accuracy.

Simple and precise

A small, lightweight design means easy mounting to a cross arm using a mounting bracket (included) which simplifies precision leveling of the sensors.

Easy remote data access

Combine the SN-500 with the ZL6, where all data is connected and delivered in near-real time through the cloud. And with the SN-500’s four-component measurements, it’s a snap to compute any number of important radiation parameters like net radiation, net longwave radiation, net shortwave radiation, albedo, total irradiance, etc.  

Affordable accuracy, guaranteed

Backed by an industry-leading four year warranty and outstanding customer support, the Apogee SN-500 is a long-life, accurate, easy-to-install net radiometer with an ultra-rugged form and remote data access. If you need research-grade accuracy at an affordable price, then you’ll love the easy-to-use Apogee SN-500 Net Radiometer.

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California requires the following notice

⚠️ WARNING: This product may contain chemicals including ethylene glycol, lead, nickel, styrene and cadmium, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov

Net Radiometer

Specifications

Output type

SDI-12

Response time

1 s (SDI-12 data transfer rate; detector response times are 0.5 s)

Operating environment

-50 to 80 C; 0 to 100 % relative humidity

Dimensions

116 mm length, 45 mm width, 66 mm height

Mass

320 g (with mounting rod and 5 m of lead wire)

Cable

M8 connector (IP68 rating) to interface to sensor housing; 5 m of four conductor, shielded, twisted-pair wire with a TPR jacket; ZL6 stereo plug termination

Data loggers

Compatible with METER EM60 series, ZL6 series, ZSC and ProCheck

PYRGEOMETER SPECIFICATIONS

Calibration uncertainty

± 5 %

Measurement range

-200 to 200 W m-2 (net longwave irradiance)

Measurement repeatability

Less than 1 %

Long-term drift

Less than 2 % change in sensitivity per year

Non-linearity

Less than 1 %

Detector response time

Less than 0.5 s

Field of view

150°

Spectral range

5 to 30 µm

Temperature response

Less than 5 % from -15 to 45 C

Window heating offset

Less than 10 W m-2

Zero offset B

Less than 5 W m-2

Tilt error

Less than 0.5 %

Uncertainty in daily total

± 5 %

PYRANOMETER SPECIFICATIONS

Calibration uncertainty

± 5 %

Measurement range

0 to 2000 W m-2 (net shortwave irradiance)

Measurement repeatability

Less than 1 %

Long-term drift

Less than 2 % per year

Non-linearity

Less than 1 %

Detector response time

0.5 s

Field of view

180° (upward-looking); 150° (downward-looking)

Spectral range

385 nm to 2105 nm (upward-looking), 295 nm to 2685 nm (downward-looking); (50 % points)

Directional (Cosine) response

Less than 30 W m-2 at 80° solar zenith (upward-looking); Less than 20 % for angles between 0 and 60° (downward-looking)

Temperature response

Less than 5 % from -15 to 45 C

Zero offset A

Less than 5 W m-2; Less than 10 W m-2 (heated)

Zero offset B

Less than 5 W m-2

Uncertainty in daily total

Less than 5 %

California requires the following notice:

⚠️ WARNING: This product may contain chemicals including ethylene glycol, lead, nickel, styrene and cadmium, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov

Support

Have a question or problem? Our support team can help.

We manufacture, test, calibrate, and repair every instrument in house. Our scientists and technicians use the instruments every day in our product testing lab. No matter what your question is, we have someone who can help you answer it.

Email: support.environment@metergroup.com

Phone US: +1 509-332-5600
Phone Europe: +49 89 12 66 52 0

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