SN500SS Net Radiometer
Digital, Low-cost Net Radiometer
weather applications water applications energy applications gas flux and turbulence applications infrastructure applications soil applications


This four-component net radiometer, manufactured by Apogee Instruments, provides individual measurement of net radiation components. This sensor features an SDI-12 output, eliminating the need for multiple analog channels to measure the individual components of net radiation. The SN500SS offers a complete package that includes a net radiometer, mounting rod, pigtail lead cable for data logger interface, and a carrying case.



Sensor Two thermopile pyranometers, two pyrgeometers
Measurement Description Measures incoming and outgoing short-wave and long-wave radiation
Heater 62 mA current drain and 740 mW power requirement at 12 Vdc
Operating Temperature Range -50° to +80°C and 0 to 100% humidity
Response Time 1 s (SDI-12 data transfer rate; detector response times are 0.5 s)
Heater Current Drain
  • 63 mA (heaters on; communication enabled)
  • 1.5 mA (heaters off; communication enabled)
  • 0.6 mA (heaters off; communication disabled)
Dimensions 11.6 x 4.5 x 6.6 cm (4.6 x 1.8 x 2.6 in.)
Weight 320 g (11.29 oz) with mounting rod and 5 m (16.4 ft) of lead wire


Spectral Range
  • 385 to 2105 nm (upward-looking)
  • 295 to 2685 nm (downward-looking)
  • 0.057 mV per W/m2 (upward-looking)
  • 0.15 mV per W/m2 (downward-looking)
Expected Output Range
  • 0 to 114 mV (upward-looking)
  • 0 to 300 mV (downward-looking)


Spectral Range 5,000 to 30,000 nm
Sensitivity 0.12 mV per W/m2
Expected Output Range -24 to +24 mV


Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Data Loggers

Product Compatible Note
CR1000 (retired)
CR3000 (retired)
CR800 (retired)
CR850 (retired)


SN500SS Program Example (1 KB) 08-11-2021

An example program that uses the M! SDI-12 command to measure the incoming short-wave (SW) radiation, outgoing SW radiation, incoming long-wave (LW) radiation, and outgoing LW radiation of the SN500SS. The example program supports the CR6 and CR1000X data loggers.

Case Studies

United Kingdom: Pioneering Research in Carbon Sequestration
Overview In the fight against climate change, innovative solutions are emerging to address the global more
South Africa: Sustainable Solutions for Farms
International partnerships for sustainable innovations Improved water use in agriculture is essential to successfully adapt more

Articles and Press Releases

Listed Under

Common Accessory for the following products:

Privacy Policy Update

We've updated our privacy policy.  Learn More

Cookie Consent

Update your cookie preferences.  Update Cookie Preferences