Cal Source SA-series infrared (IR) emitters are designed to be used as steady state (DC) emitters of blackbody radiation. 

The radiating element in the steady-state emitters is a coiled filament of a Cal Sensors specific material with a specialized coating to give an emissivity of 0.70. Radiated output closely emulates a blackbody in spectral distribution. SA-series emitters are designed to operate at a rated filament temperature of 1170° Kelvin.

Standard SA-series emitters are offered in several models with specific filament diameters and number of coils to provide the desired input/output power at a filament temperature of 1170 ° K. 

All standard emitters have lifetimes in excess of 30,000 hours (MTBF) at the rated input power. Standard window materials are available to tailor the output to specific wavelength ranges of interest. Standard models include a parabolic reflector to provide near collimated and uniform radiation output. Without a reflector the radiating element approximates an isotropic point emitter.