For over thirty years, The Eppley Laboratory has concentrated on low temperature sources of extended area. Our impressive customer list includes: NOAA, NASA, SAIC, Honeywell (US, Germany), Spacebell (Belgium), Hughes, Westinghouse, and others. In addition Eppley has served on several Space Satellite Projects, including SIRS, VTPR, VHRR, SCMR, HIRS, ERB, and APEX among others. Source areas have ranged from 10 to over 1000 cm2.
Often thermoelectric heat pumping is utilized to precisely control a blackened cavity array radiator to produce a source with high stability (0.05o C), uniformity (0.1o C), and emissivity (>0.995) over a temperature range of -20o C to 125o C. Most sources can be obtained with a flat plate radiator that has an emissivity of 0.98. Forced convection is employed to stabilize the thermoelectric heat sink for sources with areas up to 150 cm2. Larger area sources require fluid stabilization. Temperatures down to -50o can be achieved with a refrigerated heat sink fluid.Sources operating below -50oC require liquid nitrogen cooling and resistive heating. Thermoelectrics are not employed.
Remote control is an option with the digital controllers through either RS232 or IEEE-488 interface. Remote interrogation of the temperature readout is also available.
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