You are bidding on an Eppley Precision Spectral Pyranometer (PSP).  This is a highly respected scientific instrument designed to measure global solar irradiance (total incoming solar radiation) on a flat surface. These instruments are widely used in:

• Atmospheric and climate research

• Meteorology and weather monitoring

• Solar energy and photovoltaic research

• Environmental and Earth sciences

• University and government research programs

The PSP model is known for its precision, stability, and long-term reliability, making it a standard reference instrument in solar radiation measurement.  These are the standard solar radiometers used in NOAA/NWS reference Met stations across the US

• Shows cosmetic wear consistent with use in a professional laboratory setting

• Function tested and calibrated for immediate use.