The Model SI-540 from Scientific Instruments is a Space Qualified Temperature Sensor that operates over a temperature range of 1.5K to 450K and has a calibrated accuracy of +/- 0.03K. It features high sensitivity in the lower range and are interchangeable to a standard V/T curve. This miniature sensor is mounted in a gold-plated copper canister with four 36 AWG polyimide coated, color-coded, phosphor bronze leads. The ISO 9001 certified canister measures 0.093 X 0.250 inches (Diameter X L).