The 919P-003-10 High Sensitivity Thermopile Sensor is designed for high sensitivity with very low noise and drift. It has an active diameter of 9.5 mm and can measure optical power from 40 µW to 3 W and single shot energy from 20 µJ to 2 J. It BB absorber type is spectrally flat and covers the wavelength range from 190 nm to 11 µm. It has a 1/4-20 tapped hole for post or plate mounting and includes a 2.25 inch long 1/2 inch diameter post with a 1/4-20 tapped hole on both ends.