The 919P-030-18 General Purpose Thermopile Sensor measures laser power up to 30 W. It's BB absorber type is spectrally flat and covers the wavelength range 190 nm to 11 µm. It has an active diameter of 17.5 mm and can measure power from 20 mW to 30 W and single shot energy from 6 mJ to 30 J. 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.