The 919P-040-50 is a large aperture thermal sensor measuring up to 35W continuously and 150W with a 3 minute limit. Its BB absorber type is spectrally flat and covers the wavelength range of 190 nm to 11 µm. It has an aperture of 50 mm and can measure power from 300 mW to 35 W and single shot energy from 100 mJ to 200 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.