The 919P-600-65 Fan Cooled Thermopile Sensor is an improved version of 919P-500-65, pushing the maximum power level up to 600 W. It's BB absorber tpye is spectrally flat and covers the wavelength range 190 nm to 11 µm. It has a large active diameter of 65 mm and can measure continuous optical power from 5 to 600 W and single shot energy from 600 mJ to 600 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.