The L50(300)A-LP2-65 thermopile sensor (P/N 7Z02782) is designed for high power density and long pulse lasers. This sensor also measures air coupled pulses from IPL dermatological sources. It is similar to the L50(300)A-IPL but does not have the window so is for air coupled sources only. It gives the most accurate measurements for air coupled sources. It has a 65 mm aperture and can measure optical power from 400 mW to 50 W continuously and to 300 W intermittently. The sensor can measure energy from 200 mJ to 1000 J. Its high damage threshold LP2 absorber covers the spectral range from 250 to 2200 nm. The sensor comes with a standard 1.5 meter cable for connecting to a meter or PC interface.