The 20C-UAS very compact OEM thermal power and energy sensor features built in electronics and dimensions of only 38x38x34 mm. It has a 12 mm aperture and measures laser power from 10 mW to 4 W stand alone and up to 20 W when heat sinked. It can measure energy from 6 mJ to 10 J. Its broadband coating covers the spectral range from 0.19 to 11 µm. It has analog and RS232 output.