The 3A-P-FS-12 is a very sensitive thermal power/energy laser measurement sensor for divergent beams and has a fused silica window. It has a 12mm aperture and can measure from 15µW to 3W and from 20µJ to 2J. Its P type absorber is spectrally flat and covers the spectral range from 0.22 to 2.1µm. The sensor comes with a 1.5 meter cable for connecting to a meter or PC interface.