Digital SANWA LP1 Optical Laser Power Meter 40mW 400~1100nm range optical sensor

See Details:Range: 400~1100 nm Resolution: +/-5%@calibrated wavelength 633 nm / 1mW Maximum - Minimum Cord Length: 15" Probe Dimensions: 3½" x ½" x ½" (84 x 16 x 10mm) Optical power up tp max. 40mW measurable Direct reading wavelength customization (made by order) Wide optical power measurement range Silicon photodiode Sensor can be all neatly contained and protected within the folding case. Max / Min hold Auto power save (30min.) 500mm sensor cord