... -vibration 1.Basic introductionSNQ0640 light curtain series, sensor section size is 53 ×35,structure compact, ... protection.SNQ0640 series,plane mirror reflect, protective height 200 mm,protective range 2sides<6000mm,3 sides ... )Light axis pitch 20mm, 30mm, 40mm, 80mmProtection height=(xx-1)×light axis pitchSNQxx20 100,140,180,220 ... Identifies the parameters for the selected Infrared Area Sensor SNQ0640