... ;2.Fast response:<20ms;3.Simple operation interface;4.Beam Spacing:10mm,20mm,40mm,80mm SNC Series: ... series's specification * Fast response time <20ms.* LED indicator,easy to algin, display real-time working status.* Auto self-checking ... indicator,self-examing indicator.Electrical noise immunityIEC61000-4-4:level IV/IEC61000-4-2level IVInsulation resistance>100MΩDielectric strengthAC1500V,60sAmbient ...