... greatest extent.1.Specification:SNAxx20 (xx=06, 08, 10, 12......72)SNAxx30 (xx=06, 08, 10, 12.....72)SNAxx40 (xx=04, 06 ... , 08, 10.....72)SNAxx80 (xx=02, 04, 06, 08......20)Protection height=(xx-1)×light axis ... , 60sInsulation resistance>100MΩ High Sensitivity Photo-Electronic Safety Device for Machine