ES 46 Compact size 46mm dia * 41mm long. High resolution to 3600 lines High speed switching > 300kHz Enviromental protection to IP67 EB 58 58mm dia * 58mm long. High resolution to 10,000 lines High speed switching > 300kHz Enviromental protection to IP67 EC 58 for Heavy duty applications 58mm dia * 58mm long High speed switching > 300kHz Enviromental protection to IP67   HD 2.0 Heavy duty encoder for harsh industrial enviroments OEW Compact 38mm dia * 38mm long. resolution to 2500ppr OEZ Very compact design 28mm dia * 30mm long. resolution to 1500ppr OME 18mm dia * 17mm long. sine wave output to 360ppr OME-A 18mm dia * 17mm long. incremental Square wave to 500ppr The 58CS series shaft encoder is food industry approved manufactured in 316 stainless steel and sealed to IP 66/67 making it capable of withstanding direct water spray of 220psi (15bar)