Counter Meter Single Set Time Relay,Dual Set Time Relay,Hour Meter, Frequency .etc 4 digits rate counter CH8 Digital Counter Meter in industrial field Main introduction : Option: CH -----Function: S: Single Set Time Relay SS: Dual Set Time Relay L: Hour Meter N:Tacho F:Frequency FR:Line Speed J4:4 digits counter J8: 8 digits counter JR4:4 digits rate counter JR8: 8 digits rate counter Demension: ...