KSO - motion-standstill indication for components with persistence of motion after switching off is less than one time period (therefore, for example, if wheel rotation with period of 1 s is sensed, this wheel must stop within 1 s after being switched off). This type is suitable for sensing of conveyor belts, cams, etc.
KSL and KSR - represent relays with delayed operation or drop in combinations closing-opening contact.
KSFL - indicates the achieved frequency of moving part, it is suitable for machines with longer period of persistence of run-down.
KSF - same as the previous type, however, information concerning the achieved frequency is delayed here by a specific period of time (e.g. for safety reasons).
