Fill level sensors for monitoring the level of unpressurized liquid tanks. Depending on requirements, fill level sensors can have one or two switching points.

A level sensor with one switching point (WS32) monitors the minimum level in the tank. Fill level sensors with two switching points can monitor the minimum and maximum levels in the tank. Filling of the tank with lubricant stops automatically when the maximum level is reached (WS33). An alternative use for such sensors is to monitor the minimum fill level with an early warning function when approaching this level (WS35).

This sensor signals before the oil level in the tank reaches a critical level, allowing oil to be added before the equipment stops. Other level sensors, such as those with three switching points, are available upon request.