A float with a permanent magnet moves reliably along with the liquid level on a guide tube. Within the guide tube is fitted a reed contact (inert gas contact), which is energised, through the non-magnetic walls of the float and guide tube, by the approach of the float magnet. By using a magnet and reed contact the switching operation is non-contact, free from wear and needs no power supply. The contacts are potentialfree. Float switches are also available with multiple switch points.

The switching functions always refer to a rising liquid level: Normally open, normally closed or change-over contact.

Through the use of a float for a max. of 2 switch points a bistable switch behaviour can be achieved, meaning that the switching status also remains available, when the filling level continues to rise above or drop below the switch point.

The float switch is simple to mount and maintenance-free, so the costs of mounting, commissioning and operation are low.

In addition to the various applications for float switches for vertical installation (model FLS), the model HLS horizontal float switches likewise offer innumerable possibilities to monitor and/or switch levels in order to indicate minimum/maximum levels. The float is attached to a supported, swivelling lever and moves with the level of the medium being measured. By means of a permanent magnet, fixed to the end of the lever, when a preset switch point is reached, a reed contact (inert gas contact) within the contact tube is actuated.

By using a permanent magnet and a reed contact the switching operation is non-contact, free from wear and needs no power supply. The functioning of the float switch is independent of foaming, conductivity, vapours, bubble formation and vibrations. The signal processing is universal. Direct connection to PLCs, NAMUR connections, signal amplifiers or contact protection relays is possible. The float switch is simple to mount and maintenance-free, so the costs of mounting, commissioning and operation are low.

In an external chamber (bypass chamber), a float with a permanent magnet moves on a guide tube in relation to the liquid level, following the principle of communicating vessels. Within the guide tube is fitted a reed contact (inert gas contact), which is energised, through the non-magnetic walls of the float and guide tube, by the approach of the float magnet. By using a magnet and reed contact the switching operation is non-contact, free from wear and needs no power supply. The contacts of the level switch are potential-free.

The switching functions always refer to a rising liquid level.

Thelevel switch is simple to mount and maintenance-free, so the costs of mounting, commissioning and operation are low.

With its compact design, the model HLS-M float switch for horizontal installation in miniature design is ideally suited for use in small tanks, for indicating minimum/maximum levels.

The float is attached to a supported, swivelling lever and moves with the level of the medium being measured. By means of a permanent magnet, when a preset switch point is reached, a reed contact (inert gas contact) is actuated.

By using a magnet and reed contact the switching operation is non-contact, free from wear and needs no power supply. The contacts are potential-free.

The switching function refers to a rising liquid level: Standard use as normally open contact (can be used as normally closed contact by a 180° rotation).

The float switch is simple to mount and maintenance-free, so the costs of mounting, commissioning and operation are low.

The model RLS-5000 bilge float switch is used for the monitoring of limit levels in shipbuilding (e.g. in bilge water tanks) and industrial applications. The robust stainless steel case and the durable marine cable outlet protect the float system even under high mechanical loading, e.g. due to flotsam such as sticks and pieces of wood. Inside the stainless steel case, a permanent magnet built into the float triggers, with its magnetic field, the potential-free reed contact built into the pipe.

The triggering of the reed contact by the permanent magnet is contact-free and thus free from wear. The reed switch function is freely definable as normally open, normally closed or change-over contact. In the event of maintenance, the optionally available test device enables the manual triggering of the float by a movable wire bracket.

With its optimised mechanical design and certification in accordance with the leading maritime standards, the RLS-5000 is particularly suitable for long-term and reliable use in shipbuilding applications.