Level switch
For the process industry, in laterally mounted external chamber
- Mounting on engines, tanks, vessels or enclosures, where, due to a lack of space, installation within them is not possible
- Use for turbulent liquid levels such as in oil sumps in large engines, gearboxes etc.
- Pump and level control and monitoring of distinct filling levels
- Chemical, petrochemical industry, natural gas, offshore, shipbuilding, machine building, power generating equipment, power plants
- Process water and drinking water treatment
- Freely selectable switch position through fixing the float switch at the required level
- Large range of application due to the simple, proven functional principle
- For harsh operating conditions, long service life
- Operating limits:
- Operating temperature: T = -30 … +150 °C
- Operating pressure: P = Vacuum up to 40 bar
- Limit density: ρ ≥ 600 kg/m3
Description of the Level switch
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.
The level switch is simple to mount and maintenance-free, so the costs of mounting, commissioning and operation are low.