Side Mounted Level Switch
Compact pivoted float switch for low, intermediate and high level alarms through the tank wall.
- Pressure
- Up to 100 bar
- Temperature
- Up to 300 °C
- Connections
- Flanged to ANSI, DIN or BS, size as required
Sigma Instruments CompanyMade in Mumbai
Level Switches
Pneumatic Level Switch
Float or displacer switch with a pneumatic 3/2 valve output, for areas where electrical switching is not wanted.
Technical dataStandard limits
- Pressure
- Up to 50 bar
- Temperature
- Up to 75 °C
- Connections
- Flanged to ANSI, DIN or BS, size as required
Units can be built to your specified pressure, temperature, range and material.
Available versions
- Side mounted, with or without cage
- Top mounted float or displacer, with or without cage
Typical applications
- Areas where electrical switching is not recommended
- Sites with no power supply
Product overview
Sigma pneumatic level switches are used where electrical switching is not recommended or no electricity is available. They work on the same principle as Sigma electrical switches, except that the magnet actuates a 3/2 valve for changeover. The system needs clean, filtered air at a minimum of 2 kg/cm², preferably through an air filter regulator.
Side mounted, with or without cage
The buoyancy of the liquid moves the float with the surface. The float movement pivots a magnet into the field of a like charged switch magnet, and as the two repel each other the switch magnet moves and actuates the valve.
Top mounted float or displacer, with or without cage
A float, or a spring loaded weighted displacer, rises with the level and lifts a magnetic sleeve inside a non magnetic enclosure tube. The sleeve attracts a pivoted magnet that actuates the switch mechanism outside the tube, and a falling level releases it again.
More Level Switches
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External Cage Level Switch
Cage mounted magnetic float switch with an anti vibration design, widely used in petroleum and power plants.
- Pressure
- Up to 200 bar
- Temperature
- Up to 400 °C
- Connections
- Flanged to ANSI, DIN or BS, size as required
Top Mounted Level Switch
Displacer type level controller with a fully isolated electrical compartment for severe service.
- Pressure
- Up to 200 bar
- Temperature
- Up to 400 °C
- Connections
- Flanged to ANSI, DIN or BS, size as required
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