Glandless magnetic transmission
Dual permanent Alnico magnets transmit motion through the wall, so there is no leakage path from vessel to switch housing.
Magnetic float switch
Side Mounted Float Level Switch
A magnetic float sits beside the vessel and changes the switch state as the level crosses its set point. It is useful when top access is limited or a long probe is not practical.
- Repeatability
- ± 2 mm
- Max. pressure
- 20 kg/cm²
- Max. temperature
- 350 °C
- Switching capacity
- 6 A, 230 V AC
Overview
A level switch for tanks with limited top access
A magnetic float sits beside the vessel and changes the switch state as the level crosses its set point. It is useful when top access is limited or a long probe is not practical.
It employs dual magnets, one linked with the float arm and other by the contact carriers housed in the switch enclosure. Change in the liquid level brings the like poles of dual magnets opposite to each other and the resulting repulsion force ensures a changeover of contacts with snap action.
The magnetic transmission is glandless, so there is no scope of leakage from the vessel into the switch housing.
Internal or external mounting
Mount inside the tank, or externally through a chamber or cage where stirrers operate or servicing needs isolation.
Wide material range
SS 304, SS 316, SS 316L, PP and PTFE floats and wetted parts, to suit a broad range of media.
Built for the environment
Designed for high repeatability and to minimise the effects of shock, vibration and pressure.
Specifications
Standard model; special designs for higher pressures on request
| Installation | Side / top for special applications |
|---|---|
| Switching enclosure | Cast aluminium, weatherproof to IP 56 / IP 65 or ex-proof for Gr. II A and II B or II C |
| Electrical connection | Brass, 3/4" ET / 1/2" NPT |
| Float | SS 304 / SS 316 / SS 316L / PP / PTFE |
| Min. specific gravity | 0.6 depending upon float material and dimensions |
| Process connection | 40, 50, 65 or 80 mm flanged as per ASA 150# |
| Switch | Micro (max. temp. 150 °C) |
| Switching capacity | 6 Amp, 230 V AC |
| Repeatability | +/- 2 mm |
| Load / insulation | Resistive / 150 mega ohms at 500 V DC |
| Max. pressure | Up to 20 kg/cm² at ambient temp. Special design available for higher pressures |
| Max. temperature | Up to 350 °C depending upon float material and switch elements |
| Mounting | Internal and external mounting through a chamber / cage |
External mounting is preferred where space is a limiting factor or mechanical devices like stirrers operate in the tank. In applications like boilers and reaction kettles, external mounting ensures isolation for servicing. The switch can be wired directly to make or break electrical circuits of burners, heaters, motor-pumps and alarms.
Tell us where the switch will sit
Share the tank connection, medium, level set point, pressure and temperature. We will confirm the float and switch arrangement.
- Fluid, specific gravity and concentration
- Flow or level range, and line size
- Operating pressure and temperature
- Material of construction and end connection
- Output, display and area classification