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SMB1 Float Operated Level Switch

Features

  • Tough industrial build quality
  • 316 stainless steel construction
  • Flanged or threaded mounting
  • Small in-tank dimensions

    M - Switch:

  • Simple liquid level alarm
  • Traditional high reliability switching
  • European directive compliance

Description

Operated temperature 0c to +130c
Ambient temperature 0c to +60c
Min. S.G. 0.75
Differential 25mm
Length into tank 153mm
Float diameter 48mm
Max. Float swing 112mm
Switching function SPCO

Materials

Wetside: 316 stainless steel
Body:: 316 stainless steel
End Cover: 316 stainless steel
Gasket:  
A Flange 
 Non asbestos
D Flange 
 Ethylene prop
   
Conduct entry  
A, D flange M20
BSPT thread M20
NPT thread 1/2" NPT

Manufactured in 316 stainless steel throughout, the M-Switch is available for side mounting with either a flange or 2" thread. Comprising a small float on the wetside and a body containing a high current micro-switch on the dry side, the Mobrey M-Switch will reliably detect liquid level to give a voltage free contact operation for alarm signalling or as part of a pump control system.

Operation

One permanent magnet forms part of a float assembly which rises and falls with changing liquid level. A second permanent magnet is positioned within the switch so that the adjacent poles of the two magnets repel each other through the non-magnetic wall of the switch body.

A change of liquid level which moves the float through it's permissible travel will cause the float magnet to move and repel the switch magnet to give a snap-action operation of the micro-switch contacts.

Application

  • Low level alarms lubricating oils & fuel oils
  • Pump control duty in header tanks
  • High and low alarms in condensate tanks
  • Level and pump control in storage tanks

The M-Switch is designed for side mounting either direct in to vessel or in an external chamber. Choose a position where the effects of turbulence caused by agitators or inlets are minimised. The switch should be positioned so that the float may move freely over its full travel and not foul the sides, bottom or top of the tank. A flange or threaded boss is recommended for pressurised applications, designed such that the float is free to move over its full travel. Refer to installation leaflet for full details.
Rating
AC
DC (Res.)
DC (Ind.
Max. voltage V
250
250
250
Max. Current A
15
0.25
15mA
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