Mobrey Side Mount Level Switch SPDT Output

  • RS庫存編號 185-9847
  • 製造零件編號 SMA1
  • 製造商 Mobrey
COO (Country of Origin): GB

Industrial Miniswitch

Mobrey M-Switch. Designed for alarm functions, this compact switch in 316 stainless steel utilises a micro-change switching mechanism activated magnetically as the float moves through the switching position. This float assembly rises and falls according to the liquid level. Ideal for use within condensate tanks, header tanks, storage tanks or for providing an alarm for low levels of lubricating oils or fuels. The mini switch can be side mounted or in an external chamber. The M-Switch has excellent construction and is highly reliable.

25mm switching differential
SG of liquid; 0.75min.
Mounting arrangement Mobrey 'A' flange
Available as standard or ATEX approved (Flameproof ATEX 11 1/2G EExd IIc T6, IP66/IP67)
NOT suitable for direct pump control (unless 2 switches are used)

Mobrey M-Switch SMA1
Float Operated Liquid Level Switch


• Highly reliable
• Excellent construction
• Available for side mounting with either a flanged or 2-in. threaded connection
• Reliably detects the liquid level to give a voltage free contact operation for alarm signalling or as part of a pump control system


• Minimum liquid specific gravity: 0.75
• Differential: 1in (25mm)
• Length into tank: 6in (153mm)
• Float diameter: 1.9in (48mm)
• Maximum float swing: 4.4in (112mm)
• Switching function: SPCO (Single-Pole-Change-Over) relay
• Ambient temperature: 32 to 140 °F (0 to 60 °C)

Note: The microswitch contacts are gold-plated and are suitable for use in low-power circuits. Switching high-power circuits can permanently damage the gold-plating. Not suitable for the direct starting of large motors.

Typical Applications:

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


ATEX (Flameproof ATEX 11 1/2G EExd IIc T6, IP66/IP67)

Attribute Value
Device Type Level Alarm Switch
Mounting Type Side Mount
Switch Output SPDT
Body Material Stainless Steel
Minimum Operating Temperature 0°C
Maximum Operating Temperature +130°C
Maximum Current 15 A ac, 250 mA dc
Maximum Pressure 19bar
Gasket Material Non Asbestos Carbon Fibre