FA20 Flow Alarm

PVC low-pressure dop device

The MPB Series FA20 Flow Alarm will give a switched output at a predetermined flow e.g. 1 L/min.

The FA20 is a low-pressure drop device and can be positioned either in-line or on a bypass system.

The MPB Series FA20 Flow Alarm will give a switched output at a predetermined flow e.g. 1 L/min.

The FA20 Flow Alarm is a low-pressure drop device and can be positioned either in-line or on a bypass system.

Typical uses include pump failure, detection of filter blockages and process medium failure etc. the FA20 Flow Alarm is ideal for use in the water treatment industry where the materials of construction are particularly suited for these applications.

The standard switch operation is N/O below the flow set point. Above the set point the switch will be closed.

The FA20 can be fitted with two independent switches if required.


MPB Series FA20 Features

· Instantaneous alarm signal

· Excellent corrosion resistance

· Visual indication of flow

· Latching contact

· Minimal maintenance, long service life





Body: Rigid PVC

Process Connections: ½” BSPPF or bored to suit, ½” NB plastic tubing

Seals: Viton

Sight Tube: Borosilicate glass

Scale: Permanently fired black ceramic

Weight: 150 grams

Maximum Working Pressure: 10 bar g (non-shock)

Maximum Working Temperature: 60°C 

Switch Rating: 100V max. 1 amp max. 10VA max. Resistive load

Contact Status: N/O

Connection: 2 metre flying lead

For information on how to order this device please see MPB's website: 


Series FA20 Flow Alarm