Flow Alarms & Switches – MPB Industries

Series FA10 Ultra Low Flow Alarm

Christine — Thu, 09 Oct 2025 14:06:31 +0000

The MPB Series FA10 Ultra Low Flow Alarm is designed to give a visual indication of flow and also a switched output at pre-determined flows as low as 25cc/min H₂0 (1.5 L/hr). The FA10 is a low-pressure drop device and can be positioned either in-line or on a bypass system for low viscosity liquid flows. Typical uses include pump failure, detection of filter blockages and process medium failure etc. The FA10 is ideal for use in the water treatment industry where the materials of construction are particularly suited for these applications and would also be suitable for most industrial applications. The standard switch operation is normally open below the flow set point. Above the set point the switch will be closed. Standard switching points are1.5 L/hr, 2.5 L/hr and 5 L/hr. Alternative ranges are available on request.

Series FA20 Flow Alarm

Jamie Burchell — Wed, 03 Sep 2025 12:15:49 +0000

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. Standard switching points are 25 L/hr, 50 L/hr, 100 L/hr and 150 L/hr. Alternative ranges are available on request.

Series FA50 Flow Alarm

Jamie Burchell — Wed, 03 Sep 2025 12:15:49 +0000

Features

Adjustable alarm/set point
Latching contact mechanism
Standard, or customised flow scales
Easy in-situ tube removal
RPVC, OR STAINLESS STEEL CONNECTIONS
Frictionless, hence low head loss
Can be supplied with CV100 Flow Control Valve and Mounting Bracket

Specification

Chassis: White epoxy coated aluminum
End Blocks: Rigid PVC, 303 Stainless steel
Process Connections: ¼” BSPPF
Cover: Polycarbonate
Seals: Nitrile, Viton, EPDM, etc
Metering Tube: Borosilicate glass
Scale: Permanently fired black ceramic
Float: Rigid PVC, or 316 Stainless steel
Weight: 550 grams (approx.)
Maximum Working Pressure: 10 bar g (non-shock)
Maximum Working Temperature: 60⁰C Nitrile, 100⁰C Viton
Accuracy: ± 5% FSD predicted
Optional Alarm Rating: 0.5 A <50V AC, 10VA Max. 0.5 A <75V DC, 10W Max. Contacts N/O
Connection: 2 metre flying lead, or supplied to customer required length
Flow reading: To be taken from scale, level with top float

Series FA60 Flow Alarm

Jamie Burchell — Wed, 03 Sep 2025 12:16:12 +0000

Features

Instantaneous alarm signal
Standard range of alarm settings
Easy tube removal in-situ
Frictionless, hence low head loss
Dual switch option available

Specification

Chassis: Anodised aluminum to BSEN12373/AA25
End Connections: Glass filled nylon
Process Connections: ½” BSPPF
Cover: Polycarbonate
Seals: Viton
Metering Tube: Borosilicate glass
Scale: Permanently fired black ceramic
Float: Brass
Weight: 600 grams
Maximum Working Pressure: 10 bar g (non-shock)
Maximum Working Temperature: 100⁰C
Maximum Ambient Temperature: 60⁰C
Switch Rating: 240VAC maximum, 3A maximum, 100VA maximum
Ranges: Switch at 1, 2, 4, 5, 8, 10, 12 or 24 L/min
Power Supply Lead: 1 metre long (no isolation)

Series FA350 Flow Alarm

Jamie Burchell — Wed, 03 Sep 2025 12:15:50 +0000

Features

Standard and customised flow scales
Metric scale. Plain scale plate for customer calibration can be supplied
Suitable for in-line, or panel mounting
Guided floats are used on all ranges giving a stable reading
Can be supplied with flanges
Easy in-situ tube removal and re-installation
Calibration can be supplied
Rear of panel mounting kit supplied complete with bezel and all mounting accessories
Straight through, or panel mounting

Specification

Chassis: Anodised aluminium to BSEN12373/AA25
End Blocks: Rigid PVC, or Stainless Steel
Process Connections: 1½” BSPPF
Cover: Polycarbonate
Seals: Nitrile, Viton, EPDM, etc
Metering Tube: Fully stress relieved borosilicate glass with permanently fired black enamel metric scale 170mm long
Scale: Adjustable calibrated scale (blank scale if required). Permanently fired black ceramic
Floats: Red hard anodised aluminium, Stainless steel
Weight: 4.5kg (typical)
Maximum Working Pressure: Gas: 4 bar g (non-shock), Liquid: 6 bar g (non-shock)
Maximum Working Temperature: 600C Nitrile, 100°C Viton
Accuracy: ± 5% FSD predicted
Optional Alarm Rating: 0.5 A <50V AC, 10VA Max., 0.5 A <75V DC, 10W Max, Contacts N/O
Connection: 2 metre flying lead, or to customer specification

Series FA140 and FA280 Variable Area Flowmeter/Alarm

Jamie Burchell — Wed, 03 Sep 2025 12:15:50 +0000

Features

Direct reading of instantaneous flow rate
Easy to read
Easy in-situ tube removal
Complete with flow control valve
Simple latching alarm device
Switches up to 5 AMP resistive load
Straight through, or rear facing connections

Specification

Chassis: Anodised aluminium to BSEN12373/AA25
End Blocks: Ni plated brass, or 303 Stainless steel
Process Connections: FA140: ¼” BSPPF, FA280: ½” BSPPF
Valve: 316 Stainless steel
Cover: Polycarbonate
Metering Tube: Borosilicate glass
Scale: Permanently fired black ceramic
Float: Rigid PVC, or 316 Stainless Steel
Weight: FA140: 800 grams, FA280: 1500 grams
Maximum Working Pressure:
Gas: 6 bar g (non-shock)
Liquid: 10 bar g (non-shock)
Maximum Working Temperature: 60⁰C Nitrile, 100⁰C Viton
Accuracy: ± 5% FSD predicted
Switch rating: 240VAC 5 Amp resistive load or Optional Alarm Rating: 0.5 A <50V AC, 10VA Max., 0.5 A <75V DC, 10W Max, Contacts N/O
Connection: 2 metre flying lead