Flow Sensors and Switches


Large portfolio designed specifically for versatility and performance

High-quality, corrosion-resistant materials

Repeatable performance at low flows

For advice on finding the right valves and manifolds for your product design, contact our technical sales team on +44 (0) 1483 869 070 or email sales@hawco.co.uk with your design specification

Low Flow Rate Turbine Sensors

Ultra-compact TurboFlow® from Gems are low flow rate sensors provide continual measurement ranging from 0.1 to 8 GPM (0.5 to 30 lpm). Their Hall-effect sensor delivers accuracy to ±3 % of reading and 0.5 % repeatability. Lightweight, they mount in any position.

Series or Range Flow Rates
(GPM)
Type Body Material Inlet/Outlet Port Pulses Per Gallon Frequency Out
FT-110 0.13... 9.2 Low-Cost
Lightweight
Nylon 12 3/8" NPT Male,
G3/8 Male,
17mm Tube O-Ring
2,840... 26,200 16.7... 588 Hz Datasheet
FT-110M 0.53... 6.6 Robust
(up to 24 bar)
Brass 3/8" NPT Male,
G3/8 Male
3800... 15,900 50... 560 Hz Datasheet
FT-210 0.026... 0.65 Low Flow Nylon 12 1/4" NPT,
1/4" G
83,200 36.6... 917 Hz Datasheet
FT-330 0.2... 4 NSF Approved Noryl 3/8" NPT Male 4,994... 10,313 29... 343 Hz Datasheet

Piston-Type Inline Plastic Flow Switches

The FS-380P series of piston type flow switches is designed for low liquid flow rates (0.25 to 2.0 GPM)

Model Number Flow Settings
(GPM)
Media Material Connection
216445 (or 216446) 0.07 Polypropylene 3/8" NPT Male (or 1/4" QDC Male) Datasheet
209876 (or 203206) 0.15 Polypropylene 3/8" NPT Male (or 1/4" QDC Male) Datasheet
197081 (or 197091) 0.25 Polypropylene 3/8" NPT Male (or 1/4" QDC Male) Datasheet
197082 (or 197092) 0.50 Polypropylene 3/8" NPT Male (or 1/4" QDC Male) Datasheet
197083 (or 197093) 1.00 Polypropylene 3/8" NPT Male (or 1/4" QDC Male) Datasheet
197084 (or 197094) 1.50 Polypropylene 3/8" NPT Male (or 1/4" QDC Male) Datasheet
197085 (or 197095) 2.00 Polypropylene 3/8" NPT Male (or 1/4" QDC Male) Datasheet

Piston-Type Robust Inline Flow Switches - for High-Pressure Applications

The FS-380 series of piston type flow switches is designed for low liquid flow rates (0.15 to 2 GPM) and high-pressure applications such as industrial cleaning equipment. Made from brass or stainless steel, each compact and robust switch provides a simple design and reliable operation.

Model Number Flow Settings
(GPM)
Media Material Connection
181130 0.15 Water Brass 3/8" NPT Male Datasheet
193482 0.15 Water Stainless Steel 3/8" NPT Male Datasheet
192562 or
168432
0.25 Water Brass 1/2" NPT Male or
3/8" NPT Male
Datasheet
179992 or
177592
0.25 Water Stainless Steel 3/8" NPT Male or
3/8" Compression
Datasheet
168433 0.50 Water Brass 3/8" NPT Male Datasheet
179993 0.50 Water Stainless Steel 3/8" NPT Male Datasheet
192564 or
168434
1.00 Water Brass 1/2" NPT Male or
3/8" NPT Male
Datasheet
179994 or
177594
1.00 Water Stainless Steel 3/8" NPT Male or
3/8" Compression
Datasheet
179995 or
177595
1.50 Water Stainless Steel 3/8" NPT Male or
3/8" Compression
Datasheet
178353 2.00 Water Brass 3/8" NPT Male Datasheet

Shuttle Type Low Cost Flow Switches

Model Number Switch Actuation
Set Point (GPM)
Type Material Inlet/Outlet Ports
170231 0.25 FDA/NSF
Approved
Polypropylene 3/8" Female NPT Also available with
J-Box w/5A Relay
Datasheet
170232 0.50 FDA/NSF
Approved
Polypropylene 3/8" Female NPT Also available with
J-Box w/5A Relay
Datasheet
170233 1.00 FDA/NSF
Approved
Polypropylene 3/8" Female NPT Datasheet
175117 2.00 FDA/NSF
Approved
Polypropylene 3/8" Female NPT Datasheet
170234 2.50 FDA/NSF
Approved
Polypropylene 3/8" Female NPT Datasheet
170235 5.00 FDA/NSF
Approved
Polypropylene 3/8" Female NPT Datasheet

Other Piston Type Flow Switches

Piston-type flow switches are designed for low flow rates. Available in a variety of types to suit specific pressure applications or design parameters

Series or Range Water Set Point
(Air Set Point)
Type Body Material Inlet/Outlet Ports
FS-4 0.1... 1.5 GPM Molded Plastic Ryton® R4
Moulded Plastic
9/16˝ -18 UNF-2B Thread Datasheet
FS-150 0.5... 5.0 GPM Straight-Through
Flow Path
Polypropylene 1/2˝ NPT Male Datasheet
FS-480 0.5... 3.0 GPM Low Pressure
Drop
Stainless Steel 1/2˝ NPT Port,
3/4˝ NPT Port,
1/2˝ Tube Compression Fitting
Datasheet
FS-927 0.1... 1.5 GPM Miniature
Brass
Brass,
Stainless Steel
1/4˝ NPT Datasheet
FS-925 0.1... 1.5 GPM
(0.5... 25 SCFM)
General Purpose Brass or
Stainless Steel
1/4˝ NPT Datasheet
FS-926 50cc... 300cc/min
(2... 50 SCFH)
Low Flow Brass or
Stainless Steel
1/4˝ NPT Datasheet
FS-10798 0.5... 20 GPM
(1.0... 160 SCFM)
Externally
Adjustable
Brass or
Stainless Steel
1/2˝ NPT Datasheet
FS-930 0.1... 1.0 GPM
(oil)
Viscosity
Compensating
Brass 1/4˝ NPT Datasheet

Other Shuttle Type Flow Switches

Shuttle-type flow switches are designed for moderate to high flow rates.

Series or Range Water Set Point (GPM)
Type Body Material Inlet/Outlet Ports
FS-200 0.5... 100 Fixed
Straight-Through Flow Path
Bronze or Stainless Steel 1", 1-1/4", 1-1/2" or 2" NPT Datasheet
FS-200 Adjustable 1.0... 15.0 Externally Adjustable
Straight-Through Flow Path
Bronze 1˝ NPT Datasheet
FS-400 0.75... 10.0 Fixed
90° Flow Path
Bronze 3/4˝ NPT Datasheet
FS-400 Adjustable 0.75... 14.0 Externally Adjustable
90° Flow Path
Bronze 3/4˝ NPT Datasheet
FS-400P 0.5 or 2.0 Low-Cost
PVC 1/2˝ NPT,
3/4˝ IPS,
1˝ IPS
Datasheet
FS-500 0.25... 5.0 GPM Low-Cost
Polypropylene Pilot Duty,
J-Box w/5AA Relay
Datasheet

Other Flow Sensors & Switches

Highly visible, paddle wheel designs offer accurate visual indication, flow rate sensing and switching. The visual indication is combined with a choice of either pulsed DC output 0-10V DC analog or adjustable 1 Amp switched output. Available with brass, stainless steel or hydrolytically-stable polypropylene housings. Line sizes: 1/4˝ to 1˝ (.64 to 2.5 cm). Adjustable settings: 0.1 to 60 GPM (.38 to 227 l/m).

Series or Range Flow Settings GPM Media Material Connection
Paddle Wheel Flow Sensors: RotorFlow® Datasheet