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Customer Care representatives are available by phone Monday–Friday, from 9am–5pm CST.

For sales & general inquiries
Municipal Water solutions: (800) 616–3837
Commercial & Industrial solutions: (877) 243–1010
Wyco Concrete solutions: (800) 233-9926

For product support
Municipal Water solutions: (800) 616–3837
Commercial & Industrial solutions: (877) 243–1010
Wyco Concrete solutions: (877) 243–1010

Contact a Customer Care Representative

We’ll get back to you within 24 hours or the following business day.

Prefer to call?
Customer Care representatives are available by phone Monday–Friday, from 9am–5pm CST.

For sales & general inquiries
Municipal Water solutions: (800) 616–3837
Commercial & Industrial solutions: (877) 243–1010
Wyco Concrete solutions: (800) 233-9926

For product support
Municipal Water solutions: (800) 616–3837
Commercial & Industrial solutions: (877) 243–1010
Wyco Concrete solutions: (877) 243–1010

Differential Pressure Flow Meters

Differential Pressure (DP) flow meters introduce a constriction in the pipe that creates a pressure drop across the flow meter. This technology is suitable for applications, including DP measurement across filters, heat exchangers, backflow preventers, pipelines, ducts and more.

Differential Pressure Flow Meters

No Moving Parts. No Extensive Maintenance.

Differential pressure technology is a leading choice of measurement technology that provides a reliable and long-term solution. 

  • Minimal Maintenance. Has no moving parts, which virtually eliminates routine system maintenance for facility managers and other key stakeholders.
  • Custom Solutions. Available as a custom engineered solution specifically manufactured to fit within your system.
  • Application Flexibility. Suitable for a number of applications, including across filters, heat exchangers, backflow preventers, pipelines, ducts and more.

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How It Works

  • Measuring Principle
  • How It Measures
Measuring Principle
Measuring Principle

Differential pressure meters use Bernoulli’s equation to measure the flow of fluid within a pipe. Bernoulli’s equation determines that pressure drop across the constriction is proportional to the square of the flow rate.

How It Measures
How It Measures

Measures the flow of liquid within a pipe by introducing a constriction that creates a pressure drop. Pressure sensors measure the pressure before and after the constriction. The resulting pressure drop that occurs across the constriction is relative to the square of the flow rate; a higher pressure drop equals a higher flow rate.


Featured Product Lines

Preso

Preso®

Preso® Differential Pressure flow meters are precision-engineered to offer exceptional turndown ratios and superior accuracy. Designed to accommodate any manufacturer’s pressure transducer, the Preso family offers a complete line of primary flow elements including Pitot tubes, venturi meters and wedge meters.

Products

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Cone Differential Pressure Flow Meter
Size
12...609 mm
1/2...24 in.
Accuracy
±0.5%
±0.5%
COIN® Wedge, Flange Process by Flange Instrumentation (Model FF) Flow Meter
Size
12...1219 mm
1/2...48 in.
Temperature Range
Up to 815 °C
Up to 1500 °F
Pressure Range
Dependent on flange rating
Dependent on flange rating
Accuracy
(uncalibrated) ±3% (calibrated) ±0.5%
(uncalibrated) ±3% (calibrated) ±0.5%
Ellipse® AR Annular Flow Meter
Size
50…1820 mm
2...72 in.
Temperature Range
Up to 426 °C
Up to 800 °F
Flow Range
20…130,000 lpm
5.3...34,340 gpm
Pressure Range
Up to 55 bar
Up to 800 psi
Accuracy
±0.75%
±0.75%
Model LPL Venturi Low Pressure Loss Flow Meter
Size
13...1524 mm
1/2...60 in.
Temperature Range
Up to 815 °C
Up to 1500 °F
Flow Range
0.95...3,122,965 lpm
0.25...825,000 gpm
Pressure Range
Up to 620 bar
Up to 9000 PSI
Accuracy
(uncalibrated) ±3% (calibrated) Up to ±0.5%
(uncalibrated) ±3% (calibrated) Up to ±0.5%
Model SSM Venturi Nozzle Flow Meter
Size
13...1524 mm
1/2...60 in.
Temperature Range
Up to 815 °C
Up to 1500 °F
Flow Range
0.95...3,122,965 lpm
0.25...825,000 gpm
Pressure Range
Up to 620 bar
Up to 9000 PSI
Accuracy
(uncalibrated) ±1% (calibrated) Up to ±0.5%
(uncalibrated) ±1% (calibrated) Up to ±0.5%
Model SSL Venturi Classic Flow Meter
Size
13...1524 mm
1/2...60 in.
Temperature Range
Up to 815 °C
Up to 1500 °F
Flow Range
0.95...3,122,965 lpm
0.25...825,000 gpm
Pressure Range
Up to 620 bar
Up to 9000 PSI
Accuracy
(uncalibrated) ±0.75% (calibrated) Up to ±0.25%
(uncalibrated) ±0.75% (calibrated) Up to ±0.25%
COIN® Wedge Wafer (Model NW) Flow Meter
Size
13 - 101 mm
1/2" - 4"
Temperature Range
Up to 426°C
Up to 800°F
Pressure Rating
Dependent on flange rating
Dependent on flange rating
Accuracy
(uncalibrated) ± 3% (calibrated) ± 0,5%
(uncalibrated) ± 3% (calibrated) ± 0,5%
COIN® Back-to-Back Wedge (Model NN) Flow Meter
Size
12...152 mm
1/2...6 in.
Temperature Range
Up to 426 °C
Up to 800 °F
Pressure Range
Dependent on flange rating
Dependent on flange rating
Accuracy
(uncalibrated) ±3% (calibrated) ±0.5%
(uncalibrated) ±3% (calibrated) ±0.5%
COIN® Butt Weld Wedge (Model NB) Flow Meter
Size
12...406.4 mm
1/2...16 in.
Temperature Range
Up to 426 °C
Up to 800 °F
Pressure Range
Dependent on flange rating
Dependent on flange rating
Accuracy
(uncalibrated) ±3% (calibrated) ±0.5%
(uncalibrated) ±3% (calibrated) ±0.5%

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Contact a Customer Care Representative

We’ll get back to you within 24 hours or the following business day.

Prefer to call?
Customer Care representatives are available by phone Monday–Friday, from 9am–5pm CST.

For sales & general inquiries
Municipal Water solutions: (800) 616–3837
Commercial & Industrial solutions: (877) 243–1010
Wyco Concrete solutions: (800) 233-9926

For product support
Municipal Water solutions: (800) 616–3837
Commercial & Industrial solutions: (877) 243–1010
Wyco Concrete solutions: (877) 243–1010