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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.

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COIN® Wedge Wafer
(Model NW) Flow Meter
Size
13...101 mm
1/2...4 in.
Temperature Range
Max. 426°C
Max. 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
Max. 426°C
Max. 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
Max. 426°C
Max. 800°F
Pressure Range
Dependent on flange rating
Dependent on flange rating
Accuracy
(uncalibrated) ±3% (calibrated) ±0.5%
(uncalibrated) ±3% (calibrated) ±0.5%
COIN® Flanged with NPT Pressure Taps (Model NF) Flow Meter
Size
12...1,219 mm
1/2...48 in.
Accuracy
(uncalibrated) ±3% (calibrated) ±0.5%
(uncalibrated) ±3% (calibrated) ±0.5%
COIN® Wedge, Flange Process by Flange Instrumentation (Model FF) Flow Meter
Size
12...1219 mm
1/2...48 in.
Temperature Range
Max. 815°C
Max. 1500°F
Pressure Range
Dependent on flange rating
Dependent on flange rating
Accuracy
(uncalibrated) ±3% (calibrated) ±0.5%
(uncalibrated) ±3% (calibrated) ±0.5%
Cone Differential Pressure Flow Meter
Size
12...609 mm
1/2...24 in.
Accuracy
±0.5%
±0.5%

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Our Technology

Learn about the differential pressure technology behind our Preso meters and how they work.

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Market Solutions

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