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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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Cone Differential Pressure Flow Meter
Accuracy
±0.5%
±0.5%
Size
12...609 mm
1/2...24 in.
Repeatability
± 0.1% or better
± 0.1% or better
CV Series Venturi Flow Meter
Availability
Discontinued
Discontinued
Size
50...406 mm
2...16 in.
Temperature Range
Up to 120° C
Up to 250° F
Flow Range
11...75,708 lpm
3...20,000 gpm
V-Brass Series Venturi Low Pressure Loss Flow Meter
Availability
Discontinued
Discontinued
Size Range
12...50 mm
1/2...2 in.
Temperature Range
Up to 120° C
Up to 250° F
Flow Range
0.95...56.8 lpm
0.25...15 gpm
Ellipse® PFA Fire Pump System
Availability
Discontinued
Discontinued
Size
50...406 mm
2...16 in.
Temperature Range
Up to 82° C
Up to 180° F
Pressure Range
Up to 34 bar
Up to 500 PSI
Model PFB Annular Round Fire Pump System
Availability
Discontinued
Discontinued
Temperature Range
Up to 82° C
Up to 180° F
Pressure Range
Up to 34 bar
Up to 500 PSI
Accuracy
±3%
±3%
Venturi PFV Fire Pump System
Availability
Discontinued
Discontinued
Size Range
50...406 mm
2...16 in.
Temperature Range
Max. 120° C
Max. 250° F
Pressure Range
Max. 20 bar
Max. 300 PSI
GM Portable Gauge Kit
Availability
Discontinued
Discontinued
Accuracy
±1.5%
±1.5%
GMD Gauge
Availability
Discontinued
Discontinued
Temperature Range
Up to 82° C
Up to 180° F
Pressure Range
Up to 34 bar
Up to 500 PSI
Accuracy
±1.75%
±1.75%
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%

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Our Technology

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

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