F5509/F6509 Differential Pressure Gauge

F5509/F6509 Differential Pressure Gauge

The Ashcroft® F5509 differential pressure gauge is used for monitoring differential pressure between two separate pressure sources.
The Ashcroft® F5509/F6509 gauges are ideal for differential pressure monitoring within harsh process environments. These stainless steel gauges provide high visibility, reliability, corrosion resistance and safety. Ideal solution for monitoring low differential pressures in applications such as flow measurement, tank level, filter monitoring, gas blanketing and leak detection.

Key Features

Extremely High static pressure limits

External zero adjustment

Flow measurement dial (optional)

Ability to attach to diaphragm seals

Electrical contacts (optional)

Rugged stainless steel construction

Markets & Applications

Pumps and Compressors

Chemical and Petrochemical


Food and Beverage

Oil and Gas

Level and Flow Measurement

Machine Automation

Water and Wastewater

Hydrogen and Technical Gases


  • Specifications
  • Downloads

Process Connection Location


Pressure Type

Differential pressure

Case Style

Open front case with blow out (S1)

Solid front with full rear blowout back (S3)




2" pipe mounting

Dial Size

100 mm

160 mm

Switch Style

Magnetic spring contacts

Inductive NAMUR contacts


1 ... 25 bar / 375 psi

16 mbar ... 600 mbar


Liquid fill

Wetted Parts Material

Stainless steel 316L (1.4404)

Static Pressure

up to PN40

Ingress Protection

IP66 / NEMA 4

Process Connection Style


Case or Body Material

Stainless steel 304 (1.4301)

Stainless steel 316L (1.4404)


1.6% of span (class 1.6)

1% of span (optional)

Data Sheets
Installation + Maintenance
Declaration of Conformity
Industry Brochures
Selection Guides
Product + Technical Information
Drawings + Models
Safety Data Sheets

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