In complex industrial environments, accurate pressure measurement is vital—but not every application is suitable for a standard pressure gauge. When working with corrosive, viscous, slurry, or hygienic media, engineers need a more robust and protected solution: the diaphragm sealed pressure gauge.
Designed to provide precision measurement while isolating the sensing mechanism from challenging media, this type of industrial pressure gauge is essential in chemical processing, food and beverage production, pharmaceuticals, wastewater, and pulp & paper industries.

What is a Diaphragm Sealed Pressure Gauge?
A diaphragm sealed pressure gauge, also known as a chemical resistant pressure gauge or hygienic pressure gauge, incorporates a flexible diaphragm between the pressure-sensing element and the process medium. This diaphragm, typically made from stainless steel, PTFE, or Hastelloy, transmits pressure to a fill fluid inside the gauge, enabling accurate readings without exposing the internal mechanism to harsh media.
This setup ensures:
• Protection from corrosive or clogging media
• Accuracy even in high viscosity or solid-laden fluids
• Easier cleaning in sanitary applications
• Longer gauge lifespan with reduced maintenance

Applications of Diaphragm Sealed Gauges in Industry
Engineers often specify pressure gauges with diaphragm seals in applications where traditional gauges would fail due to clogging, corrosion, or contamination risk. Common industries include:
1. Chemical and Petrochemical
Handles aggressive acids, bases, and solvents—ideal as a corrosive media pressure gauge.
2. Pharmaceutical and Food Processing
Used in CIP/SIP systems and sterile environments where hygiene is crucial. A perfect fit as a sanitary pressure gauge or hygienic pressure gauge.
3. Wastewater and Slurry Handling
Prevents clogging and material buildup when monitoring sludges or slurries. Known as a sealed pressure gauge for slurry.
4. Viscous or Crystallizing Fluids
Avoids damage and measurement lag in heavy or sticky media—great as a high viscosity media pressure gauge.

Key Features and Benefits
✅ Isolation from Process Media – No direct contact between gauge internals and media
✅ Corrosion and Contamination Resistance – Diaphragm materials can be selected to resist specific chemicals
✅ Customizable Mounting – Available in bottom, back, or remote (capillary) configurations
✅ Wide Pressure Range – Typically 0–10 bar up to 0–400 bar
✅ Material Flexibility – Diaphragms in SS316L, Monel, Hastelloy, or PTFE depending on application
✅ Compliant with Standards – For sanitary models, can meet FDA or 3A requirements

Selecting the Right Diaphragm Sealed Pressure Gauge
When choosing a diaphragm sealed pressure gauge, engineers must consider:
• Media Type: Corrosive, viscous, or particulate-laden?
• Temperature Range: Some fill fluids are heat-sensitive
• Accuracy Requirements: Choose the right grade based on criticality
• Mounting Needs: Direct or remote mounting with capillary
• Process Connection: Flanged, threaded, or tri-clamp?
Matching these parameters ensures long-term gauge performance and accurate pressure readings, even in the most difficult process conditions.

Why ARCUS INDUSTRIES?
At ARCUS INDUSTRIES, we offer high-performance diaphragm sealed pressure gauges built to thrive in demanding environments. Our gauges are engineered with:
• Chemical-resistant materials for long life
• Hygienic designs for cleanable, contamination-free service
• Robust diaphragms to withstand process pressure and temperature
• Custom seal options to fit any process connection
Whether you’re looking for a pressure gauge for clogging media, a sanitary gauge for food plants, or a chemical-resistant pressure gauge, ARCUS provides reliable and accurate solutions.

Conclusion
In industries where process media pose a threat to standard instrumentation, the diaphragm sealed pressure gauge is the go-to solution. Its protective design ensures accurate measurement, long service life, and reduced downtime—making it an essential part of every engineer’s toolkit.
Explore ARCUS INDUSTRIES’ range of sealed pressure gauges and choose the best-fit solution for your toughest process challenges.