Case & Lens: Diameter 40mm to 250mm, Lens Thickness 2mm to 6mm

Q: What is the difference between tempered glass and polycarbonate lenses?

Tempered glass offers superior scratch resistance and optical clarity but can shunder impact. Polycarbonate provides excellent impact resistance and lighter weight but may scratch more easily and degrade with UV exposure without coatings.

Q: Can gauge cases be customized for specific environments?

Yes, cases can be customized with special coatings (epoxy, powder), materials (Hastelloy, titanium), or designs for corrosive, explosive (Ex-rated), or high-vibration environments.

Q: How often should gauge lenses be inspected?

Lenses should be inspected during routine calibration (typically 6-12 months) for cracks, clouding, or seal degradation that could affect readability or protection.

Component Specifications

Definition

The case and lens assembly is a critical protective component of pressure gauges, consisting of a durable outer housing and a transparent viewing window. The case provides structural integrity, environmental protection, and mounting capabilities, while the lens allows visual reading of the pressure indicator while shielding the internal mechanism from contaminants, impacts, and harsh conditions. This component ensures measurement accuracy and instrument longevity in industrial applications.

Working Principle

The case provides mechanical protection and environmental sealing through robust construction and gasket systems, while the lens transmits light to enable clear visibility of the gauge dial. The assembly maintains internal pressure equilibrium with the environment (for non-sealed gauges) or provides complete isolation (for sealed gauges), preventing external factors from affecting the bourdon tube or diaphragm mechanism.

Materials

Case: Stainless steel (304/316), aluminum alloy, brass, or engineered plastics (polycarbonate, ABS). Lens: Tempered glass, polycarbonate, or acrylic with anti-glare/anti-fog coatings. Gaskets: Nitrile rubber, silicone, or Viton for sealing.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	40mm to 250mm
Mounting	Direct stem, surface, or panel mount
IP Rating	IP54 to IP68
Connection	1/4" NPT, 1/2" NPT, M20x1.5
Lens Thickness	2mm to 6mm
Pressure Rating	Atmospheric to 10,000 psi compatible

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 5171, DIN 16085, ASME B40.100

Parent Products

This component is used in the following industrial products

Pressure Gauge

A measuring instrument that monitors and displays the pressure within the Continuous Starch Hydrocyclone Separator system.

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Engineering Analysis

Risks & Mitigation

Lens fogging/condensation obscuring readings
Case corrosion compromising integrity
Gasket failure leading to contamination ingress
Impact damage causing lens breakage

FMEA Triads

Trigger: Improper gasket material selection
Failure: Fluid ingress damaging internal mechanism
Mitigation: Use chemical-compatible gaskets (Viton for oils, silicone for wide temp)

Trigger: Inadequate lens impact resistance
Failure: Lens fracture during operation
Mitigation: Specify polycarbonate or tempered glass with sufficient thickness

Trigger: Galvanic corrosion in dissimilar metal installations
Failure: Case degradation in corrosive environments
Mitigation: Use compatible metals or isolation techniques

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Case dimensions ±0.5mm, lens optical distortion <2%

Test Method

IP testing per IEC 60529, pressure cycling per ASME B40.100, impact testing per MIL-STD-810

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Case & Lens

Manufacturer profiles associated with Case & Lens.

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Frequently Asked Questions

What is the difference between tempered glass and polycarbonate lenses?