INDUSTRY COMPONENT

Case & Lens

Protective housing and transparent cover for pressure gauge instruments

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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
  • 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
Standards
ISO 5171, DIN 16085, ASME B40.100

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Case & Lens.

pressure gauge case gauge lens instrument housing protective cover industrial pressure measurement bourdon tube protection Case & Lens Case & Lens in Machinery and Equipment Manufacturing

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

Interchangeable Parts

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

Buyer Feedback

★★★★☆ 4.8 / 5.0 (26 reviews)

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Case & Lens so far."

"Testing the Case & Lens now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

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Frequently Asked Questions

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.

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.

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.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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