Editorial Technical Reference

Sealed Enclosure

This page explains how Sealed Enclosure is classified within Computer, Electronic and Optical Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A hermetically sealed housing that provides controlled environmental isolation for sensitive calibration components.

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Sealed Enclosure in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Sealed Enclosure

Definition
The Sealed Enclosure is a critical component of the Integrated Calibration Chamber, designed to create and maintain a precisely controlled internal environment. It protects sensitive calibration instruments from external contaminants, temperature fluctuations, humidity variations, and electromagnetic interference, ensuring accurate and repeatable calibration measurements. The enclosure is manufactured from materials such as stainless steel (e.g. 304, 316), aluminum alloy, or specialty polymers like PTFE and PEEK, selected based on application requirements. It features a leak rate of ≤1×10⁻⁹ Pa·m³/s as verified by helium mass spectrometer testing per ISO 20485, ensuring high hermeticity. The internal volume ranges from 0.5 to 5 liters, and the operating temperature spans -40 to 85°C, with extended ranges possible using special seals. The enclosure achieves an IP rating of IP67 to IP68 per IEC 60529, providing dust-tight and immersion protection. Wall thickness varies from 2 to 5 mm, affecting mechanical strength and thermal conductivity, while surface finish is Ra 0.8–1.6 μm per ISO 4287 to minimize particle retention. Weight ranges from 1 to 10 kg depending on size and material thickness. Pressure rating is 0.1 to 1.0 MPa, with higher ratings possible in reinforced designs. Electrical connectors include hermetic feedthroughs with 8 to 24 pins for signal and power. The enclosure utilizes gaskets, seals, and specialized joining techniques to create an airtight, sometimes inert gas-filled barrier. It may incorporate viewports, feedthroughs, and access ports that maintain seal integrity while allowing necessary functionality. For procurement, verify model-specific values and standards with the legal manufacturer or supplier.
Working Principle
The enclosure achieves hermetic sealing through the use of gaskets, seals, and specialized joining techniques such as welding or brazing. These methods create an airtight barrier that prevents the ingress of contaminants and the egress of internal gases. The enclosure may be filled with an inert gas to further stabilize the internal environment. Viewports allow visual inspection, feedthroughs enable electrical connections, and access ports permit maintenance, all designed to preserve seal integrity. The sealing effectiveness is quantified by a helium mass spectrometer leak test, with a maximum leak rate of 1×10⁻⁹ Pa·m³/s per ISO 20485. The enclosure's design ensures that all penetrations maintain the required level of hermeticity, providing a controlled environment for sensitive calibration components.
Common Materials
Stainless Steel (e.g., 304, 316), Aluminum Alloy, Specialty Polymers (e.g., PTFE, PEEK)
Technical Parameters
ParameterTypical rangeNotes & selection driver
Internal Volume0.5–5 LSelect based on component size and required air gap.
Leak Rate≤1×10⁻⁹ Pa·m³/sHelium mass spectrometer test; lower is better for hermeticity.ISO 20485
Operating Temperature-40–85 °CExtended range available with special seals.
IP RatingIP67–IP68Dust-tight and protected against immersion.IEC 60529
Material316LStainless steel for corrosion resistance.ASTM A240
Wall Thickness2–5 mmAffects mechanical strength and thermal conductivity.
Surface FinishRa 0.8–1.6 μmSmoother finish reduces particle retention.ISO 4287
Weight1–10 kgDepends on size and material thickness.
Pressure Rating0.1–1.0 MPaInternal pressure capability; higher with reinforced design.
Electrical Connector8–24 pinsHermetic feedthroughs for signal/power.

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

Components / BOM
  • Main Body/Casing Part
    Primary structural frame providing the sealed volume.
    Material: Stainless Steel or Aluminum
  • Sealing Gasket/O-Ring Part
    Creates the airtight seal between mating surfaces (e.g., door and frame).
    Material: Silicone, Viton, EPDM, or Metal
  • Access Door/Hatch Part
    Removable panel for installing, maintaining, or accessing internal components while maintaining seal when closed.
    Material: Same as Main Body
  • Electrical Feedthrough
    Hermetically sealed connector allowing power/signal cables to pass into the enclosure without breaking the seal.
    Material: Stainless Steel, Glass, or Ceramic
  • Viewport Window Part
    Optically transparent, sealed window for visual inspection of internal components.
    Material: Tempered Glass or Polycarbonate

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 2 bar absolute
other spec: IP68/NEMA 6P ingress protection, 0% particulate ingress
temperature: -40°C to +85°C
Media Compatibility
✓ Dry inert gases (N2, Ar) ✓ Clean calibration fluids (ISO 4406 Class 6 or cleaner) ✓ Low-humidity air (<5% RH)
Unsuitable: Abrasive slurries or corrosive chemical environments
Sizing Data Required
  • Internal component volume/space requirements
  • Required number and type of feedthrough connections
  • Maximum allowable external dimensions/installation constraints

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Seal Degradation
Cause: Chemical attack from internal fluids or external contaminants compromising elastomer integrity, accelerated by temperature extremes and UV exposure.
Gasket Compression Set
Cause: Permanent deformation of sealing gasket due to excessive bolt torque during installation, thermal cycling, or material fatigue over time, leading to leakage paths.
Maintenance Indicators
  • Visible fluid weeping or residue around enclosure seams indicating seal failure
  • Audible hissing or pressure equalization sounds suggesting integrity loss
Engineering Tips
  • Implement torque-controlled installation procedures with calibrated tools to prevent gasket over-compression and ensure uniform sealing pressure
  • Establish environmental monitoring for temperature, humidity, and chemical exposure with scheduled seal material compatibility reviews

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ANSI/ISA 12.12.01 - Electrical Equipment for Hazardous Locations DIN EN 60529 - Degrees of Protection Provided by Enclosures (IP Code)

Quoted from the published standard.

Manufacturing Precision
  • Flatness: +/-0.1mm per 100mm
  • Sealing Surface Roughness: Ra 3.2μm max
Quality Inspection
  • IP Rating Water Ingress Test
  • Helium Leak Test for Hermetic Seals
Technical documentation
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Manufacturing capability
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Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
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Manufacturers of Sealed Enclosure

Manufacturer profiles associated with Sealed Enclosure.

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Frequently Asked Questions

What is the purpose of the Sealed Enclosure?

The Sealed Enclosure provides a controlled environment for sensitive calibration components, protecting them from contaminants, temperature changes, humidity, and electromagnetic interference to ensure accurate measurements.

What materials are available for the enclosure?

Materials on file include stainless steel (e.g., 304, 316), aluminum alloy, and specialty polymers such as PTFE and PEEK. The choice depends on application requirements like corrosion resistance and weight.

How is hermeticity verified?

Hermeticity is verified using a helium mass spectrometer leak test, with a maximum leak rate of 1×10⁻⁹ Pa·m³/s as per ISO 20485. This test ensures the enclosure meets the specified seal integrity.

What are the operating temperature and IP ratings?

The standard operating temperature range is -40 to 85°C, with extended ranges possible using special seals. The enclosure achieves an IP rating of IP67 to IP68 per IEC 60529, providing dust-tight and immersion protection.

Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Related equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Integrated Calibration Chamber
View system integration details

Industrial Ecosystem & Supply Chain Structure

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 12 October 2026

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