---
title: "Protective Housing/Probe"
industry: "Computer, Electronic and Optical Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:PROTECTIVE_HOUSINGPROBE"
  data_integrity_hash: "96b0d30550c0e126f35377c4370947e2"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:PROTECTIVE_HOUSINGPROBE"
  data_source_uri: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/protective-housingprobe.md"
  official_resource_url: "https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/protective-housingprobe"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-150°C, 0-10 bar, 0-100% relative humidity"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 0.002
    unit: "strain"
    consequence: "Coefficient of thermal expansion mismatch between 316L stainless steel housing (17.3 μm/m·K) and alumina ceramic probe (8.1 μm/m·K) causing interfacial delamination, yielding at 205 MPa von Mises stress, electrochemical corrosion at &gt;60% RH with chloride concentration &gt;50 ppm"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Thermal cycling between -40°C and 150°C at 10°C/min gradient"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Active thermal management maintaining ΔT&lt;5°C/min, graded CTE transition layers (Kovar alloy at 5.3 μm/m·K), hermetic laser welding with 0.05 mm penetration depth"
  - node_2:
      trigger: "Particulate abrasion from 15 μm alumina particles at 30 m/s flow velocity"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Sintered metal filter with 5 μm pore size, sacrificial wear sleeve of silicon carbide (HV 2800), redundant sensing arrays with 120° radial offset"
bom_nodes:
  probe-tipsensing-element:
    type: "component"
    urn: "URN:CNFX:ME:PROBE_TIPSENSING_ELEMENT"
    interface_type: "physical-logic-coupled"
  gas-permeable-membrane:
    type: "component"
    urn: "URN:CNFX:ME:GAS_PERMEABLE_MEMBRANE"
    interface_type: "physical-logic-coupled"
  housing-body:
    type: "component"
    urn: "URN:CNFX:ME:HOUSING_BODY"
    interface_type: "physical-logic-coupled"
  electrical-connector:
    type: "component"
    urn: "URN:CNFX:ME:ELECTRICAL_CONNECTOR"
    interface_type: "physical-logic-coupled"
  sealing-gaskets:
    type: "component"
    urn: "URN:CNFX:ME:SEALING_GASKETS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/protective-housingprobe.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "3072a6d857af2eb65fabeb0df5b3ff41656faf03ce600fd901e756ef0d7bf7e7"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Protective Housing/Probe

## 1. Technical Definition
A protective enclosure and sensing element assembly for oxygen sensors/analyzers.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-150°C, 0-10 bar, 0-100% relative humidity**. Failure boundary: **Thermal expansion mismatch exceeding 0.002 strain at 180°C, pressure differential exceeding 12 bar, moisture ingress at 0.1 mm crack width**, Mechanism: **Coefficient of thermal expansion mismatch between 316L stainless steel housing (17.3 μm/m·K) and alumina ceramic probe (8.1 μm/m·K) causing interfacial delamination, yielding at 205 MPa von Mises stress, electrochemical corrosion at &gt;60% RH with chloride concentration &gt;50 ppm**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Thermal cycling between -40°C and 150°C at 10°C/min gradient | 8 | Ceramic-to-metal seal fracture propagating 0.5 mm radial cracks | Active thermal management maintaining ΔT&lt;5°C/min, graded CTE transition layers (Kovar alloy at 5.3 μm/m·K), hermetic laser welding with 0.05 mm penetration depth |
| Particulate abrasion from 15 μm alumina particles at 30 m/s flow velocity | 8 | Zirconia sensing element erosion reducing active surface area by 40% | Sintered metal filter with 5 μm pore size, sacrificial wear sleeve of silicon carbide (HV 2800), redundant sensing arrays with 120° radial offset |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Calibration Gas System**, **Environmental Test Chamber**, **Leak Testing Equipment**  
**Downstream Applications**: Medical Oxygen Analyzers, Industrial Process Control Systems, Environmental Monitoring Equipment  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are used in this protective housing/probe assembly?
**A**: The assembly uses 316L stainless steel for the housing body, alumina ceramic for the probe tip/sensing element, PTFE/Teflon for sealing gaskets, and glass components, ensuring durability and chemical resistance in electronic manufacturing environments.

### Q: What are the key components in the BOM for this oxygen sensor assembly?
**A**: The bill of materials includes: Electrical Connector, Gas Permeable Membrane, Housing Body, Probe Tip/Sensing Element, and Sealing Gaskets, designed for precise oxygen measurement in computer and optical product manufacturing.

### Q: Why is 316L stainless steel used for the housing in electronic manufacturing applications?
**A**: 316L stainless steel offers excellent corrosion resistance, particularly against chlorides and chemicals common in electronics manufacturing, while providing structural integrity for the oxygen sensor's protective enclosure.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Protective Housing/Probe](https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/protective-housingprobe)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **5** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: PROTECTIVE_HOUSINGPROBE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 0afb9bd4
