---
title: "Pressure Sensing Element"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:PRESSURE_SENSING_ELEMENT"
  data_integrity_hash: "64adbdabbe6ce5faef293aa15110babc"
  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:PRESSURE_SENSING_ELEMENT"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/pressure-sensing-element.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/pressure-sensing-element"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-100 bar absolute pressure"
    unit: "MPa"
engineering_limits:
  max_safe_operating_point:
    value: 150
    unit: "bar"
    consequence: "Plastic deformation exceeding yield strength (σ_y = 250 MPa for 316L stainless steel, σ_y = 7 GPa for silicon) causing permanent dimensional change"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Pressure cycling at 0.5 Hz exceeding 10^7 cycles"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Finite element analysis optimization with stress concentration factor K_t &lt; 1.5"
  - node_2:
      trigger: "Process fluid crystallization at 25°C below saturation temperature"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "PTFE-coated diaphragm with contact angle &gt;110° and continuous 5 psi purge gas"
bom_nodes:
  diaphragm:
    type: "component"
    urn: "URN:CNFX:ME:DIAPHRAGM"
    interface_type: "physical-logic-coupled"
  strain-gauge:
    type: "component"
    urn: "URN:CNFX:ME:STRAIN_GAUGE"
    interface_type: "physical-logic-coupled"
  sealweld:
    type: "component"
    urn: "URN:CNFX:ME:SEALWELD"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 1127:1992 - STAINLESS STEEL TUBES FOR PRESSURE PURPOSES"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/pressure-sensing-element.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "bc1855b82007e61f0c1af679377f2ef860af3c3ce10f2852dbe450f7dd3df8e3"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Pressure Sensing Element

## 1. Technical Definition
The core component within a pressure sensor/transmitter that directly converts applied pressure into a measurable physical change.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-100 bar absolute pressure**. Failure boundary: **150 bar burst pressure for Bourdon tube, 200 bar for silicon diaphragm**, Mechanism: **Plastic deformation exceeding yield strength (σ_y = 250 MPa for 316L stainless steel, σ_y = 7 GPa for silicon) causing permanent dimensional change**.

### 2.1 Analytical Physics Model
Governed by the **Thin-Wall Pressure Vessel Stress Analysis**:

> **Primary Equation**: $\sigma_h = \frac{P \cdot D}{2t}$  
> **Engineering Impact**: Determines the hoop stress boundary to prevent rupture.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| P | Internal Pressure | Engineering Constant |
| D | Diameter | Engineering Constant |
| t | Wall Thickness | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Pressure cycling at 0.5 Hz exceeding 10^7 cycles | 8 | Fatigue crack propagation in diaphragm weld seam | Finite element analysis optimization with stress concentration factor K_t &lt; 1.5 |
| Process fluid crystallization at 25°C below saturation temperature | 8 | Diaphragm surface fouling increasing stiffness by 40% | PTFE-coated diaphragm with contact angle &gt;110° and continuous 5 psi purge gas |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Pressure Calibration System**, **Clean Room Assembly Station**, **Hermetic Sealing Machine**  
**Downstream Applications**: Industrial Pressure Transmitters, Process Control Instruments, Medical Ventilator Sensors  

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

### Q: What materials are best for pressure sensing elements in harsh industrial environments?
**A**: Stainless steel offers excellent corrosion resistance for harsh environments, while ceramic provides superior chemical resistance and thermal stability for extreme conditions.

### Q: How does the diaphragm design affect pressure sensing element performance?
**A**: The diaphragm's thickness, material, and geometry determine sensitivity, linearity, and pressure range - thinner diaphragms increase sensitivity but reduce maximum pressure capacity.

### Q: What maintenance considerations exist for pressure sensing elements in machinery?
**A**: Regular inspection of seals/welds for leaks, monitoring for diaphragm deformation, and ensuring proper media compatibility are essential for maintaining accuracy and longevity.

## 6. Manufacturing Compliance
- ISO 1127:1992 - STAINLESS STEEL TUBES FOR PRESSURE PURPOSES

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Pressure Sensing Element](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/pressure-sensing-element)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: PRESSURE_SENSING_ELEMENT | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 35577dd7
