---
title: "Vacuum Gauge"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:VACUUM_GAUGE"
  data_integrity_hash: "ab5005c56c5695638b87f06eeec99de6"
  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:VACUUM_GAUGE"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/vacuum-gauge.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/vacuum-gauge"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "1e-6 to 1000 mbar (1e-4 to 1000 hPa)"
    unit: "mbar, Torr, Pa"
engineering_limits:
  max_safe_operating_point:
    value: 1.1
    unit: "e"
    consequence: "Pirani gauge: Thermal conductivity change beyond calibration range; Cold cathode gauge: Discharge extinction below 1e-2 mbar; Capacitance diaphragm gauge: Diaphragm rupture at 1500 mbar differential pressure"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Filament oxidation at 10^-4 mbar oxygen partial pressure"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Gold-plated tungsten filament with 0.1 mm diameter"
  - node_2:
      trigger: "Ion collector contamination accumulating 1e-8 g/cm² hydrocarbon deposits"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Titanium nitride coating with 2 μm thickness on collector surface"
bom_nodes:
  sensor-headtransducer:
    type: "part"
    urn: "URN:CNFX:ME:SENSOR_HEADTRANSDUCER"
    interface_type: "physical-logic-coupled"
  electronicscontroller-unit:
    type: "part"
    urn: "URN:CNFX:ME:ELECTRONICSCONTROLLER_UNIT"
    interface_type: "physical-logic-coupled"
  display-or-interface:
    type: "component"
    urn: "URN:CNFX:ME:DISPLAY_OR_INTERFACE"
    interface_type: "physical-logic-coupled"
  housingenclosure:
    type: "component"
    urn: "URN:CNFX:ME:HOUSINGENCLOSURE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 3567:2011 - VACUUM GAUGES - CALIBRATION BY DIRECT COMPARISON WITH A REFERENCE GAUGE"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/vacuum-gauge.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "6ee17c6a7ff933fc974c42eb77fcf366495c1c99305604e04ab6b2bdd160966a"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Vacuum Gauge

## 1. Technical Definition
A precision instrument that measures and displays the pressure level within a vacuum system.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **1e-6 to 1000 mbar (1e-4 to 1000 hPa)**. Failure boundary: **1.1e-6 mbar for ultra-high vacuum gauges, 1100 mbar for atmospheric pressure gauges**, Mechanism: **Pirani gauge: Thermal conductivity change beyond calibration range; Cold cathode gauge: Discharge extinction below 1e-2 mbar; Capacitance diaphragm gauge: Diaphragm rupture at 1500 mbar differential pressure**.

### 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 |
| :--- | :--- | :--- | :--- |
| Filament oxidation at 10^-4 mbar oxygen partial pressure | 8 | Thermocouple output drift exceeding ±5% of full scale | Gold-plated tungsten filament with 0.1 mm diameter |
| Ion collector contamination accumulating 1e-8 g/cm² hydrocarbon deposits | 8 | Secondary electron emission reducing ion current measurement by 30% | Titanium nitride coating with 2 μm thickness on collector surface |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mbar, Torr, Pa | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Sensor Head/Transducer](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/sensor-headtransducer.md) `(Standalone System)`
- [Electronics/Controller Unit](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/electronicscontroller-unit.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Vacuum Pump**, **Vacuum Chamber**, **Leak Detector**  
**Downstream Applications**: Semiconductor Wafers, Thin-Film Coatings, Medical Sterilization Equipment  

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

### Q: What materials are used in this vacuum gauge's construction?
**A**: This vacuum gauge features a stainless steel housing, glass or ceramic sensor envelope, tungsten or iridium filament for hot cathode models, and special alloys for the diaphragm to ensure durability and accuracy in industrial environments.

### Q: How does this vacuum gauge measure pressure in vacuum systems?
**A**: The gauge uses a sensor head/transducer that detects pressure changes within the vacuum system, with an electronics/controller unit processing the data and displaying results on the interface for precise monitoring in machinery manufacturing applications.

### Q: What are the key components in the vacuum gauge's bill of materials?
**A**: The BOM includes a display or interface for readouts, an electronics/controller unit for data processing, a housing/enclosure made of stainless steel for protection, and a sensor head/transducer for accurate pressure measurement in vacuum systems.

## 6. Manufacturing Compliance
- ISO 3567:2011 - VACUUM GAUGES - CALIBRATION BY DIRECT COMPARISON WITH A REFERENCE GAUGE

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Vacuum Gauge](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/vacuum-gauge)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: VACUUM_GAUGE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 31759770
