---
title: "Particulate Matter Sensor"
industry: "Computer, Electronic and Optical Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:PARTICULATE_MATTER_SENSOR"
  data_integrity_hash: "32856f18ab3ee15da32ec6b87121a818"
  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:PARTICULATE_MATTER_SENSOR"
  data_source_uri: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/particulate-matter-sensor.md"
  official_resource_url: "https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/particulate-matter-sensor"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-1000 μg/m³ with 1 μg/m³ resolution at 25°C, 101.325 kPa"
    unit: "μg/m³"
engineering_limits:
  max_safe_operating_point:
    value: "N/A"
    unit: "N/A"
    consequence: "Mie scattering principle disruption due to water film formation on laser window, altering refractive index from 1.52 (fused silica) to 1.33 (water), scattering cross-section reduction of 78%"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Laser diode current exceeding 120 mA for &gt;100 ms"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Current-limiting circuit with 100 mA hard limit and thermal shutdown at 85°C"
  - node_2:
      trigger: "Accumulation of PM2.5 particles &gt;1 mg/cm² on inlet filter"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Differential pressure sensor triggering at 50 Pa drop, initiating automatic backflush cycle"
bom_nodes:
  laser-diode:
    type: "part"
    urn: "URN:CNFX:ME:LASER_DIODE"
    interface_type: "physical-logic-coupled"
  photodetector:
    type: "part"
    urn: "URN:CNFX:ME:PHOTODETECTOR"
    interface_type: "physical-logic-coupled"
  optical-chamber:
    type: "part"
    urn: "URN:CNFX:ME:OPTICAL_CHAMBER"
    interface_type: "physical-logic-coupled"
  fanblower:
    type: "part"
    urn: "URN:CNFX:ME:FANBLOWER"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 14644-1:2015 CLEANROOMS AND ASSOCIATED CONTROLLED ENVIRONMENTS"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/ASHRAE 52.2-2017 METHOD OF TESTING GENERAL VENTILATION AIR-CLEANING DEVICES FOR REMOVAL EFFICIENCY BY PARTICLE SIZE"
    scope: "Verified Engineering Specification"
  - standard: "DIN EN 15267-3:2008 AIR QUALITY - CERTIFICATION OF AUTOMATED MEASURING SYSTEMS - PART 3: PERFORMANCE CRITERIA AND TEST PROCEDURES FOR AUTOMATED MEASURING SYSTEMS FOR MONITORING EMISSIONS FROM STATIONARY SOURCES"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/particulate-matter-sensor.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "f81664e22b17dc9dcdd2c9d63c9fd090796e178ce5fc423e05ab556982ef1d2f"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Particulate Matter Sensor

## 1. Technical Definition
A sensor that detects and measures particulate matter concentrations in air

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-1000 μg/m³ with 1 μg/m³ resolution at 25°C, 101.325 kPa**. Failure boundary: **&gt;95% relative humidity causes water condensation on optical surfaces, reducing light scattering detection below 10% of nominal signal**, Mechanism: **Mie scattering principle disruption due to water film formation on laser window, altering refractive index from 1.52 (fused silica) to 1.33 (water), scattering cross-section reduction of 78%**.

### 2.1 Analytical Physics Model
Governed by the **Combined Measurement Uncertainty**:

> **Primary Equation**: $u_c = \sqrt{\sum u_i^2}$  
> **Engineering Impact**: Defines the precision confidence interval for inspection.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| u_i | Standard Uncertainty components | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Laser diode current exceeding 120 mA for &gt;100 ms | 8 | Photodetector saturation at 5.0 V output, permanent gain reduction of 40 dB | Current-limiting circuit with 100 mA hard limit and thermal shutdown at 85°C |
| Accumulation of PM2.5 particles &gt;1 mg/cm² on inlet filter | 8 | Airflow reduction below 0.5 L/min, sampling error &gt;25% of true concentration | Differential pressure sensor triggering at 50 Pa drop, initiating automatic backflush cycle |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | μg/m³ | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Laser Diode](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/laser-diode.md) `(Standalone System)`
- [Photodetector](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/photodetector.md) `(Standalone System)`
- [Optical Chamber](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/optical-chamber.md) `(Standalone System)`
- [Fan/Blower](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/fanblower.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Calibration Gas Generator**, **Environmental Test Chamber**, **Data Acquisition System**  
**Downstream Applications**: Air Quality Monitoring Systems, HVAC Control Systems, Industrial Process Control Equipment  

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

### Q: How does this particulate matter sensor work in electronic manufacturing environments?
**A**: The sensor uses a semiconductor laser diode to illuminate particles in an optical chamber. A photodetector measures scattered light intensity, which correlates to particle concentration. This non-contact method provides real-time PM2.5/PM10 measurements without contaminating sensitive manufacturing areas.

### Q: What maintenance is required for industrial particulate matter sensors?
**A**: Regular maintenance includes cleaning the optical chamber to prevent buildup, calibrating the laser diode and photodetector every 6-12 months, and replacing the fan/blower as needed to maintain consistent airflow. The plastic housing protects internal components while allowing easy access for service.

### Q: Can this sensor integrate with existing manufacturing monitoring systems?
**A**: Yes, the sensor's PCB includes standard communication protocols (typically I2C, UART, or analog outputs) for seamless integration with facility monitoring systems, PLCs, and data loggers. This allows continuous air quality tracking alongside other production parameters in computer and optical manufacturing.

## 6. Manufacturing Compliance
- ISO 14644-1:2015 CLEANROOMS AND ASSOCIATED CONTROLLED ENVIRONMENTS
- ANSI/ASHRAE 52.2-2017 METHOD OF TESTING GENERAL VENTILATION AIR-CLEANING DEVICES FOR REMOVAL EFFICIENCY BY PARTICLE SIZE
- DIN EN 15267-3:2008 AIR QUALITY - CERTIFICATION OF AUTOMATED MEASURING SYSTEMS - PART 3: PERFORMANCE CRITERIA AND TEST PROCEDURES FOR AUTOMATED MEASURING SYSTEMS FOR MONITORING EMISSIONS FROM STATIONARY SOURCES

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Particulate Matter Sensor](https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/particulate-matter-sensor)**

### 🌐 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**: PARTICULATE_MATTER_SENSOR | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 82337c44
