---
title: "Temperature &amp; pH Probes"
industry: "Chemical Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:TEMPERATURE_PH_PROBES"
  data_integrity_hash: "0e22b7140cdf4431f0d8e9e72fe67d0e"
  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:TEMPERATURE_PH_PROBES"
  data_source_uri: "https://cnfx.com/llms/industry/chemical-manufacturing/product/temperature-ph-probes.md"
  official_resource_url: "https://cnfx.com/industry/chemical-manufacturing/product/temperature-ph-probes"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-150°C temperature, 0-14 pH"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 150
    unit: "°C"
    consequence: "Thermal degradation of pH-sensitive glass membrane (silicate hydrolysis) and temperature coefficient mismatch between Nernst equation (59.16 mV/pH at 25°C) and reference electrode potential"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Electrolyte depletion in reference electrode (Ag/AgCl/KCl)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Double-junction reference electrode with 3.0 M KCl gel electrolyte and ceramic frit diffusion barrier"
  - node_2:
      trigger: "Thermal shock from &gt;10°C/minute temperature gradient"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hastelloy C-276 sheath with boron silicate glass (Coefficient of Thermal Expansion 3.3×10^-6/°C) matched to Inconel 625 housing"
bom_nodes:
  ph-electrode:
    type: "part"
    urn: "URN:CNFX:ME:PH_ELECTRODE"
    interface_type: "physical-logic-coupled"
  temperature-sensor:
    type: "part"
    urn: "URN:CNFX:ME:TEMPERATURE_SENSOR"
    interface_type: "physical-logic-coupled"
  probe-body-sheath:
    type: "component"
    urn: "URN:CNFX:ME:PROBE_BODY_SHEATH"
    interface_type: "physical-logic-coupled"
  cable-connector:
    type: "component"
    urn: "URN:CNFX:ME:CABLE_CONNECTOR"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING - DIRECTIVE 2014/35/EU (LOW VOLTAGE DIRECTIVE)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/chemical-manufacturing/product/temperature-ph-probes.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "7e69d6aaed79a2a208030265f6d3d1b64d16bd8aa182ff5dcb0b92355238e2e5"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Temperature &amp; pH Probes

## 1. Technical Definition
Integrated sensor assembly for simultaneous monitoring of temperature and pH levels within a neutralization reactor.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-150°C temperature, 0-14 pH**. Failure boundary: **Temperature &gt; 150°C causes glass membrane dissolution at pH &gt; 12, pH sensor drift &gt; ±0.5 pH units beyond 80°C**, Mechanism: **Thermal degradation of pH-sensitive glass membrane (silicate hydrolysis) and temperature coefficient mismatch between Nernst equation (59.16 mV/pH at 25°C) and reference electrode potential**.

### 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 |
| :--- | :--- | :--- | :--- |
| Electrolyte depletion in reference electrode (Ag/AgCl/KCl) | 8 | pH reading drift &gt; 2.0 pH units/hour | Double-junction reference electrode with 3.0 M KCl gel electrolyte and ceramic frit diffusion barrier |
| Thermal shock from &gt;10°C/minute temperature gradient | 8 | Glass membrane fracture at stress &gt; 50 MPa | Hastelloy C-276 sheath with boron silicate glass (Coefficient of Thermal Expansion 3.3×10^-6/°C) matched to Inconel 625 housing |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [pH Electrode](https://cnfx.com/llms/industry/chemical-manufacturing/product/ph-electrode.md) `(Standalone System)`
- [Temperature Sensor](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/temperature-sensor.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Process Control System**, **Calibration Station**, **Data Acquisition Unit**  
**Downstream Applications**: Neutralized Chemical Solutions, pH-Adjusted Industrial Products, Temperature-Stabilized Chemical Compounds  

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

### Q: What materials make this probe suitable for chemical manufacturing environments?
**A**: The probe features 316L stainless steel housing for corrosion resistance, pH-sensitive glass membrane for accurate pH measurement, and platinum RTD or Type J/K thermocouple elements for temperature monitoring in harsh chemical environments.

### Q: How does this integrated probe benefit neutralization reactor monitoring?
**A**: By combining temperature and pH sensors in one assembly, it provides simultaneous real-time data, reduces installation points, minimizes maintenance, and ensures synchronized measurements critical for precise neutralization control.

### Q: What maintenance is required for the reference electrode fill solution?
**A**: The KCl reference electrode solution requires periodic refilling or replacement depending on usage intensity and process conditions, typically every 3-12 months, to maintain accurate pH measurements and prevent electrode drift.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS
- CE MARKING - DIRECTIVE 2014/35/EU (LOW VOLTAGE DIRECTIVE)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Temperature &amp; pH Probes](https://cnfx.com/industry/chemical-manufacturing/product/temperature-ph-probes)**

### 🌐 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**: TEMPERATURE_PH_PROBES | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 885d6252
