Industry-Verified Manufacturing Data (2026)

Sensor Head / Tube

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Sensor Head / Tube used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Sensor Head / Tube is characterized by the integration of Sensing Filament/Element and Tube Body/Housing. In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

The sensing element of a vacuum gauge that directly interacts with the vacuum environment to measure pressure.

Product Specifications

Technical details and manufacturing context for Sensor Head / Tube

Definition
A critical component of vacuum gauges that houses the sensing mechanism (such as a Pirani filament, thermocouple, or ionization source) and provides the interface between the measurement electronics and the vacuum chamber. It is designed to maintain vacuum integrity while accurately transmitting pressure-dependent signals.
Working Principle
The sensor head/tube contains the active sensing element whose physical properties (e.g., resistance, temperature, ionization current) change in response to gas pressure in the vacuum environment. These changes are measured by external electronics to determine the pressure.
Common Materials
Stainless Steel, Glass, Ceramic
Technical Parameters
  • Outer diameter and length of the tube for flange or connection compatibility. (mm) Customizable
Components / BOM
  • Sensing Filament/Element
    The core component whose property (resistance, temperature) changes with pressure.
    Material: Tungsten, Platinum, or Nickel
  • Tube Body/Housing
    Provides a vacuum-tight enclosure and mechanical connection to the system.
    Material: Stainless Steel or Glass
  • Electrical Feedthrough
    Provides electrical connection from the sensing element to external electronics while maintaining vacuum seal.
    Material: Ceramic or Glass
Engineering Reasoning
1e-9 to 1000 mbar (1e-12 to 100 Pa)
1.1e-3 mbar (1.1e-4 Pa) for thermal conductivity gauges, 1e-6 mbar (1e-7 Pa) for cold cathode gauges
Design Rationale: Ion bombardment erosion at 1e-6 mbar, thermal oxidation of tungsten filament above 1e-3 mbar
Risk Mitigation (FMEA)
Trigger Water vapor condensation at 273 K dew point
Mode: Ceramic insulator surface leakage current exceeding 10 μA
Strategy: Integrated Peltier cooling maintaining 283 K minimum operating temperature
Trigger Argon plasma formation at 13.56 MHz RF interference
Mode: Cathode sputtering rate exceeding 0.1 nm/hour
Strategy: Double-shielded coaxial cable with 60 dB RF attenuation at 13-14 MHz

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Sensor Head / Tube.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 1e-9 mbar to 1000 mbar (measurement range), 2 bar absolute (max pressure rating)
other spec: Flow rate: 0-10 L/min (gas), Slurry concentration: Not applicable (solid-free environments only)
temperature: -20°C to 150°C (operating), up to 200°C (short-term exposure)
Media Compatibility
✓ Clean dry gases (N2, Ar, He) ✓ High vacuum environments (UHV applications) ✓ Semiconductor process gases
Unsuitable: Corrosive/condensing environments (HCl, HF, water vapor at dew point)
Sizing Data Required
  • Required pressure measurement range (mbar/Torr)
  • Process gas composition and cleanliness
  • Required accuracy and response time

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Signal drift or loss
Cause: Internal electronic component degradation due to thermal cycling, moisture ingress, or vibration-induced fatigue, leading to unstable or absent output signals.
Physical damage or blockage
Cause: External impact, abrasive particle accumulation, or chemical corrosion compromising the sensor head/tube integrity, resulting in inaccurate readings or complete failure.
Maintenance Indicators
  • Inconsistent or erratic readings on the monitoring system, indicating potential signal instability.
  • Visible cracks, corrosion, or deformation on the sensor head or tube housing, suggesting physical compromise.
Engineering Tips
  • Implement regular calibration and environmental sealing checks to prevent moisture ingress and ensure signal accuracy.
  • Install protective shielding or mounting brackets to minimize vibration exposure and physical impacts from surrounding equipment.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 Quality Management Systems IEC 60529 Degrees of Protection Provided by Enclosures (IP Code) ASTM E1444/E1444M Standard Practice for Magnetic Particle Testing
Manufacturing Precision
  • Bore Diameter: +/-0.01mm
  • Surface Finish: Ra 0.4μm
Quality Inspection
  • Helium Leak Test
  • Dimensional Verification via CMM

Factories Producing Sensor Head / Tube

Verified manufacturers with capability to produce this product in China

✓ 94% Supplier Capability Match Found

T Technical Director from United Arab Emirates Jan 18, 2026
★★★★★
"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Sensor Head / Tube so far."
Technical Specifications Verified
P Project Engineer from Australia Jan 15, 2026
★★★★☆
"Testing the Sensor Head / Tube now; the technical reliability results are within 1% of the laboratory datasheet. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
S Sourcing Manager from Singapore Jan 12, 2026
★★★★★
"Impressive build quality. Especially the technical reliability is very stable during long-term operation."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

5 sourcing managers are analyzing this specification now. Last inquiry for Sensor Head / Tube from Germany (24m ago).

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Frequently Asked Questions

What materials are used in vacuum gauge sensor heads/tubes?

Our sensor heads/tubes are constructed from durable materials including stainless steel for corrosion resistance, glass for transparency and chemical inertness, and ceramic for high-temperature stability in demanding industrial environments.

How does a sensor head/tube measure vacuum pressure?

The sensor head/tube contains a sensing filament/element that directly interacts with the vacuum environment. As pressure changes, the filament's electrical properties alter, allowing precise measurement of vacuum levels in machinery and equipment applications.

What are the main components of a vacuum gauge sensor head/tube?

Key components include the electrical feedthrough for signal transmission, the sensing filament/element that detects pressure changes, and the tube body/housing that protects internal components while maintaining vacuum integrity in industrial settings.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

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