Vacuum Gauge Sensor Head/Transducer – Component for Pressure Measurement

Product Specifications

Technical details and manufacturing context for Sensor Head/Transducer

Definition

The sensor head/transducer is a critical component of vacuum gauges, serving as the primary interface between the vacuum system and the measurement electronics. It directly interacts with the vacuum environment to detect pressure changes and transforms physical pressure variations into corresponding electrical signals for processing and display. This component is essential for accurate pressure measurement in various industrial applications, including semiconductor manufacturing, thin-film deposition, and vacuum furnaces.

The sensor head operates based on different physical principles depending on the vacuum gauge type. For Pirani gauges, it uses thermal conductivity; for ionization gauges, it relies on ionization; and for capacitance manometers, it employs capacitance changes. The transduction mechanism converts the detected pressure into a proportional electrical signal, typically a 4–20 mA output, which is then transmitted to a control system or display.

Key parameters for selection include measuring range (0.1–1000 mbar), accuracy (±0.25% of reading), output signal (4–20 mA), supply voltage (9–36 V DC), operating temperature (-40–85 °C), process connection (1/4–1/2 inch NPT), ingress protection (IP65–IP67 per IEC 60529), sensor material (316L stainless steel per ASTM A240), and weight (150–300 g). These values are typical reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier.

The sensor head is constructed from materials such as stainless steel, ceramic, tungsten filament, and glass, ensuring durability and corrosion resistance in harsh environments. It is designed for two-wire loop-powered operation and includes reverse polarity protection. The process connection threads are available in various sizes, and other thread types may be offered.

For proper integration, users must confirm the compatibility of the sensor head with their vacuum system, including the process connection, electrical interface, and environmental conditions. Regular maintenance is required to ensure accurate readings, and any deviation in output or physical damage may indicate the need for recalibration or replacement. The sensor head is a component, not a standalone instrument, and must be used with compatible vacuum gauge electronics.

Working Principle

The sensor head operates based on the vacuum gauge type. In Pirani gauges, a heated filament's thermal conductivity changes with pressure, altering its temperature and resistance, which is converted to an electrical signal. In ionization gauges, gas molecules are ionized by electrons, and the resulting ion current is proportional to pressure. In capacitance manometers, a diaphragm deflects with pressure, changing capacitance. These changes are transduced into a proportional electrical signal, typically 4–20 mA, for processing.

Common Materials

Stainless steel, Ceramic, Tungsten filament, Glass

Technical Parameters

Parameter	Typical range	Notes & selection driver
Measuring Range	0.1–1000 mbar	Typical range for vacuum gauges
Accuracy	±0.25 % of reading	Includes linearity and hysteresis
Output Signal	4–20 mA	Two-wire loop powered
Supply Voltage	9–36 V DC	Reverse polarity protected
Operating Temperature	-40–85 °C	Compensated range -20–80 °C
Process Connection	1/4–1/2 inch NPT	Other threads available
Ingress Protection	IP65–IP67	For harsh environmentsIEC 60529
Sensor Material	316L SS	Corrosion resistantASTM A240
Weight	150–300 g	Depends on connection type

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Sensing Element Part
Directly interacts with vacuum environment to detect pressure changes

Material: Tungsten/Platinum/Iridium
Housing Part
Protects internal components and provides vacuum seal

Material: Stainless steel/Ceramic
Electrical Connector Part
Transmits electrical signals to measurement electronics

Material: Copper/Gold-plated contacts
Mounting Flange Part
Secures the sensor head to the vacuum chamber

Material: Stainless steel
Diaphragm Optional
The deflecting membrane on capacitance-manometer heads; its movement changes the capacitance.

Applied To / Applications

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

Vacuum Gauge

View system integration details

Manufacturers of Sensor Head/Transducer

Manufacturer profiles associated with Sensor Head/Transducer.

Sourcing Sensor Head/Transducer from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What is the typical measuring range of this sensor head?

The typical measuring range is 0.1–1000 mbar, but this is a reference range. Confirm the exact range for your specific model with the manufacturer.

What output signal does the sensor head provide?

It provides a 4–20 mA two-wire loop-powered output signal. Verify the output type and compatibility with your control system.

What materials are used in the sensor head?

Materials include stainless steel, ceramic, tungsten filament, and glass. The sensor material is typically 316L stainless steel, but confirm for your application.

What ingress protection rating does it have?

The ingress protection is IP65–IP67 per IEC 60529, suitable for harsh environments. Verify the rating for your specific model.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Buyer enquiry

Request manufacturing insight for Sensor Head/Transducer

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes: Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here: We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman: CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim: A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

pressure:	1e-9 Torr to 1000 Torr (typical vacuum range)
other spec:	Response time: <100 ms, Accuracy: ±0.5% of reading, Power supply: 12-24 VDC
temperature:	-20°C to 80°C (operating), -40°C to 100°C (storage)

Sensor Head/Transducer

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards