Gauge Movement for Temperature Gauges

Product Specifications

Technical details and manufacturing context for Gauge Movement

Definition

The gauge movement is the core mechanical assembly within a temperature gauge that translates the thermal expansion of a sensing element (such as a bimetallic strip or filled bulb) into the rotational motion of the pointer, allowing for visual temperature reading on the dial. This component is essential for the accurate and reliable indication of temperature in various industrial applications. The movement typically consists of a linkage system, gears, and a shaft that work together to amplify and convert the small mechanical displacement of the sensing element into a precise rotation of the pointer. The materials commonly used in its construction include brass, steel, and phosphor bronze, which provide the necessary strength, corrosion resistance, and low friction for smooth operation. The performance of the gauge movement is characterized by several key parameters, including operating temperature range, accuracy class, torque, shaft diameter, center distance, material, weight, humidity range, and vibration resistance. These parameters must be carefully matched to the specific application requirements to ensure reliable and accurate temperature measurement. For instance, the operating temperature range of -40 to 85 °C indicates the limits within which the movement can function without mechanical failure. The accuracy class, ranging from 1.0 to 2.5 percent, defines the allowable error in the reading, with higher classes indicating lower tolerance. The torque, typically between 0.05 and 0.2 N·m, must be sufficient to drive the pointer and any optional contacts. The shaft diameter and center distance are critical for compatibility with the gauge case and pointer hub. The material specification, such as brass alloy C3604, ensures corrosion resistance and machinability. The weight, ranging from 10 to 50 grams, affects shipping costs and handling. The humidity range of 0 to 95 percent non-condensing ensures that the movement operates without corrosion. Vibration resistance, tested according to IEC 60068-2-6, ensures stable operation in industrial environments. When selecting a gauge movement, it is essential to verify these parameters with the manufacturer or supplier to ensure they meet the specific requirements of the application. Additionally, compliance with relevant standards, such as EN 13190 for accuracy class, should be confirmed. The gauge movement is a critical component that directly impacts the performance and reliability of temperature gauges, making it a key consideration in the design and maintenance of industrial temperature measurement systems.

Working Principle

The working principle of the gauge movement is based on the thermal expansion of a sensing element, such as a bimetallic coil. When temperature changes, the sensing element expands or contracts, creating a mechanical displacement. This displacement is transferred through a linkage system within the movement, which amplifies and converts it into the precise rotational movement of the pointer shaft. The pointer then aligns with the corresponding temperature value on the calibrated dial. The linkage system typically includes gears and levers that ensure smooth and accurate transmission of motion. The materials used, such as brass and steel, provide the necessary strength and low friction for reliable operation. The movement is designed to operate within a specified temperature range and to withstand vibration and humidity conditions typical of industrial environments.

Common Materials

Brass, Steel, Phosphor Bronze

Technical Parameters

Parameter	Typical range	Notes & selection driver
Operating Temperature Range	-40–85 °C	Beyond this range, thermal expansion may cause mechanical failure.
Accuracy Class	1.0–2.5 %	Higher class indicates lower tolerance.EN 13190
Torque	0.05–0.2 N·m	Sufficient to drive pointer and optional contacts.
Shaft Diameter	2–4 mm	Must match the gauge case and pointer hub.
Center Distance	28–100 mm	Determines the gauge size and mounting compatibility.
Material	C3604	Brass alloy for corrosion resistance and machinability.JIS H3250
Weight	10–50 g	Varies with size and material; affects shipping cost.
Humidity Range	0–95 % RH	Non-condensing; higher humidity may cause corrosion.
Vibration Resistance	10–500 Hz	Sinusoidal vibration; ensures stable operation in industrial environments.IEC 60068-2-6

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

Bimetallic Coil Part
Sensing element that expands/contracts with temperature changes.

Material: Bimetallic Strip (e.g., Brass-Invar)
Movement Plate Part
Base structure supporting all internal components.

Material: Brass or Steel
Pointer Shaft Part
Axle on which the pointer is mounted, driven by the movement.

Material: Steel
Hairspring Part
Provides restoring torque to the pointer, ensuring zero return and stability.

Material: Phosphor Bronze
Gears
Part of the linkage that amplifies the sensing element displacement into pointer rotation.
Levers
Part of the linkage that transmits the thermal displacement to the pointer shaft.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Gauge Movement.

Applied To / Applications

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

Temperature Gauge

View system integration details

Manufacturers of Gauge Movement

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

NINGBO BEILUN GC-BOB INSTRUMENT CO.,LTD.

Ningbo, Zhejiang, CN

Also makes: Pressure Gauge/Sensor, Pressure Gauge, Flow Meter and 8 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Pressure gauge movement”
View source page ↗ gauge-china.com · checked 2026-08-30

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 16 September 2026

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Frequently Asked Questions

What is a gauge movement?

A gauge movement is the internal mechanical assembly of a temperature gauge that converts the thermal expansion of a sensing element into the rotational motion of the pointer, enabling temperature reading on the dial.

What materials are commonly used in gauge movements?

Common materials include brass, steel, and phosphor bronze. These materials provide strength, corrosion resistance, and low friction for reliable operation.

What parameters should be considered when selecting a gauge movement?

Key parameters include operating temperature range, accuracy class, torque, shaft diameter, center distance, material, weight, humidity range, and vibration resistance. These must match the application requirements.

How do I verify the accuracy class of a gauge movement?

The accuracy class is specified as a percentage (e.g., 1.0–2.5) and should be verified with the manufacturer or supplier. Compliance with standards such as EN 13190 should be confirmed.

Data Basis

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

Preliminary Technical Classification

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pressure:	0 to 10 bar (gauge pressure)
other spec:	Vibration tolerance: ≤5g RMS, Response time: ≤2 seconds
temperature:	-40°C to 150°C (operating range)

Gauge Movement

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards