Editorial Technical Reference

Torque Transducer

This page explains how Torque Transducer is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A precision measurement device that converts applied torque into an electrical signal for quantification and analysis.

Product Specifications

Technical details and manufacturing context for Torque Transducer

Definition
The Torque Transducer is a critical component within a Torque Verification Unit, responsible for accurately measuring rotational force (torque) applied to a system. It serves as the primary sensing element that detects torque values and transmits corresponding electrical signals to monitoring or control systems for verification, calibration, and quality assurance purposes. The transducer is designed for integration into machinery and equipment manufacturing processes where precise torque measurement is essential. It operates on the principle of strain gauge technology, where strain gauges are bonded to a torsion shaft or similar sensing element. When torque is applied, the shaft undergoes torsional deformation, causing changes in electrical resistance in the strain gauges. These resistance changes are converted into proportional electrical signals (typically voltage or current) through Wheatstone bridge circuits, which are then amplified and processed to provide precise torque measurements. The transducer is available in various configurations to suit different applications, with rated torque ranges from 0.5 to 1000 N·m, accuracy classes from 0.1 to 0.5% FS (per ISO 7500-1), and nonlinearity, hysteresis, and repeatability within specified limits. It features a rated output of 1–2 mV/V, excitation voltage of 5–12 V DC, and bridge resistance of 350–700 Ω. The operating temperature range is -10 to +60 °C, with temperature effects on zero and span within ±0.005 to ±0.02% FS/°C. Ingress protection ratings range from IP54 to IP67 (per IEC 60529), and the material is typically stainless steel (17-4PH) per ASTM A564. For accurate selection, users must verify model-specific values and standards with the legal manufacturer or supplier, as the listed parameters are reference ranges. The transducer is essential for ensuring torque accuracy in quality control, calibration, and process monitoring applications.
Working Principle
The transducer uses strain gauges bonded to a torsion shaft. When torque is applied, the shaft deforms torsionally, changing the electrical resistance of the strain gauges. These changes are converted into proportional electrical signals via a Wheatstone bridge circuit. The signal is then amplified and processed to provide a precise torque measurement. The output is typically a voltage or current signal proportional to the applied torque.
Common Materials
Stainless steel, Alloy steel, Strain gauge foil, Electrical insulation materials
Technical Parameters
ParameterTypical rangeNotes & selection driver
Rated Torque0.5–1000 N·mSelect based on maximum applied torque; overload may damage sensor.
Accuracy Class0.1–0.5 % FSHigher accuracy for precision testing; lower for general monitoring.ISO 7500-1
Nonlinearity±0.05–±0.2 % FSDeviation from ideal linear response; affects measurement fidelity.
Hysteresis±0.05–±0.1 % FSDifference in output for same torque during loading/unloading.
Repeatability±0.03–±0.1 % FSConsistency of output under repeated identical conditions.
Rated Output1–2 mV/VAnalog output at rated torque; typical for strain gauge transducers.
Excitation Voltage5–12 V DCRecommended supply voltage; deviation may affect output.
Bridge Resistance350–700 ΩInput impedance of the strain gauge bridge.
Insulation Resistance≥2000 At 50 V DC; ensures electrical safety and signal integrity.
Operating Temperature Range-10–+60 °CBeyond range may cause zero drift or damage.
Temperature Effect on Zero±0.005–±0.02 % FS/°CZero shift per degree Celsius; critical for varying environments.
Temperature Effect on Span±0.005–±0.02 % FS/°CSensitivity change per degree Celsius; affects accuracy.
Ingress ProtectionIP54–IP67Higher IP for dusty or wet environments.IEC 60529
MaterialStainless steel (17-4PH)Corrosion resistance and durability.ASTM A564

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
  • Torsion Shaft Part
    Primary sensing element that deforms under applied torque
    Material: Alloy steel
  • Strain Gauges Part
    Convert mechanical deformation into electrical resistance changes
    Material: Constantan or Karma alloy foil
  • Signal Conditioning Circuit
    Amplifies and processes electrical signals from strain gauges
    Material: Printed circuit board with electronic components
  • Housing Part
    Protects internal components from environmental factors
    Material: Stainless steel or aluminum
  • Electrical Connector Part
    Provides interface for power supply and signal output
    Material: Plastic with metal contacts

Applied To / Applications

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

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 100 bar
other spec: Torque range: 0.1 Nm to 20,000 Nm, Accuracy: ±0.1% to ±0.5% FS
temperature: -40°C to +85°C
Media Compatibility
✓ Lubricating oils ✓ Hydraulic fluids ✓ Clean dry air
Unsuitable: Corrosive chemicals or abrasive slurries
Sizing Data Required
  • Maximum torque requirement (Nm)
  • Shaft diameter and connection type
  • Required accuracy and response frequency

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Strain gauge degradation
Cause: Excessive mechanical overload beyond rated capacity, leading to permanent deformation or fracture of strain gauges, or thermal cycling causing fatigue and bond failure.
Signal drift or loss
Cause: Moisture ingress or contamination of internal electronics due to inadequate sealing, or electrical interference from nearby high-power equipment affecting signal integrity.
Maintenance Indicators
  • Erratic or unstable torque readings during operation, indicating potential internal damage or signal interference.
  • Audible clicking or grinding noises from the transducer housing during rotation, suggesting mechanical wear or misalignment.
Engineering Tips
  • Implement regular calibration checks using traceable standards to detect early signal drift and ensure measurement accuracy.
  • Maintain proper environmental controls, including sealing integrity checks and temperature/humidity monitoring, to protect internal components from contamination and thermal stress.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 6789:2017 (Screwdrivers and torque wrenches - Requirements and test methods) DIN 51309:2005 (Torque measuring devices - Calibration and testing) ASTM E74-18 (Standard Practice of Calibration of Force-Measuring Instruments for Verifying the Force Indication of Testing Machines)

Quoted from the published standard.

Manufacturing Precision
  • Torque accuracy: +/-0.5% of full scale
  • Non-linearity: +/-0.2% of full scale
Quality Inspection
  • Calibration verification against traceable torque standard
  • Hysteresis testing (forward/reverse torque cycles)

Manufacturers of Torque Transducer

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

Anhui Zhimin Electrical Technology Co., Ltd.
Anhui, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “dynamic torque transducer”
View source page ↗ zhiminsensor.com · checked 2026-09-06
TallMan Robotics
Dongguan, Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Torque Transducers”
View source page ↗ tallman-robotics.com · checked 2026-09-05

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

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Frequently Asked Questions

What is the typical rated torque range for this transducer?

The rated torque range is 0.5 to 1000 N·m, but the specific value must be selected based on the maximum applied torque in your application to avoid overload damage.

What accuracy class can be expected?

The accuracy class ranges from 0.1 to 0.5% FS, with higher accuracy suitable for precision testing and lower for general monitoring. The standard reference is ISO 7500-1.

What is the operating temperature range?

The operating temperature range is -10 to +60 °C. Beyond this range, zero drift or damage may occur. Temperature effects on zero and span are within ±0.005 to ±0.02% FS/°C.

What ingress protection ratings are available?

Ingress protection ratings range from IP54 to IP67 per IEC 60529. Higher IP ratings are suitable for dusty or wet environments. Verify the specific rating with the manufacturer.

Data Basis

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

Preliminary Technical Classification
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