Measurement of Strain Using Strain Gauge Trainer

The Measurement of Strain Using Strain Gauge Trainer is a precision educational system designed to demonstrate the principles of strain measurement using electrical resistance strain gauges. It enables students to understand the relationship between applied mechanical load and the resulting strain in a cantilever beam while introducing the practical application of Wheatstone bridge circuits, strain gauge instrumentation, and electronic signal conditioning.

The trainer consists of a stainless steel cantilever beam instrumented with temperature-compensated foil strain gauges connected in a Wheatstone bridge configuration. Mechanical loading is applied through calibrated weights placed on a loading pan attached to the beam, allowing students to observe the corresponding strain values displayed on a digital indicator.

The integrated electronic instrumentation includes a regulated DC excitation source, precision signal conditioning circuitry, and a 3½-digit digital display that directly indicates the applied load and corresponding strain measurements. Multiple colour-coded test points are provided throughout the circuit, enabling students to monitor voltages and study signal flow during experimentation.

Designed for engineering colleges, universities, technical institutes, TVET centres, and industrial training laboratories, the trainer provides practical experience in experimental stress analysis, instrumentation engineering, mechanical measurements, and sensor technology.

Key Features

The trainer utilizes high-precision temperature-compensated foil strain gauges mounted on a stainless steel cantilever beam to ensure accurate and repeatable measurements. A Wheatstone bridge circuit with two active strain gauge arms provides excellent sensitivity and stability. The system incorporates electronic signal conditioning, a regulated DC excitation source, ten-turn zero adjustment, and a digital display for direct measurement. Colour-coded test points facilitate waveform observation and circuit analysis, making the trainer ideal for both practical experiments and classroom demonstrations.

Technical Specifications

• Experiment: Measurement of Strain Using Strain Gauges

• Measured Parameter: Strain Corresponding to Applied Load

• Measurement Method: Calibrated Weights and Electronic Instrumentation

• Transducer Type: Temperature Compensated Foil Strain Gauge

• Strain Gauge Material: Copper-Nickel (Cu-Ni) Foil

• Carrier Material: Polyamide

• Nominal Resistance: 350 Ω

• Gauge Length: 6 mm

• Gauge Width: 2.4 mm

• Gauge Base Dimensions: 12.5 × 4.3 mm

• Gauge Factor: Approximately 2.1

• Cantilever Material: Stainless Steel

• Bridge Configuration: Wheatstone Bridge with Two Active Strain Gauge Arms

• Maximum Load Capacity: 10 kg

• Excitation Source: Regulated DC Supply

• Zero Adjustment: Ten-Turn Precision Potentiometer

• Display: 3½-Digit Digital Display

• Test Points: Colour-Coded Circuit Test Points

• Power Indicator: Mains ON/OFF Indicator

Educational Experiments

The trainer enables students to study the operating principles of resistance strain gauges, Wheatstone bridge circuits, strain measurement techniques, cantilever beam deflection, load versus strain relationships, bridge balancing, transducer calibration, signal conditioning, electronic instrumentation, and experimental stress analysis. Students can also observe bridge voltages at various stages using the integrated test points while learning calibration and measurement procedures.

Applications

The Measurement of Strain Using Strain Gauge Trainer is widely used in Mechanical Engineering Laboratories, Civil Engineering Laboratories, Instrumentation Engineering Departments, Mechatronics Laboratories, Technical Training Institutes, Polytechnic Colleges, TVET Centres, Universities, Engineering Colleges, Industrial Training Centres, and Research & Development Laboratories. It is suitable for laboratory practicals, classroom demonstrations, instrumentation training, and experimental mechanics education.

Standard Accessories

The trainer is supplied complete with calibrated loading weights, loading pan, detailed instruction manual, and all necessary connecting accessories for immediate laboratory use.

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