Extensometer for UTM Machine

Shanta Engineering is one of the leading Manufacturer and Exporter of a wide range of Testing Instruments and Equipments that are used to test rubber, plastic, cables and allied materials.

• Laboratory Testing Equipment and accessories
• Cable Testing Instruments
• Testing Machines ( UTM, Impact Tester, Melt Flow Tester etc)
• Machines for agricultural application.
• Bespoke customizations to satisfy special requirements of our clients

Our range of products are manufactured as per different standards ISO, ASTM, IS, UL and as per customer requirements.

We Export all types of Laboratory Testing Equipments Globally in Middle East and African countries.

Middle East countries - Bahrain, Cyprus, Egypt, Iran, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Palestine, Qatar, Saudi Arabia, Syria, Turkey, the United Arab Emirates, and Yemen.

African countries - Nigeria, South Africa, Kenya, Uganda, Ghana, Algeria, Egypt, Morocco, Togo, Libya, Zimbabwe, Sudan, Ethiopia, Mauritius

Extensometer for UTM Machine:

An Extensometer used with a UTM (Universal Testing Machine) in a laboratory is a device that measures the change in length (strain) of a material specimen when it is subjected to tension or compression. An Extensometer is an instrument that accurately measures the small extensions (elongation) or contractions that occur in a specimen during a tensile test (or sometimes compressive test).

Brand	Shanta Engineering
Finishing	Powder Coated
Gauge Length Calculation	Automatic
Load accuracy	+1% or -1%
Material	MS, SS
Type	Extensometer

Features of Extensometer for UTM Machine:

• Extensometer for UTM Machine can measure small to large deformations (usually from ±1 mm up to ±100 mm or more, depending on model). Gauge lengths vary (e.g., 10 mm, 25 mm, 50 mm, 100 mm). This ensures more accurate stress-strain curves, which are essential for determining material properties like Young’s modulus and yield strength.
• Accuracy & Resolution gives High-precision measurement, often ±0.5% or better. Resolution as fine as 0.001 mm in digital extensometers.
• Contact type (mechanical or clip-on) attached directly to the specimen. Non-contact type (video or laser extensometers) use optical sensors for delicate or high-temperature tests.
• Extensometer for UTM Machine is designed to integrate with UTM software and control systems, automatically recording strain vs. load data. It is constructed from lightweight, rigid materials like aluminum or stainless steel. Resistant to corrosion, temperature fluctuations, and vibration.
• The machine is Calibrated according to ISO 9513 or ASTM E83 standards for precision measurement. Some models are temperature-compensated or waterproof for testing under special conditions (e.g., environmental chambers, high-temperature furnaces).
• Quick clamping and release mechanism. Designed to minimize influence on the test specimen.

Advantages of Extensometer for UTM Machine:

Extensometer for UTM Machine reduces human error. Manual measurement using scale or displacement readings can introduce errors. Extensometers automatically and continuously record strain, minimizing human error.

Extensometers provide live strain readings during the test. This allows for real-time plotting of load vs. strain graphs on the UTM software. For accurate calculation of Elastic Modulus (E), strain must be measured precisely in the elastic region which an extensometer does better than the UTM’s crosshead movement.

The UTM’s moving parts can slightly deform under load. The extensometer measures the actual specimen elongation, not the machine movement improving accuracy. Automatic measurement and recording save testing time compared to manual measurements.

Extensometers provide consistent and repeatable strain readings, improving the reliability of multiple tests on similar specimens.

Different Materials can be used for metals, polymers, composites, ceramics, etc. Different types (clip-on, non-contact, laser, video extensometers) suit different applications. Many international testing standards (ASTM, ISO, IS) require extensometers for tests like Tensile test (ASTM E8/E8M), Compression test, Modulus of elasticity test.

Working of Extensometer for UTM Machine:

• Preparation - Clean the specimen (metal rod, polymer strip, etc.). Measure and note the original gauge length (L₀) — usually marked on the specimen using a marker or punch.
• Mounting the Specimen - Place the specimen firmly between the grips of the UTM. Ensure it is properly aligned (no bending or offset).
• Attaching the Extensometer - Attach the extensometer across the gauge length using knife edges, clips, or a clamp mechanism. The extensometer arms or sensors grip two points on the specimen at a known distance apart.
• Calibration / Zero Setting - Set the extensometer reading to zero (or initial reference reading). This ensures that all measured changes are relative to the starting length.
• Running the Test - Start the UTM tensile or compression test. As the load increases, the specimen stretches or compresses, and the extensometer detects the change in length. The signal is converted to an electrical output (in electronic extensometers) or a mechanical dial movement (in manual ones).
• Data Recording - The UTM records: Load (Force) Extension / Strain (from extensometer) A stress-strain curve is plotted automatically on a computer or manually using recorded data.
• Removal - Once the elastic limit is reached (before fracture), the extensometer is safely removed (to avoid damage). The test continues if needed until specimen breaks.
• Results & Calculations - From the recorded data, you can calculate: Stress = Load / Original Cross-sectional Area Strain = Change in Length / Original Length Elastic Modulus (E) = Stress / Strain (within elastic range)

Types of Extensometer for UTM Machine:

• Mechanical Extensometer – simple dial or lever type
• Electrical Resistance (Strain Gauge) Extensometer – converts strain to electrical signal
• Clip-on Extensometer – portable, spring-loaded clips
• Laser / Optical Extensometer – non-contact, very accurate

Extensometers in UTM (Universal Testing Machine) application Industries:

Extensometers are precision instruments used with Universal Testing Machines (UTMs) to measure the strain (change in length) of a specimen under tension, compression, or bending. They ensure accurate stress–strain data and material property determination.

• Metallurgical & Steel Industry
• Automotive Industry
• Aerospace Industry
• Construction & Civil Engineering
• Plastic & Polymer Industry
• Rubber Industry
• Medical Device Industry
• Wire & Cable Manufacturing