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LATERAL EXTENSOMETER AZA1171
The AZA 1171 Lateral Extensometer is a precision mechanical instrument designed for accurate measurement of lateral (transverse) strain in concrete and other rigid materials during compressive testing. It is an essential accessory for civil engineering laboratories, research institutions, and quality control facilities engaged in the evaluation of concrete mechanical properties.
Specifically engineered for 150 mm diameter × 300 mm height concrete cylinders, the AZA 1171 enables precise monitoring of diameter expansion while the specimen is subjected to compressive loads. This lateral deformation data is critical for determining Poisson’s Ratio, modulus of elasticity, and understanding material failure behavior under stress.
Unlike axial extensometers, which measure vertical shortening, the AZA 1171 captures transverse expansion with high resolution. The device clamps externally onto the specimen without causing damage, ensuring non-destructive testing and repeatable measurements.
Description
Design & Construction
The extensometer consists of two movable frames pivoted at one end, allowing smooth and accurate tracking of lateral deformation. It is secured to the specimen using tightening screws, ensuring stable contact throughout the test.
A high-precision dial gauge (0.002 mm resolution, 5 mm travel) is mounted on the upper ring, with its probe resting against a hardened anvil. The zero reference can be accurately set using the anvil adjustment screw, allowing consistent baseline readings before load application.
All components are manufactured from corrosion-resistant materials, ensuring durability, dimensional stability, and long service life even under repeated testing cycles. The instrument is supplied in a wooden carrying case for safe storage and transport.
Why Use a Lateral Extensometer?
When concrete is compressed, it expands laterally. Measuring this deformation is essential for a complete understanding of material behavior.
Key Advantages:
-
Accurate determination of Poisson’s Ratio
-
High-resolution lateral strain measurement
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External mounting with no specimen alteration
-
Reliable performance during full compression cycles
-
Compatible with most compression and universal testing machines
Key Features & Benefits
High Precision Measurement
Dial gauge with 0.002 mm resolution ensures accurate strain detection.
Non-Destructive External Mounting
Clamps directly onto the specimen without embedded sensors or adhesives.
Robust Mechanical Design
Two-frame pivoted structure provides stable and repeatable readings.
Easy Zero Adjustment
Anvil screw allows precise zero setting before testing.
Wide Compatibility
Designed for use with standard compression and universal testing machines.
Supplied Ready for Use
Delivered with dial gauge and protective wooden carrying case.
Applications
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Determination of Poisson’s Ratio in concrete
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Elastic modulus evaluation
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Compression testing of concrete cylinders
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Civil engineering laboratory testing
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Research and academic material studies
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Quality control in construction materials testing
Specifications
| Parameter | Value |
|---|---|
| Model | AZA 1171 – Lateral Extensometer |
| Specimen Size | 150 mm dia × 300 mm height concrete cylinder |
| Dial Gauge Range | 0–5 mm |
| Dial Gauge Resolution | 0.002 mm |
| Measuring Type | Mechanical (Dial Gauge) |
| Mounting Method | Clamp-based with tightening screws |
| Frame Construction | Corrosion-resistant steel / alloy |
| Gauge Adjustment | Anvil screw zero setting |
| Compatibility | Compression & Universal Testing Machines |
| Supply | Supplied with wooden carrying case |
| Application Area | Concrete & rigid materials testing |
Frequently Asked Questions (FAQ)
Q1: What is a lateral extensometer used for?
It measures lateral deformation of concrete specimens during compressive loading.
Q2: Which specimen size is it designed for?
It is designed for 150 mm diameter × 300 mm height concrete cylinders.
Q3: Can it be used with any compression testing machine?
Yes, it is compatible with most standard compression and universal testing machines.
Q4: Is the measurement destructive?
No. The extensometer mounts externally and does not alter the specimen.
Q5: How accurate is the measurement?
The dial gauge provides 0.002 mm resolution, ensuring high accuracy and repeatability.
Additional information
| Gauge Length |
50 mm (standard), adjustable |
|---|---|
| Resolution |
0.01 mm |
| Operating Environment |
Lab and industrial setups |
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