Description

Length Comparator – For Measuring Length Change of Cement and Concrete Specimens

The Length Comparator is a precision instrument used to measure the length change or drying shrinkage of cement, mortar, and concrete specimens. It ensures accurate and consistent readings when testing the dimensional stability of materials under various curing and drying conditions. This apparatus is essential in cement and concrete testing laboratories for quality control and research purposes.

The Length Comparator consists of a sturdy frame with a movable measuring probe, a high-precision dial gauge, and a reference anvil for accurate measurements. The dial gauge typically has a 0.001 mm least count, providing highly precise readings. The instrument is designed to work with standard shrinkage bar moulds and complies with IS: 4031 (Part 10), ASTM C490, and BS standards.

Key Features:

• High-precision dial gauge (0.001 mm accuracy) for accurate readings

• Sturdy and corrosion-resistant frame for long service life

• Adjustable measuring probe and reference anvil for different specimen sizes

• Compatible with standard shrinkage bar moulds

• Easy to operate, calibrate, and maintain

• Conforms to IS: 4031 (Part 10), ASTM C490, and BS 1881 standards

Applications:

• Used to measure length change and drying shrinkage of cement, mortar, and concrete

• Ideal for cement testing laboratories, construction quality control, and research institutions

• Suitable for use with shrinkage bar moulds and cement expansion tests