Length Comparator with Digital Dial Indicator

Length Comparator with Digital Dial Indicator

Length Comparator for measuring length changes in 10in (254mm) cement, mortar and concrete specimens. Includes Invar Reference Bar for zeroing dial or digital indicator. Digital length comparator for measuring changes in hardened cement paste, mortar and concrete specimens. Stationary and moving anvils fit Gauge Studs cast into test specimens. Models available with dial or digital indicator mounted on a vertical support stand attached to a triangular base with adjustable terminal and collar.

Test specimens up to 4x4x10in (102x102x254mm) cross-section, but 1x1x10in (25x25x254mm) prisms are standard.

V015.HM-250D with Digital Indicator is powered by two standard replaceable lithium batteries or AC adapter, both included. LCD digital display has auto On/Off and can switch between inch and mm. Internal memory stores user settings. Range is 0.6in (15mm).

Gage Studs for Mortar Bars are required for use with cement prism molds.

Features of Length Comparator:

• Digital or Dial Indicator

• Measures changes in 10in mortar bar specimens

• Meets ASTM and AASHTO specs

• Upright support and base

Length Comparator Includes:

• Length Comparator with Digital or Dial Indicator

• Invar Reference Bar

• Stationary and Movable Anvils

• Support Stand and Base

• 2 lithium batteries

• Adapter cord (HM-250D Digital Indicator model)

• 11 x 11.5 x 17in (279 x 292 x 432mm), WxDxH

Length Comparator Meets Test Methods:

ASTM C227 , ASTM C1260 , ASTM C1012/1012M , ASTM C151/151M , ASTM C157/157M , ASTM C490/490M , AASHTO R 70M/R 70 , AASHTO T 107M/T 107

A Length Comparator is a precision instrument used to measure length changes of hardened cement paste, mortar and concrete prismatic specimens. It’s a must have in the construction and materials testing industry, allowing users to measure dimensional changes of various materials under different conditions. The Length Comparator meets industry standards, ASTM and AASHTO specs, for accurate and reliable measurements. For professionals working with concrete prismatic specimens, hardened cement paste mortar and other paste mortar and concrete materials, this is a critical tool to get length changes and stability data.

Key Components and Features of the of Length Comparator

The Length Comparator has several key components that work together to measure. These are:

• Stationary and Movable Anvils: Fit Gauge Studs cast into test specimens, these anvils ensure secure and accurate positioning.

• Invar Reference Bar: For zeroing dial or digital indicator, this bar is critical for measurement accuracy.

• Upright Support: Attached to a solid triangular base, this support is stable and consistent.

• Digital Indicator or Dial Indicator: Measure length, digital has auto On/Off and unit conversion.

• Anvil Assembly: This can accommodate test specimens up to 4” x 4” (102 x 102mm) cross-section, so versatile for various testing needs.

The Length Comparator measures length changes of hardened cement paste, mortar and concrete prismatic specimens, so a must have for testing and quality control in the construction industry.

Measurement Procedure with the of Length Comparator

The measurement process with a Length Comparator involves:

1. Preparing the Test Specimen: The test specimen is prepared by casting gauge studs into the ends of the specimen, so it’s ready to measure.

2. Setting up the Length Comparator: Attach test specimen to stationary and movable anvils, so it fits securely.

3. Zeroing the Indicator: Zero the digital or dial indicator with the Invar reference bar, so you have a baseline for measurement.

4. Measure Length Changes: The Length Comparator measures the length changes of the test specimen, so you get accurate readings.

5. Record Data: Record and analyze the measurement data to get dimensional changes of the test specimen, so you get material performance data.

Applications and Advantages of of Length Comparator

The Length Comparator is used in the construction industry for:

• Testing and Quality Control: To check the quality and stability of cement paste, mortar and concrete prismatic specimens.

• Measure Length Changes: Measures length changes of hardened cement paste, mortar and concrete specimens under different conditions.

• Dimensional Evaluation: To evaluate dimensional changes of various materials, so they meet industry standards.

• Compliance with Standards: To ensure materials meet ASTM and AASHTO specs, so you can have confidence in their performance.

You get:

• Accurate and Precise Measurements: For quality control and testing.

• More Efficient and Productive: Simplifies the measurement process, saves time and labour.

• Better Quality Control: Allows you to monitor and maintain material quality.

• Compliant with Industry Standards: Meets ASTM and AASHTO specs, so materials are up to standard.

Advantages and Features of Digital Indicator Length Comparator

High Accuracy and Precision: Measures length.

• Digital or Dial Indicator: Options for precise length measurements, digital model has extra features.

• Solid Upright Support: Attached to a triangular base so it’s stable during measurement.

• Various Specimens: Can accommodate test specimens up to 4” x 4” (102 x 102mm) cross-section, so versatile for different testing needs.

• Battery Operated: Convenient and portable, digital model is battery powered or can be powered by an AC adapter.

• Compliant with Standards: Meets various industry standards, ASTM and AASHTO specs, so you can have confidence in performance.

Overall, the digital indicator Length Comparator is a reliable and accurate measurement tool that is essential for testing and quality control in the construction industry.