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The Windsor Pin System for test and measurement of construction materials from Hylec Controls

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article image Testing Equipment - The Windsor Pin System
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The Windsor Pin is a test instrument for measuring the strength of new or existing construction materials in situ utilizing the established principle of resistance to penetration.

Testing and measurement - Windsor Pin System operating principle

A spring-loaded device drives a steel pin into the surface of concrete or mortar and the depth of penetration is measured. Since the depth of penetration is inversely proportional to compressive strength, this system provides a fast and efficient way of determining the in situ strength of material.

The spring is loaded by tightening the loading nut until the trigger mechanism latch closes to hold the spring in place. The stored potential energy is 91 lbs. in (108 NM). With the spring loaded, it is compressed to a distance of 0.8 inches. Thus, once the trigger is pulled there is enough force to test the compressive strength of concrete to a maximum of 5300 PSI (36.9 MPa).

The pin is made of special high-strength steel specifically for building material penetration and can be used up to seven times. It should be replaced if the length is reduced sufficiently for it to pass through a go/no-go gage.

These testing instruments conform to ASTM C-803. They are available from Hylec Controls .

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