Large Speedy Ashworth
Moisture Meter

Knowledge of the moisture content of soils and construction materials is of great importance to engineers involved with the construction of roads, bridges and other civil structures. Throughout the world, the Large Speedy moisture tester is used on construction sites to establish the percent moisture content (%MC) of these materials before the actual construction work commences.

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The Speedy moisture tester is a portable-sampling instrument used to determine the moisture content of a broad range of materials. It comprises a hand held vessel incorporating a pressure gauge and a precision balance, mounted in an integral carry case.

This classically simple product gives reliable and accurate results in very demanding environments. A small sample of the material to be tested is weighed on the balance and then placed in the vessel. A measure of reagent - calcium carbide - is then added and the vessel sealed. The reagent reacts with the free moisture in the sample to produce acetylene gas, resulting in an increase in pressure within the vessel. The % moisture content of the sample is then read directly from the calibrated pressure gauge.