The Benefits of a Digital Moisture Measurement Technique

The benefits of accurate moisture management are now widely accepted to clearly outweigh the investment and onward cost for concrete producers. Product yields may be maximised, materials efficiently utilised, energy consumption reduced and a quality finished product ensured.

There are various methods of using microwaves to measure moisture.  The most common method used in the concrete industry is the resonant cavity technique.  In the past, an analogue microwave sensor would measure moisture through a combination of frequency shift (the left to right movement of the response) and amplitude attenuation (the change in the height of the response) of the resonator, see Fig. 1. This combination was measured as a single analogue response and therefore frequency shift and attenuation could not be separated. Hydronix went on to break new ground in the 1980’s with the...

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