Moisture probes for the construction industry

Radar moisture probes

For applications in the construction industry in sand, gravel and fresh concrete, moisture probes have to meet a number of different requirements. When manufacturing the various grades of concrete, it becomes more and more important to comply with the relevant standards.

The TDR measurement principle (time-domain reflectometry, in the German-speaking area also referred to as “cable radar”) has gained increasing acceptance in industry within the last 10 years as a new and precise measurement technique for demanding applications. The TDR technique determines the dielectric constant e via the period (time domain measurement) of an electromagnetic pulse and consequently the moisture content.

Why is it important to measure the moisture in sand, gravel, fresh concrete and other materials very precisely? If a concrete is produced with an aggregate quantity of 1850...

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