Sokoll, ThorstenThorstenSokollJacob, ArneArneJacob2021-11-122021-11-122007-02-27Measurement Science and Technology 18 (4): 017 1088-1093 (2007-04-01)http://hdl.handle.net/11420/10904An in-situ measuring system for determining the moisture content in concrete buildings and masonry is presented. The system consists of a small and robust resonant microwave sensor and a compact low-cost network analyser. The sensitivity and frequency range requirements for the analyser are derived from the sensor design. A suitable realization of the analyser is discussed in detail. It is shown that a vectorial calibration routine diminishes measurement uncertainties caused by the used low-cost devices. Consequently, the moisture content can be determined within 0.6% instead of 3.0%. A test of the entire in-situ measurement system under realistic conditions is presented and discussed. © 2007 IOP Publishing Ltd.en0957-02332007410881093IOP Publ.CalibrationConcreteMeasurement systemMeasurement uncertaintyMicrowaveMoisture sensorMonitoringTechnikIngenieurwissenschaftenJournal Article10.1088/0957-0233/18/4/017Other