Developments towards a surface acoustic wave (SAW) sensor for detecting volatiles and its evaluation system

This work presents developments towards sensors with a flexible information management system. Substrates used for engineering passive and wireless surface acoustic wave (SAW) devices with interactive materials were tested for detection of temperature, humidity, carbon dioxide and other volatiles associated with food exports. Testing of new interactive materials was carried out using quartz crystal microbalance (QCM) methods. In preparation for testing new interactive materials, SAW devices with dimensions of 4×4 mm2 were fabricated on quartz and lithium niobate (LiNbO3) substrates. To evaluate the devices, a system was developed using a data acquisition tool and human‐machine interface developed with LABVIEW software to achieve inter‐operability between sensing devices and controlled micro‐environments.