CT-CAD

The CT-CAD technology incorporates surface acoustic wave (SAW) sensors for the detection and identification of chemical vapors. These vapors can consist of toxic industrial pollutants or chemical weapons agents.  Configurations of this technology include its incorporation into handheld devices and UAV applications.

The principle of operation of the device is as follows.  The sensing probe consists of a piezoelectric substrate that is coated with a coating specific to the target detection chemicals. The target chemicals are sorbed to the coating, thus changing the mass.  This change of mass causes a change in the resonant frequency of the probe.  The frequency change can be measured with appropriate electronics.

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