Development of Love Wave devices based on delay line configuration for the high detection and monitoring of carbon monoxide

Meddy Vanotti , Virginie Blondeau-Patissier (1) , Sylvain Ballandras

1 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)

Carbon Monoxide is produced by incomplete combustion. Its high toxicity and the lack of detection capability of human olfaction render CO a dangerous compound which is known as the “silent killer”. Therefore, there is the necessity to develop a device to detect the presence of low CO concentrations in indoor air. We here report on results obtained for CO detection by using SAW devices functionalized with new materials such as cobalt corroles. During the tests, CO sensors have been exposed to changes of several experimental parameters (temperature, flow, pressure, presence of analyte gas). In order to exclusively extract the information concerning CO adsorption, we used a specific differential setup comprising two SAW devices A minimum of 450ppb of CO concentration have been monitored and the experimentations have shown a great repeatability and stability of measurements. The test bench permits the regeneration of the trapping sites of CO allowing the reusability of the devices. These good results pave the way to the detection of other gas and even particles.

Mots clés: gas sensor; differential mesaure; CO; Love wave

Domaines: Acoustique [physics.class-ph]

Meddy Vanotti, Virginie Blondeau-Patissier, Sylvain Ballandras. Development of Love Wave devices based on delay line configuration for the high detection and monitoring of carbon monoxide. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811089⟩