Throughout all sectors of industry technical and production departments are investing in and seeking miniaturization of sensing devices. This is true of the medical profession where new and more intricate surgical procedures, treatment methods and diagnostics are seeking rapid. accurate and low cost sensing devices for both gases, dissolved compounds and reaction endpoints.. Extec has obtained an established reputation for innovation within the Thick Film Hybrid industry during the last 9 years, and have exploited this technology in establishment of an experirnental low power, low cost CO gas sensor. This is achieved by altering the materials content of a cofired suspended laminate within a small (less than 1/100 the size of a conventional detector strip) sensing element. It is the purpose of this proposed project to extend the application of thick film laminate sensors to the development of small, low cost, highly sensitive sensor devices with particular emphasis to the medical and process control industries.