SRD's unique strength is the ability to combine multiple sensor technologies and sophisticated signal processing algorithms into intelligent detection systems.
SMO sensors are chemiresistive sensors designed to react with one class of gases. In the presence of any gas within the specified class, the SMO undergoes reduction and oxidation. SMO sensors exchange electrons with each gas within the class at a characteristic rate. The exchange of electrons changes the sensor’s resistance, yielding an identifiable signal.
SRD's proprietary methods for developing has demonstrated that we can improve SMO selectivity with specific combinations of metal oxide species and catalysts, and by optimizing each material’s operating temperature profile.
P-SAW use mass loading to detect a gas’s presence. Sensors consist of two miniature transducers coated with an ultra-thin polymer film. One transistor generates an acoustic wave at a specified frequency. The second transducer receives the wave reads that frequency, and converts it to an electrical signal. Between the transducers is a polymer coating, chosen to attract and chemically bind with a specific gas. When gas molecules bind with the polymer, they increase the coating's mass and alter the wave frequency.
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