Thermopiles and Infrared detectors are the key non-contact sensors . The major applications of temperature sensors are in petrochemical industry , automotive industry , consumer electronics industry , metal industries , food and beverages industry , and healthcare . The largest application segment for temperature sensors is the petrochemical segment , together with related process applications . The electronics segment follows as the second largest application segment for temperature sensors .
IndustryARC expects the overall market size of the temperature sensors to be around $ 4.2 bn in 2013 .
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