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A ther­mal sen­sor is a tech­ni­cal mea­sur­ing de­vice for de­tect­ing tem­per­a­tures. There are non-con­tact tem­per­a­ture sen­sors and tem­per­a­ture sen­sors that touch the ob­ject to be mea­sured. Con­tact­ing sen­sors in­clude ther­mo­cou­ples and ther­mis­tors. Non-con­tact ther­mal sen­sors mea­sure ther­mal ra­di­a­tion from a heat source. Tem­per­a­ture sen­sors are used on a large scale to­day and are ba­sic com­po­nents of many in­dus­tri­al and tech­ni­cal process­es — in plas­tics tech­nol­o­gy, food tech­nol­o­gy, med­ical tech­nol­o­gy, chem­i­cal tech­nol­o­gy and many oth­er ar­eas. Tem­per­a­ture sen­sors en­sure that process­es run and run safe­ly in de­fined tem­per­a­ture ranges and that spec­i­fied ther­mal re­quire­ments are met when han­dling high temperatures.

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