{"schemaVersion":1,"slug":"resistance-temperature-detector","name":"Resistance temperature detector","kind":"symbol","abbreviation":"RTD","aliases":["Pt100 temperature sensor"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An RTD is a temperature sensor whose resistance changes with temperature.","description":["An RTD is a temperature sensor whose resistance changes with temperature. Its schematic needs the selected sensor characteristic and two-, three- or four-wire measurement connection."],"readingNotes":["Count sensor conductors at the measuring input instead of inferring them from the sensor name.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State sensor characteristic","Show conductor count","Reference compatible temperature input"],"distinction":"An RTD is different from a discrete temperature switch or a thermocouple voltage source.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-temperature-input","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-resistance-temperature-detector","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/resistance-temperature-detector","illustration":{"url":"https://eloragrid.ai/library/illustrations/resistance-temperature-detector.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pub-symbol-temperature-input","title":"RTD and thermocouple temperature transducer inputs","publisher":"Phoenix Contact","url":"https://www.phoenixcontact.com/en-gb/products/temperature-measuring-transducer-macx-mcr-1ts-i-olp-1145192?type=pdf","type":"manufacturer","scope":"Public manufacturer explanation of the equipment function and selection context.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}]}