{"schemaVersion":1,"slug":"vibration-sensor","name":"Vibration sensor","kind":"symbol","abbreviation":"VS","aliases":["vibration transmitter","accelerometer","machine vibration probe"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Sensor on a machine bearing that measures vibration and feeds a monitor or relay for alarm and trip.","description":["A vibration sensor is mounted on a machine bearing housing or near the shaft and produces a signal related to vibration, either as raw acceleration or as a processed velocity output in a 4-20 mA loop. It feeds condition monitoring systems and machine protection relays that alarm and trip large motors, generators and fans.","Accelerometers, velocity sensors and non-contact proximity probes measure different things and suit different machines. The symbol does not show which type is used, the measuring axis or the alarm levels, which are machine-specific and should be in the instrument schedule."],"readingNotes":["Identify sensor type and measuring axis.","Find the alarm and trip levels in the monitoring settings."],"drawingChecklist":["State sensor type and axis","Show loop or signal wiring","Reference alarm and trip levels"],"distinction":"A vibration sensor produces a measurement signal; a vibration switch only changes a contact at a set level.","facts":[{"label":"Output","value":"Raw signal or 4-20 mA processed value"},{"label":"Location","value":"Bearing housing or shaft"},{"label":"Preview","value":"Functional illustration of the device role; not a product footprint or certified standard graphic"}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Public AutoCAD Electrical instrumentation and sensor family."},{"sourceId":"expansion-20261027-sensing","relevance":"Public overview of electrical and physical sensing functions."}],"related":["39-mechanical-condition-monitor","temperature-measuring-transducer","ansi-tachometer"],"artwork":"s28-vibration-sensor","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","plainEnglish":{"title":"What does Vibration sensor mean?","introduction":"A vibration sensor is mounted on a machine bearing housing or near the shaft and produces a signal related to vibration, either as raw acceleration or as a processed velocity output in a 4-20 mA loop. It feeds condition monitoring systems and machine protection relays that alarm and trip large motors, generators and fans.","example":"Accelerometers, velocity sensors and non-contact proximity probes measure different things and suit different machines. The symbol does not show which type is used, the measuring axis or the alarm levels, which are machine-specific and should be in the instrument schedule.","drawings":"Identify sensor type and measuring axis. Find the alarm and trip levels in the monitoring settings. A vibration sensor produces a measurement signal; a vibration switch only changes a contact at a set level.","terms":[{"name":"Normally open / normally closed","meaning":"The contact state in the normal condition defined for the drawing."},{"name":"Coil","meaning":"A wound conductor that can produce a magnetic field when energised."},{"name":"Signal","meaning":"Electrical information passed between devices, rather than necessarily the main power supply."}],"diagram":"flow","steps":["Identify the device and form","Read the connections and state","Check the equipment reference"],"caption":"A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.","sources":[{"label":"AutoCAD Electrical: Instrumentation and sensors","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-773A36C3-44C6-43EB-9BD0-E0297816B9B2.htm"},{"label":"Electrical and physical sensing functions","url":"https://www.ti.com/technologies/sensing.html"}],"detail":"Sensor on a machine bearing that measures vibration and feeds a monitor or relay for alarm and trip. A vibration sensor produces a measurement signal; a vibration switch only changes a contact at a set level.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/vibration-sensor","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/vibration-sensor.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-instrumentation","title":"AutoCAD Electrical: Instrumentation and sensors","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-773A36C3-44C6-43EB-9BD0-E0297816B9B2.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public AutoCAD Electrical instrumentation and sensor family."},{"id":"expansion-20261027-sensing","title":"Electrical and physical sensing functions","publisher":"Texas Instruments","url":"https://www.ti.com/technologies/sensing.html","type":"manufacturer","scope":"Public functional documentation. Original explanatory text and educational block artwork; no publisher graphics or files reproduced.","checkedOn":"2026-10-27","reuse":"link-only","relevance":"Public overview of electrical and physical sensing functions."}]}