{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"E3T-ST12 5M","brand":"Omron","brandSlug":"omron","productSlug":"E3T-ST12-5M","canonicalUrl":"https://aoctrl.com/omron/E3T-ST12-5M","factsUrl":"https://aoctrl.com/api/mcp/products/E3T-ST12%205M","rawCanonicalId":null},"summary":{"shortDescription":"Omron E3T-ST12 5M, miniature through-beam photoelectric sensor, NPN dark-ON output, pre-wired 5m cable, 1m sensing range.","salesMarkdown":"The Omron E3T-ST12 5M is a subminiature through-beam photoelectric sensor from the E3T series with a built-in amplifier. It runs on 12 to 24 VDC and delivers an NPN output configured for dark-ON operation. The fixed sensing distance is 1 meter, and the pre-wired cable extends 5 meters. ## How it sits relative to the E3T-ST14 The E3T-ST14 is the closest functional sibling—same through-beam method, same 1 m sensing distance, same dark-ON logic. The critical difference: the ST12 is NPN, the ST14 is PNP. Cable length also differs—the ST14 comes with a 2 m cable. If your panel is wired for NPN, the ST12 fits. Moving to the ST14 means swapping output polarity and possibly extending the cable. ## Mounting notes Rectangular compact body in plastic. Through-beam alignment requires a clear line of sight between emitter and receiver. The 5 m cable gives flexibility for remote mounting; strip length and wire color follow standard Omron color code (brown +V, blue 0V, black output).","metaTitle":"Omron E3T-ST12 5M Miniature Photoelectric Sensor, NPN, Dark-","metaDescription":"Omron E3T-ST12 5M active production miniature through-beam photoelectric sensor. NPN dark-ON output, 1m sensing distance, 5m pre-wired cable. Quote to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Photoelectric Sensors"],"specifications":{"Type":"Miniature","title":"E3T-ST12 5M","Output":"NPN","Body Type":"Rectangular - Compact","Operation":"Dark-ON (D-ON)","Connection":"Pre-wired","description":"E3T Ultra Compact Photoelectric Sensor|Subminiature sensors with built-in amplifiers","Cable Length":"5 m","Light Source":"Red LED","Sensing Method":"Through-beam","Supply Voltage":"12 to 24 VDC","lifecycle_stage":"current","Housing Material":"Plastic","Product Life Cycle":"Active","Max Sensing Direction":"1 m, fixed"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1c54940d8ae24f22acf944f1516e53bd.pdf","sourceUrl":"https://automation.omron.com/en/us/products/family/E3T"},"ai":{"faq":[{"question":"Will E3T-ST12 5M drop into a panel specified around E3T-ST14 without rewiring?","answer":"No, because the output types differ (NPN vs. PNP). The wiring must be changed to match the output polarity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/omron/E3T-ST12-5M","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/omron/E3T-ST12-5M when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}