{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"E3T-SL12","brand":"Omron","brandSlug":"omron","productSlug":"E3T-SL12","canonicalUrl":"https://aoctrl.com/omron/E3T-SL12","factsUrl":"https://aoctrl.com/api/mcp/products/E3T-SL12","rawCanonicalId":null},"summary":{"shortDescription":"Omron E3T Series, Photoelectric Sensor, E3T-SL12, Rectangular, Diffuse, 12-24 VDC, NPN, Dark On, 15 mm max, IP67.","salesMarkdown":"## Miniature Diffuse Sensor – Dark On, NPN The Omron E3T-SL12 is a rectangular diffuse photoelectric sensor in the E3T series. It runs on 12-24 VDC, outputs an NPN signal, and switches Dark On—meaning the output is ON when the reflected light is absent (object detected). Sensing range is 5 mm to 15 mm at a 1 ms response time. IP67 and PBT body make it line-down tough for washdown or dusty spots. ## Swap Alert – Dark On vs Light On Siblings The E3T-SL12 is the only Dark On variant in the E3T diffuse series. The E3T-SL11 shares every other physical spec—same body, cable, IP67, 15 mm max—but switches Light On. If you're replacing an E3T-SL11 slot, dropping in an SL12 inverts the output logic without hardware change. No rewiring of the signal line, but the PLC or relay logic must accommodate a level reversal. The E3T-SL21 pushes max distance to 30 mm but is also Light On. The E3T-SL13 is PNP Light On. That means if your BOM called for PNP, the SL12's NPN won't pull your input high—check the card type. ## Packed In – Protection and Power The sensor carries output short-circuit protection, output reverse polarity protection, and power supply reverse polarity protection on board. That's three less external diodes and fuses to panel-build. Indicator light included, so you can walk the line and see the state without a scope. ## Mech & Mounting at a Glance 11 mm deep, 7 mm wide, 25 mm tall. Right-angle sensing face (emitter and receiver in the same head). Prewired 2 m bare-wire cable—strip and land. Minimum detectable object is 0.15 mm diameter, so it catches small targets on a feed rail. Temperature floor -13 °F, ceiling 131 °F. CE marked.","metaTitle":"Omron E3T-SL12 Photoelectric Sensor, NPN Dark On, 15mm Diffu","metaDescription":"Current-production diffuse photoelectric sensor, NPN output, Dark On switching. 12-24 VDC, 5-15 mm range, IP67, 2 m prewired. Active lifecycle—source against BOM now. RFQ via Indus","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Photoelectric Sensors"],"specifications":{"title":"E3T-SL12","Series":"E3T","Features":"Output Reverse Polarity Protection; Output Short-Cut Protection; Power Supply Reverse Polarity Protection","IP Rating":"IP67","Standards":"CE","Display Qty":"1","description":"Miniature Square Photoelectric Sensor","Product Type":"Photoelectric Sensor","Body Material":"PBT","Overall Depth":"11 mm","Overall Width":"7 mm","Response Time":"1 msec","Output Circuit":"NPN","Overall Height":"25 mm","Sensing Method":"Diffuse","Supply Voltage":"12-24V DC","lifecycle_stage":"current","Display Sell UOM":"EA","Sensor Body Style":"Rectangular","Minimum Object Size":"0.15mm Dia.","Output Circuit Type":"NPN","Sensor Cable Length":"2 m","Supply Voltage Type":"DC-Only","Emitted Sensor Light":"Red Light","Electrical Connection":"Bare Wire","Sensor Switching Mode":"Dark On","Load Current - Maximum":"50 mA","Sensor Face Orientation":"Right Angle","DC Supply Voltage Rating":"12-24V DC","Includes Indicator Lights":"Indicator Lights Included","Sensing Distance - Maximum":"15 mm","Sensing Distance - Minimum":"5 mm","Electrical Installation Type":"Prewired Cable","Operating Temperature - Maximum":"131 °F","Operating Temperature - Minimum":"-13 °F"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$64.01","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cb81064b2fc9ecd1c0d789dd39a71cd1.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional second source to E3T-SL12?","answer":"The E3T-SL11 is mechanically identical but switches Light On instead of Dark On. Only the output logic differs—same cable, body, sensing range, and protection features."},{"question":"Will E3T-SL12 drop into a panel specified around E3T-SL11 without rewiring?","answer":"The cables and pinout are identical, but the output is inverted. If your controller expects a Light On signal (output ON when target is present), a Dark On E3T-SL12 will output OFF. You can swap the sensor without rewiring, but you must invert the logic in your controller or relay wiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/omron/E3T-SL12","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-SL12 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}}