{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"E3S-AT21-D","brand":"Omron","brandSlug":"omron","productSlug":"E3S-AT21-D","canonicalUrl":"https://aoctrl.com/omron/E3S-AT21-D","factsUrl":"https://aoctrl.com/api/mcp/products/E3S-AT21-D","rawCanonicalId":null},"summary":{"shortDescription":"OMRON E3S-AT21-D Through Beam Photoelectric Sensor – Receiver, 7 m operating range, NPN selectable Dark-ON/Light-ON, 10-30 V DC, cable connector.","salesMarkdown":"OMRON E3S-AT21-D is a through-beam photoelectric sensor receiver with a 7 m operating range. It outputs an NPN signal with selectable Dark-ON or Light-ON logic, powered by 10-30 V DC. The cable connector and rectangular housing make it a direct fit for existing through-beam installations. Rated for -25 to 55 °C ambient. Cable connection – verify polarity for NPN output and power supply before energizing.","metaTitle":"OMRON E3S-AT21-D Through-Beam Receiver, 7 m, NPN","metaDescription":"Used OMRON E3S-AT21-D through-beam photoelectric receiver. 7 m range, NPN output, selectable Dark-ON/Light-ON. 10-30 V DC, cable connection. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Photoelectric Sensors"],"specifications":{"Type":"Through Beam Photoelectric Sensor – Receiver","Model":"E3S-AT21-D","Weight":"0,04 kg","Housing":"Rectangular","Condition":"Used","Shelf No.":"230105","Manufacturer":"OMRON","Connector type":"Cable","Operating range":"7 m","lifecycle_stage":"current","Switching Output":"Dark-ON/Light-ON – Selectable","Electrical Design":"NPN","Operating Voltage":"10 … 30 V DC","Operating Temperature":"-25 … 55 °C"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/E3S-AT21-D/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/omron/E3S-AT21-D","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/E3S-AT21-D when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}