{"id":3323,"date":"2026-02-22T04:30:00","date_gmt":"2026-02-22T04:30:00","guid":{"rendered":"https:\/\/pirhome.com\/?p=3321"},"modified":"2026-02-22T04:30:00","modified_gmt":"2026-02-22T04:30:00","slug":"pir-automatic-doors","status":"publish","type":"post","link":"http:\/\/www.pirhome.com\/?p=3323","title":{"rendered":"PIR Sensor for Automatic Doors: Design and Implementation"},"content":{"rendered":"<h2>Introduction<\/h2>\n<p>Automatic doors rely on sensors to detect approaching people and trigger the door mechanism. PIR sensors are a popular choice due to their low cost, reliability, and ability to detect warm bodies.<\/p>\n<h2>Types of Automatic Door Sensors<\/h2>\n<ul>\n<li><strong>PIR sensors:<\/strong> Detect body heat and motion.<\/li>\n<li><strong>Microwave sensors:<\/strong> Detect motion via Doppler radar.<\/li>\n<li><strong>Pressure mats:<\/strong> Detect weight on mat.<\/li>\n<li><strong>Push buttons:<\/strong> Manual activation.<\/li>\n<li><strong>Safety sensors:<\/strong> Prevent door from closing on person.<\/li>\n<\/ul>\n<h2>PIR Sensor Placement for Automatic Doors<\/h2>\n<h3>Approach Detection<\/h3>\n<p>One or more PIR sensors are mounted above the door, angled outward to detect people approaching. Typical detection zone: 2-4 meters in front of door, 2-3 meters wide.<\/p>\n<h3>Safety Sensors<\/h3>\n<p>Additional PIR sensors may be mounted to detect presence directly under the door to prevent closing on a person. These have a downward-facing narrow field.<\/p>\n<h2>Detection Zone Design<\/h2>\n<p>The approach detection zone should:<\/p>\n<ul>\n<li>Cover the expected path of approaching people.<\/li>\n<li>Not extend too far (to avoid false triggers from passersby).<\/li>\n<li>Have defined boundaries to minimize false triggers.<\/li>\n<\/ul>\n<h2>Integration with Door Controller<\/h2>\n<p>The PIR sensor output (typically relay or open-collector) connects to the door controller. When motion is detected, the controller activates the door motor.<\/p>\n<pre><code>PIR Sensor OUT \u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500 Door Controller Input\n                    \u2514\u2500\u2500\u2500\u2500 Pull-up resistor (if open-collector)\n<\/code><\/pre>\n<h2>Timing Considerations<\/h2>\n<ul>\n<li><strong>Hold time:<\/strong> How long door stays open after last detection. Typically 2-10 seconds adjustable.<\/li>\n<li><strong>Re-trigger:<\/strong> Should re-trigger if person lingers.<\/li>\n<li><strong>Close delay:<\/strong> After hold time, door closes.<\/li>\n<\/ul>\n<h2>Safety Standards<\/h2>\n<p>Automatic doors must comply with safety standards:<\/p>\n<ul>\n<li><strong>ANSI\/BHMA A156.10:<\/strong> Power-operated pedestrian doors.<\/li>\n<li><strong>EN 16005:<\/strong> Power-operated pedestrian doorsets.<\/li>\n<li><strong>UL 325:<\/strong> Door, drapery, gate, louvers, and window operators and systems.<\/li>\n<\/ul>\n<p>These standards require redundant safety sensors and fail-safe operation.<\/p>\n<h2>Redundancy Requirements<\/h2>\n<p>For safety, automatic doors often use dual technology (PIR + microwave) or multiple sensors so that failure of one sensor doesn&#8217;t cause a hazard.<\/p>\n<h2>Environmental Considerations<\/h2>\n<ul>\n<li><strong>Outdoor doors:<\/strong> Sensors must be weatherproof (IP65+).<\/li>\n<li><strong>Temperature range:<\/strong> Must operate in local climate extremes.<\/li>\n<li><strong>Sunlight:<\/strong> Direct sun can cause false triggers; use shaded mounting.<\/li>\n<\/ul>\n<h2>Case Study: Supermarket Entrance<\/h2>\n<p>A supermarket installed PIR sensors above each automatic door. The system used dual sensors per door (for redundancy) and achieved 99.9% reliability over two years.<\/p>\n<h2>Conclusion<\/h2>\n<p>PIR sensors are a reliable, cost-effective choice for automatic doors. Proper placement, zone design, and adherence to safety standards ensure safe and convenient operation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction Automatic doors rely on sensors to detect approaching people and trigger the door mechanism. PIR sensors are a popular choice due to their low cost, reliability, and ability to detect warm bodies. Types of Automatic Door Sensors PIR sensors: Detect body heat and motion. Microwave sensors: Detect motion via Doppler radar. Pressure mats: Detect [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-3323","post","type-post","status-publish","format-standard","hentry","category-reference"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\r\n<title>PIR Sensor for Automatic Doors: Design and Implementation - PIRHOME<\/title>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"http:\/\/www.pirhome.com\/?p=3323\" \/>\r\n<meta property=\"og:locale\" content=\"en_US\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"PIR Sensor for Automatic Doors: Design and Implementation - PIRHOME\" \/>\r\n<meta property=\"og:description\" content=\"Introduction Automatic doors rely on sensors to detect approaching people and trigger the door mechanism. 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