{"id":3417,"date":"2026-02-28T12:30:00","date_gmt":"2026-02-28T12:30:00","guid":{"rendered":"https:\/\/pirhome.com\/?p=3415"},"modified":"2026-02-28T12:30:00","modified_gmt":"2026-02-28T12:30:00","slug":"pir-heavy-clothing-detection","status":"publish","type":"post","link":"http:\/\/www.pirhome.com\/?p=3417","title":{"rendered":"PIR Sensor Not Detecting People Wearing Heavy Clothing"},"content":{"rendered":"<h2>Introduction<\/h2>\n<p>In cold climates, people wear heavy clothing that insulates body heat. This can reduce the infrared signal reaching the PIR sensor, making detection difficult.<\/p>\n<h2>Why Heavy Clothing Affects Detection<\/h2>\n<p>PIR sensors detect the infrared radiation emitted by a person&#8217;s skin and clothing. Heavy, insulated clothing:<\/p>\n<ul>\n<li>Blocks body heat from reaching the surface.<\/li>\n<li>The outer surface of the clothing may be near ambient temperature.<\/li>\n<li>Reduces the temperature difference between person and background.<\/li>\n<\/ul>\n<h2>Symptoms<\/h2>\n<ul>\n<li>Sensor detects people in summer but not in winter.<\/li>\n<li>People wearing heavy coats are not detected until very close.<\/li>\n<li>Detection range decreases in cold weather.<\/li>\n<\/ul>\n<h2>Solutions<\/h2>\n<h3>1. Increase Sensitivity<\/h3>\n<p>Turn sensitivity to maximum. This may help detect the smaller signal.<\/p>\n<h3>2. Use a More Sensitive Sensor<\/h3>\n<p>High-quality sensors with lower NEP (like Panasonic EKMB) can detect smaller temperature differences.<\/p>\n<h3>3. Use a Sensor with Better Low-Temperature Performance<\/h3>\n<p>Some sensors maintain sensitivity better at low ambient temperatures.<\/p>\n<h3>4. Focus on Uncovered Areas<\/h3>\n<p>If possible, aim the sensor at areas where people might have exposed skin (face, hands) \u2013 but this is difficult.<\/p>\n<h3>5. Use a Different Technology<\/h3>\n<p>Microwave or mmWave radar sensors detect motion regardless of clothing insulation, as they don&#8217;t rely on body heat.<\/p>\n<h3>6. Combine with Other Sensors<\/h3>\n<p>Use PIR in conjunction with a microwave sensor. The PIR can detect unclothed areas, microwave confirms presence.<\/p>\n<h2>Case Study: Arctic Research Station<\/h2>\n<p>At a research station in Greenland, standard PIR sensors failed to detect personnel in heavy Arctic gear. Switching to microwave sensors solved the problem completely.<\/p>\n<h2>Conclusion<\/h2>\n<p>Heavy clothing reduces PIR effectiveness. In cold climates, consider alternative technologies or combine with other sensor types.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction In cold climates, people wear heavy clothing that insulates body heat. This can reduce the infrared signal reaching the PIR sensor, making detection difficult. Why Heavy Clothing Affects Detection PIR sensors detect the infrared radiation emitted by a person&#8217;s skin and clothing. Heavy, insulated clothing: Blocks body heat from reaching the surface. The outer [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-3417","post","type-post","status-publish","format-standard","hentry","category-troubleshooting"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\r\n<title>PIR Sensor Not Detecting People Wearing Heavy Clothing - 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=\"https:\/\/www.pirhome.com\/?p=3417\" \/>\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 Not Detecting People Wearing Heavy Clothing - PIRHOME\" \/>\r\n<meta property=\"og:description\" content=\"Introduction In cold climates, people wear heavy clothing that insulates body heat. 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