{"product_id":"hc-sr501-human-infrared-module-pyroelectric-infrared-sensor-sr501-blue-board-green-board-33v-1x2-degrees-precision-15-70-degrees-response-time-1-3ms-motion-detection","title":"HC-SR501 Human Infrared Module Pyroelectric Infrared Sensor SR501 Blue Board Green Board 33V 1x2 Degrees Precision -15~70 Degrees Response Time 1-3ms Motion Detection","description":"\u003ch1\u003eHC-SR501 Pyroelectric Infrared Sensor Module for Motion Detection with 33V Supply and Fast Response\u003c\/h1\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"HC-SR501 pyroelectric infrared sensor module on blue board for motion detection with 33V power\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/5071\/2025-10-27\/original-image\/08503d98-9f30-463e-9f70-57c7f1c72dbe_fine.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThe HC-SR501 human infrared module is a pyroelectric infrared sensor designed to detect human motion across a wide temperature range from -15 to 70 degrees Celsius. With a response time of just 1-3ms and precision of 1x2 degrees this sensor delivers reliable performance for security systems automatic lighting and motion-activated projects. Operating on a 33V power supply it provides a straightforward interface for integration into existing circuits or new builds making it a practical choice for both hobbyists and professionals.\u003c\/p\u003e\u003ch2\u003eFeatures and Construction\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"HC-SR501 pyroelectric infrared sensor module on blue board for motion detection with 33V power\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/5071\/2025-10-27\/original-image\/28da77aa-9356-451c-b267-50f435503b3c_fine.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThis infrared module comes in two variants SR501 blue board and SR501 green board offering flexibility for different applications. Its construction focuses on dependable motion sensing without unnecessary complexity.\u003c\/p\u003e\u003ch3\u003eTemperature Range and Response\u003c\/h3\u003e\u003cp\u003eThe sensor functions effectively in temperatures from -15 to 70 degrees Celsius enabling use in both cold and moderate environments. The 1-3ms response time ensures near-instantaneous detection of movement suitable for time-sensitive applications like alarm triggers or automatic door openers.\u003c\/p\u003e\u003ch3\u003ePower and Precision\u003c\/h3\u003e\u003cp\u003eWith a power supply voltage of 33V the module requires minimal setup and is compatible with many standard electronics projects. The precision rating of 1x2 degrees indicates accurate detection focused on human-scaled motion reducing false triggers from small animals or environmental changes.\u003c\/p\u003e\u003ch3\u003eBoard Variants\u003c\/h3\u003e\u003cp\u003eAvailable as SR501 blue board or SR501 green board both share the same core specifications so you can choose based on availability or colour preference for your project. No performance difference exists between the two options.\u003c\/p\u003e\u003ch2\u003eUses and Placement\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"HC-SR501 pyroelectric infrared sensor module on blue board for motion detection with 33V power\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/5071\/2025-10-27\/original-image\/69f50fb5-30b7-4331-837f-9c1c578a5685_fine.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThis pyroelectric sensor is suited for indoor and outdoor applications where human presence detection is required. Its wide operating range and fast response make it versatile for security automation and energy-saving systems.\u003c\/p\u003e\u003ch3\u003eSecurity and Automation\u003c\/h3\u003e\u003cp\u003ePair the sensor with an alarm or microcontroller to detect unauthorised entry or automate lighting in corridors and entrance areas. The quick response time minimises delay between movement and system reaction.\u003c\/p\u003e\u003ch3\u003eEveryday Home Use\u003c\/h3\u003e\u003cp\u003eUse the module for automatic lights in garages hallways or pantries where hands-free operation adds convenience. Its sensitivity and precision help avoid nuisance triggers from pets or passing vehicles.\u003c\/p\u003e\u003ch2\u003eBenefits and Buying Value\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"HC-SR501 pyroelectric infrared sensor module on blue board for motion detection with 33V power\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/5071\/2025-10-27\/original-image\/735750d4-e4ce-4b37-aad4-e65940c1db64_fine.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThe HC-SR501 offers a cost-effective way to add motion detection to projects with minimal wiring and power requirements. Its straightforward design and available board colours simplify integration.\u003c\/p\u003e\u003ch3\u003eReuse and Low Maintenance\u003c\/h3\u003e\u003cp\u003eOnce installed the sensor requires little upkeep beyond occasional lens cleaning. Its solid-state construction means no moving parts to wear out making it suitable for long-term fixed installations.\u003c\/p\u003e\u003ch3\u003eWhy Choose This Product\u003c\/h3\u003e\u003cp\u003eThis module delivers reliable human detection across a broad temperature range at a fast response speed. The choice of blue or green board and simple 33V power connection make it an accessible component for electronics enthusiasts and professionals alike.\u003c\/p\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"HC-SR501 pyroelectric infrared sensor module on blue board for motion detection with 33V power\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/5071\/2025-10-27\/original-image\/7ccc0ef3-8f45-4440-ae42-360519b999c2.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"HC-SR501 pyroelectric infrared sensor module on blue board for motion detection with 33V power\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/5071\/2025-10-27\/original-image\/b044fe4c-f9e2-4666-8455-b5ccfcc213b1.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"HC-SR501 pyroelectric infrared sensor module on blue board for motion detection with 33V power\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/5071\/2025-10-27\/original-image\/d5180207-cf92-42aa-8a4c-5b3a70f4ed0a_fine.webp\"\u003e\u003c\/div\u003e","brand":"psdxp6-30","offers":[{"title":"SR501 Green Board \/ 33V \/ 1x 2 Degrees","offer_id":55346368872790,"sku":"CJYD252969002BY","price":10.88,"currency_code":"GBP","in_stock":true},{"title":"SR501 Blue Board \/ 33V \/ 1x 2 Degrees","offer_id":55346368905558,"sku":"CJYD252969001AZ","price":10.88,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1018\/5352\/8406\/files\/69f50fb5-30b7-4331-837f-9c1c578a5685_fine.webp?v=1789304347","url":"https:\/\/elmworth.co.uk\/products\/hc-sr501-human-infrared-module-pyroelectric-infrared-sensor-sr501-blue-board-green-board-33v-1x2-degrees-precision-15-70-degrees-response-time-1-3ms-motion-detection","provider":"Elmworth.co.uk","version":"1.0","type":"link"}