{"product_id":"pololu-qtr-1a-reflectance-sensor-analog-output-2-pack","title":"Pololu QTR-1A Reflectance Sensor – Analog IR Line Sensor (2 Pack)","description":"\u003ch3\u003eDescription \u003c\/h3\u003e\n\u003cp\u003eThe Pololu QTR-1A Reflectance Sensor is a compact infrared reflectance module designed for line detection, edge sensing, and short-range proximity measurement. It integrates an IR LED and phototransistor that produce an analog voltage proportional to reflected light intensity. Operating at 5 V with a typical current consumption of 17 mA, the sensor delivers reliable readings for high-contrast surface detection. Its small 12.7 × 7.6 mm footprint allows installation in dense arrays, making it suitable for robotics, automation, and embedded sensing applications.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"0\" data-end=\"22\"\u003eFeatures\u003c\/h3\u003e\n\u003cul data-start=\"24\" data-end=\"609\"\u003e\n\u003cli data-start=\"24\" data-end=\"105\"\u003eInfrared LED and phototransistor reflectance sensing pair\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"24\" data-end=\"105\"\u003eAnalog voltage output proportional to reflected IR light\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"24\" data-end=\"105\"\u003e5 V operating voltage compatible with microcontrollers\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"24\" data-end=\"105\"\u003eTypical current consumption around 17 mA\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"24\" data-end=\"105\"\u003eHigh sensitivity for line detection and contrast sensing\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"24\" data-end=\"105\"\u003eOptimal sensing distance around 3 mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"24\" data-end=\"105\"\u003eMaximum recommended detection distance up to 6 mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"24\" data-end=\"105\"\u003eCompact 12.7 × 7.6 mm PCB for dense sensor arrays\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"24\" data-end=\"105\"\u003eIntegrated current-limiting resistor for safe LED operation\u003c\/li\u003e\n\u003cli data-start=\"24\" data-end=\"105\"\u003eSuitable for line follower and edge detection robots\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"24\" data-end=\"105\"\u003eDirect interface with analog inputs on Arduino boards\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"24\" data-end=\"105\"\u003eSupplied as 2 sensors per package\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"85\" data-end=\"110\"\u003eOperating Voltage: 5V DC\u003c\/li\u003e\n\u003cli data-start=\"85\" data-end=\"110\"\u003eTypical Current Consumption: 17mA\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"85\" data-end=\"110\"\u003eOutput Type: Analog Voltage Output\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"85\" data-end=\"110\"\u003eOutput Voltage Range: 0V to Supply Voltage\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"85\" data-end=\"110\"\u003eOptimal Sensing Distance: 3mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"85\" data-end=\"110\"\u003eMaximum Recommended Distance: 6mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"85\" data-end=\"110\"\u003eIR Emitter Type: Infrared LED\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"85\" data-end=\"110\"\u003eReceiver Type: Phototransistor with Pull-up Resistor\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"85\" data-end=\"110\"\u003ePCB Dimensions: 12.7mm × 7.6mm × 2.5mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"85\" data-end=\"110\"\u003eMounting Orientation: Parallel to sensing surface\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"85\" data-end=\"110\"\u003eInterface Type: Analog Input (ADC)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"85\" data-end=\"110\"\u003eSensor Weight: 0.2g per sensor\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"85\" data-end=\"110\"\u003ePack Quantity: 2 Sensors\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eLinks\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.pololu.com\/docs\/0J13\" target=\"_blank\"\u003ePololu QTR Reflectance Sensor Application Note\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003e(pdf)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.pololu.com\/file\/0J117\/QRE1113GR.pdf\" target=\"_blank\"\u003eDatasheet of Fairchild's QRE1113GR sensor\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003e(pdf)\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"Pololu QTR-1A Reflectance Sensor Analog Output (2-Pack)\" href=\"https:\/\/grabcad.com\/library\/line-sensor-qtr-1a-qre1113-1\" target=\"_blank\"\u003e3D model from grabcad.com\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"http:\/\/www.pololu.com\/docs\/0J20\" target=\"_blank\"\u003ePololu AVR library\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"http:\/\/www.pololu.com\/docs\/0J19\" target=\"_blank\"\u003eArduino library\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3\u003eTutorials\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/www.pololu.com\/docs\/0j13\/all\" target=\"_blank\"\u003ePololu QTR-1A Reflectance Sensor Tutorial\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca rel=\"noopener\" href=\"https:\/\/www.youtube.com\/watch?v=mLl3TS0e934\" target=\"_blank\"\u003eSensor Qtr1a-Pololu\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Cytron","offers":[{"title":"Default Title","offer_id":39696517693542,"sku":"VT-2574","price":25.0,"currency_code":"QAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2822\/2674\/products\/voltaat-qtr-1a-reflectance-sensor-2-pack-28936050606182.jpg?v=1656115344","url":"https:\/\/www.voltaat.com\/products\/pololu-qtr-1a-reflectance-sensor-analog-output-2-pack","provider":"Voltaat","version":"1.0","type":"link"}