{"product_id":"sparkfun-sen-24805","title":"SparkFun Ultrasonic Distance Sensor - TCT40 (Qwiic)","description":"\u003cp\u003e\u003cstrong\u003eAffiliate disclosure:\u003c\/strong\u003e Everything About Robotics may earn a commission from qualifying purchases through this link. SparkFun handles checkout, fulfillment and returns.\u003c\/p\u003e\n\u003cp\u003eThe TCT40 Qwiic sensor measures distance with sound and sends readings over I2C. Its Qwiic connections simplify wiring to a compatible host, while separate trigger and echo pins provide another integration route. This makes it a useful component for comparing ultrasonic sensing with optical time-of-flight sensing in a robotics lesson. SparkFun lists a 2–400 cm measurement range and notes that the sensor arrives uncalibrated. Plan to calibrate and test it with the surfaces and placement used in the actual project before relying on its readings.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMeasurement method\u003c\/th\u003e\n\u003ctd\u003eUltrasonic; TCT40 transducers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSupplier range\u003c\/th\u003e\n\u003ctd\u003e2–400 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eOperating voltage\u003c\/th\u003e\n\u003ctd\u003e3.3 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInterface\u003c\/th\u003e\n\u003ctd\u003eI2C through Qwiic; exposed trigger\/echo pins\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDefault I2C address\u003c\/th\u003e\n\u003ctd\u003e0x2F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCalibration\u003c\/th\u003e\n\u003ctd\u003eShips uncalibrated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eSupplier price checked October 23, 2026:\u003c\/strong\u003e US$11.50; listed in stock at SparkFun. Price and availability may change. SparkFun confirms taxes, shipping, delivery and returns at its checkout.\u003c\/p\u003e\n\u003ch2\u003eBefore you buy\u003c\/h2\u003e\n\u003cp\u003eAllow for calibration and application testing. Supply a compatible controller, cable and power source for the project.\u003c\/p\u003e\n\u003cp\u003eCheck current price, availability, taxes, shipping and returns at SparkFun before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.sparkfun.com\/sparkfun-ultrasonic-distance-sensor-tct40-qwiic.html?affiliate_code=hDF5bFzOpu\u0026amp;referring_service=link\" rel=\"sponsored nofollow noopener\" target=\"_blank\" style=\"display:inline-block;min-height:44px;padding:12px 18px;box-sizing:border-box\"\u003eBuy at SparkFun\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.sparkfun.com\/sparkfun-ultrasonic-distance-sensor-tct40-qwiic.html\" rel=\"noopener\" target=\"_blank\"\u003eOfficial product specifications and documentation\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003csmall\u003eProduct photograph: SparkFun Electronics, used with permission.\u003c\/small\u003e\u003c\/p\u003e","brand":"SparkFun","offers":[{"title":"Default Title","offer_id":67828351271101,"sku":"SEN-24805","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0785\/7281\/4525\/files\/SEN-24805-Ultrasonic-Distance-Sensor-Feature_2.jpg?v=1792324414","url":"https:\/\/shop.everythingaboutrobotics.com\/products\/sparkfun-sen-24805","provider":"Everything About Robotics","version":"1.0","type":"link"}