{"title":"URM13 Ultrasonic Sensor","handle":"urm13-ultrasonic-sensor","url":"/products/urm13-ultrasonic-sensor","description":"The DFRobot URM13 is a compact ultrasonic ranging sensor with an open single-probe design. It supports three communication methods — TRIG pulse (SR04-compatible), UART, and I2C — making it versatile for a wide range of applications. The sensor operates on 3.3 V or 5 V, compatible with Arduino, Raspberry Pi, and other common development boards.\n\nAn integrated precision circuit and smart detection algorithms enable automatic ambient and electrical noise detection, with real-time calibration of sensor parameters for stable performance in demanding environments. In UART mode, the sensor uses the standard Modbus-RTU protocol with receive/send control output, allowing easy expansion to RS485 via an external transceiver.\n\nKey Features\n\n\nTriple Interface – TRIG pulse (SR04-compatible), UART (Modbus-RTU), and I2C\n\nWide Measuring Range – 15 cm to 900 cm with 1 cm resolution\n\nAutomatic Noise Calibration – Real-time detection and adjustment for ambient and electrical noise\n\nRS485 Ready – UART mode with Modbus-RTU and TX/RX control output for RS485 expansion\n\nCompact Design – Small, lightweight single-probe form factor\n\nWide Voltage Range – 3.3–5.5 V DC\n\n\nSpecifications\n\n\nPower Supply – 3.3–5.5 V DC\n\nMax Current – 350 mA (instantaneous)\n\nMeasuring Range – 15–900 cm\n\nResolution – 1 cm\n\nAccuracy – 1%\n\nMeasuring Frequency – Up to 10 Hz\n\nOperating Temperature – −10 °C to +70 °C\n\nDimensions – 22 × 20 mm\n\n\nIdeal For\n\nRobotics obstacle detection and navigation\nDistance measurement and level sensing\nIndustrial monitoring with RS485 networks\nArduino and Raspberry Pi projects\n\n\nPackage Contents\n\n1× URM13 Ultrasonic Sensor\n\n\nResources\n\nProduct Wiki (DFRobot)\n","vendor":"DFRobot","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":3587,"title":"Default Title","sku":"DF-SEN0352","price":40.62,"on_sale":false,"in_stock":true,"available_quantity":52,"option1":"Default Title"}]}