{"title":"URM15 - 75KHZ Ultrasonic Sensor (30~500cm, RS485)","handle":"urm15-75khz-ultrasonic-sensor-30-500cm-rs485","url":"/products/urm15-75khz-ultrasonic-sensor-30-500cm-rs485","description":"The DFRobot URM15 is an industrial-grade ultrasonic ranging sensor with an IP65-rated waterproof probe. It provides an effective measuring range of 30–500 cm (tested against a flat wall) and communicates via an RS485 interface using the standard Modbus RTU protocol, making it compatible with PLCs and other industrial controllers.\n\nThe sensor features a 75 kHz ultrasonic transducer with a 40 mm diameter, delivering a relatively narrow beam angle (20° ±2°) and high sensitivity. Built-in temperature compensation — selectable between onboard and external sources — helps reduce the impact of ambient temperature variations on measurement accuracy.\n\nKey Features\n\n\nIP65 Waterproof Probe – Suitable for outdoor and harsh-environment installations\n\nRS485 / Modbus RTU – Standard industrial communication protocol\n\nConfigurable Address & Serial Parameters – Supports multiple sensors on a single bus\n\nTemperature Compensation – Onboard or external, for improved accuracy across temperature ranges\n\nNarrow Beam Angle – 20° ±2° (−6 dB) for focused detection\n\n\nSpecifications\n\n\nOperating Voltage – 5–12 V DC\n\nMax Instantaneous Current – 350 mA\n\nEffective Measuring Range – 30–500 cm\n\nDistance Resolution – 10 mm\n\nDistance Error – ±1%\n\nTemperature Resolution – 0.1 °C\n\nTemperature Error – ±1 °C\n\nMeasuring Frequency – 10 Hz\n\nOperating Temperature – −10 °C to +70 °C\n\nOperating Humidity – RH <75%\n\nAcoustic Frequency – 75 kHz ±2%\n\nDirectional Angle – 20° ±2° (−6 dB)\n\nCommunication – RS485 (Modbus RTU)\n\n\nResources\n\nProduct Wiki\n\n\nPackage Contents\n\n1× URM15 75 kHz Ultrasonic Sensor\n","vendor":"DFRobot","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":1835,"title":"Default Title","sku":"DF-SEN0519","price":170.33,"on_sale":false,"in_stock":true,"available_quantity":43,"option1":"Default Title"}]}