{"title":"4-20HR-MaxSonar-WRMI(MB7489)","handle":"4-20hr-maxsonar-wrmi-mb7489","url":"/products/4-20hr-maxsonar-wrmi-mb7489","description":"The MB7489 4-20HR-MaxSonar-WRMI is a rugged, weather-resistant ultrasonic distance sensor designed for outdoor applications. It provides millimetre-resolution distance readings from 500mm to 5000mm using a 4–20mA analogue current output (20mA at minimum range, 4mA at maximum range), making it directly compatible with industrial PLCs and data acquisition systems.\n\nThe sensor is housed in a compact, robust PVC enclosure rated to IP67, compatible with standard 3/4-inch PVC pipe fittings. It uses advanced signal processing — including continuously variable gain, real-time background calibration, waveform signature analysis, and noise rejection algorithms — to provide reliable readings even in noisy environments.\n\nKey Features\n\n\nWeather Resistant – IP67-rated PVC housing for outdoor use\n\n4–20mA Output – Industry-standard analogue current interface\n\nMillimetre Resolution – ~1.6mm measurement resolution\n\nLong Range – 500mm to 5000mm detection range\n\nIntelligent Target Selection – Reports distance to the largest acoustic return, ignoring smaller targets and clutter\n\nFactory Calibrated – Narrow beam pattern for reliable long-range detection\n\n\nSpecifications\n\n\nModel – MB7489\n\nOperating Voltage – 10–32V\n\nOperating Current – 40mA\n\nDetection Range – 500–5000mm (objects closer than 500mm typically read as 500mm)\n\nResolution – ~1.6mm\n\nRead Rate – 7.5Hz\n\nUltrasonic Frequency – 42kHz\n\nOutput – 4–20mA analogue current\n\nOperating Temperature – −40°C to +65°C\n\nIngress Protection – IP67\n\n\nIdeal For\n\nOutdoor tank and bin level monitoring\nIndustrial distance measurement\nEnvironmental monitoring stations\nAutomated fill-level detection\n\n\nPackage Contents\n\n1× MB7489 4-20HR-MaxSonar-WRMI ultrasonic sensor\n\n\nResources\n\n4-20HR-MaxSonar-WR Datasheet (PDF)\n","vendor":"DFRobot","product_type":"physical","in_stock":false,"options":[],"variants":[{"id":4975,"title":"Default Title","sku":"DF-SEN0266","price":215.77,"on_sale":false,"in_stock":false,"available_quantity":0,"option1":"Default Title"}]}