4-20SC-MaxSonar® -WR/WRC™ Series
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High Resolution, Precision, IP67 Weather Resistant, Ultrasonic Range Finders MB7760, MB7769, MB7780, MB77894 The 4-20SC-MaxSonar-WR sensor line is a high performance ultrasonic precision rangefinder that provides high accuracy, high resolution ultrasonic range detection in air. The 4-20SC-MaxSonar-WR sensor line includes an effective self-cleaning capability designed to reduce the impact of condensation in closed or high-moisture (dew, frost, etc.) environments and is a cost-effective solution for automation/process control applications where precision range-finding, low-voltage operation, space saving, low cost and IP67 weather resistance is needed. This sensor component allows users of other more costly precision rangefinders to lower the cost of their systems without sacrificing performance. The sensor output works with existing PLC equipment and is also suitable for applications with long cable runs. The 4-20SC-MaxSonar-WR/WRC sensor line features 1.6-mm resolution, superior rejection of outside noise sources, internal speed-of-sound temperature compensation and optional external speed-of-sound temperature compensation. The sensors are factory calibrated to provide stable and reliable range readings. With a maximum range of 5 meters, these ultrasonic sensors detect objects from 5-mm and ranges to objects from 50-cm to maximum range. Objects closer than 50-cm are typically reported as 50cm (See Close Range Operation). Precision Ultrasonic Range Sensing • A fraction of the cost of other precision rangefinders • Factory-matched accuracy provides a typical accuracy of 1% or better of distance to target1 • Reading-to-reading stability of 1.6-mm at 1-meter is typical1 • Compensation for target size variation and operating voltage range • Temperature compensation is standard • Additional chemical resistance available2 • Average power draw of ~70mA • Other interfaces (non4-20mA) available with lower current draw • Flexible, low supply voltage requirements simplifies battery powered designs • Low current draw reduces current drain for battery operation Robust and easy to use interface Excellent noise rejection Small and easy to mount Stable, reliable range readings Target size compensation provides greater consistency and accuracy • Auto handles acoustic noise1,3 • Calibrated sensor eliminates most sensor-to-sensor variations • Operating temperature range from -40°C to +65°C • Operating voltage from 10V to 32V • IP67 rated Applications & Uses • • • • • • • • • • Automated process control systems Tank level measurement Weather station monitoring Bin level measurement Corn level measurement1 Proximity zone detection General Characteristics People detection • 4-20mA with ~1.6mm resolution Robot ranging • Refresh rate of ~0.60Hz Long range object detection • Determines range to largest object Environments with acoustic and (MB7769, MB7789) electric noise • Determines range to first detectable • Height monitors object (MB7760, MB7767, MB7780, • Auto sizing MB7787) • Box dimensions • Excellent clutter rejection Notes • Low-cost ultrasonic rangefinder 1 Users to evaluate the sensor performance • Resolution of ~1.6-mm 2 F-Option provides added protection from hazardous • Distance from 50-cm to 5-meters chemical environments 3 By design • Excellent MTBF of > 200,000 hrs. 4 Please reference page 12 for part number key • Superior noise rejection4 Close Range Operation Applications requiring 100% reading-to-reading reliability should not use MaxSonar sensors at a distance closer than 50cm. Although most users find MaxSonar sensors to work reliably from 0 to 50cm for detecting objects in many applications, MaxBotix® Inc. does not guarantee operational reliability for objects closer than the minimum reported distance. Because of ultrasonic physics, these sensors are unable to achieve 100% reliability at close distances. _______________________________________________________________________________________________________________________________________ Warning: Personal Safety Applications We do not recommend or endorse this product be used as a component in any personal safety applications. This product is not designed, intended or authorized for such use. These sensors and controls do not include the self-checking redundant circuitry needed for such use. Such unauthorized use may create a failure of the MaxBotix® Inc. product which may result in personal injury or death. MaxBotix® Inc. will not be held liable for unauthorized use of this component. Copyright 2005 - 2014 MaxBotix Incorporated Patent 7,679,996

4-20SC-MaxSonar-WR/WRC General Operation The 4-20SC-MaxSonar-WR ultrasonic sensors are in-air, non-contact, object detection and ranging sensors that detect objects within an area. These sensors are not affected by the color or other visual characteristics of the detected object. Ultrasonic sensors use high frequency sound to detect and localize objects in a variety of environments. Ultrasonic sensors measure the time of flight for sound that has been transmitted to and reflected back from nearby objects. Based on the time of flight, the sensor outputs a distance value. 4-20 Sensor...

About Ultrasonic Sensors The 4-20SC-MaxSonar-WR ultrasonic sensors are in-air, non-contact object detection and ranging sensors that detect objects within an area. These sensors are not affected by the color or other visual characteristics of the detected object. Ultrasonic sensors use high frequency sound to detect and localize objects in a variety of environments. Ultrasonic sensors measure the time of flight for sound that has been transmitted to and reflected back from nearby objects. Based upon the time of flight, the sensor outputs a range reading....

About Package Types The 4-20SC-MaxSonar-WR sensors are available in a variety of packages for applications with specific mounting requirements. The full horn package provides peak accuracy and sensitivity in this sensor line. It is recommended that testing is completed to ensure that the selected sensor will operate as desired in your application. Package Types Currently Available Full Horn – 3/4” NPT straight; back mounted thread (best performance) Compact – 3/4” NPT straight; back mounted thread 1”NPS – External thread over full sensor body (1”NPS) 1”BSPP – External thread over full...