Product Specification

4-20SC-MaxSonar-WR/WRC Series
High Resolution, Precision, IP67 Weather Resistant, Ultrasonic Range  Finders
MB7760, MB7769, MB7780, MB7789

4-20SC-MaxSonar-WR Series Ultrasonic Precision Rangefinders Product Description
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 50-cm (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 target
? Reading-to-reading stability of 1.6-mm at 1-meter is typical
? Compensation for target size variation and operating voltage range
? Temperature compensation is standard
? Additional chemical resistance available

Low Power Requirements
? 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

Easy to Use Component
? 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 noise
? Calibrated sensor eliminates most sensor-to-sensor variations

4-20SC-MaxSonar-WR Series Ultrasonic Precision Rangefinders General Characteristics
? 4-20mA with ~1.6mm resolution
? Refresh rate of ~0.60Hz
? Determines range to largest object (MB7769, MB7789)
? Determines range to first detectable object (MB7760, MB7767, MB7780, MB7787)
? Excellent clutter rejection
? Low-cost ultrasonic rangefinder
? Resolution of ~1.6-mm
? Distance from 50-cm to 5-meters
? Excellent MTBF of > 200,000 hrs.
? Superior noise rejection
? Operating temperature range from -40°C to +65°C
? Operating voltage from 10V to 32V
? IP67 rated

4-20SC-MaxSonar-WR Series Ultrasonic Precision Rangefinders Applications & Uses
? Automated process control systems
? Tank level measurement
? Weather station monitoring
? Bin level measurement
? Corn level measurement
? Proximity zone detection
? People detection
? Robot ranging
? Long range object detection
? Environments with acoustic and electric noise
? Height monitors
? Auto sizing
? Box dimensions

4-20SC-MaxSonar-WR Series Ultrasonic Precision Rangefinders Part Numbers
All part numbers are a combination of a six-character base followed by a dash and a three-digit product code. Please review the following table for more information on the three-digit product code.


The following tables display all of the active and valid part numbers for these products.