XL-TrashSonar™-WR™ Series
XL-TrashSonar™-WR™ Series
IP67 Weather Resistant, Ultrasonic Trash Sensor
MB7137, MB7138, MB71393
The XL-TrashSonar-WR sensor series provide users with robust range
information in air. These sensors also feature high-power acoustic output along
with real-time auto calibration for changing conditions (supply voltage sag,
acoustic noise, or electrical noise), operation with supply voltage from 3.0V to
5.5V, object detection from 0-cm to 350-cm, and sonar range information from
20-cm2 out to 350-cm with 1-cm resolution. Objects from 0-cm to 20-cm2
typically range as 20-cm2. The sensor is housed in a robust PVC housing,
designed to meet the IP67 water intrusion standard. This sensor line is available in the following package types
— 3/4” PVC threading, 1” NPS pipe threading, 1” BSPP pipe threading, and 30mm 1.5 pipe threading. The
user interface formats included are pulse-width, analog voltage output, RS232 serial output, and
I2C (MB7137).
225-cm ( MB7138 Pipe and Compact only )
Features
Benefits
Applications & Uses
• Real-time auto calibration and noise • Acoustic and electric noise
• Tank level measurement
• Bin level measurement
• Trash level measurement
• Environments with acoustic and
electrical noise
rejection
resistance
• High acoustic power output
• Reliable and stable range data
• Robust, low cost IP67 standard
sensor
• Narrow beam characteristics
• Very low power excellent for battery
based systems
• Precise narrow beam
• Object detection includes zero range
objects
• Distance measuring
• 3V to 5.5V supply with very low
• Long range object detection
• Industrial sensor
average current draw1
• -40C to +65C operation1
• Free run operation can continually
measure and output range
information
• Triggered operation provides the
range reading as desired
• All interfaces are active
simultaneously
• RS232 Serial, 0 to Vcc, 9600 Baud,
81N (MB7138, MB7139)
• I2C Bus operates up to 400KHz with
clock stretching (MB7137)
• Analog, (Vcc/1024) / cm (MB7138,
MB7139)
• Ranging can be triggered externally
or internally
• Sensor reports the range reading
directly, frees up user processor
• Easy hole mounting or mating with
standard electrical fittings
• Filtering allows very reliable
operation in most environments
Notes:
1Please reference page 16 for minimum operating
voltage verses temperature information.
2Minimum distance is 25-cm for the MB7138 pipe
and compact only.
3 Please reference page 21 for part number key.
• Sensor operates at 42KHz
Close Range Operation
Applications requiring 100% reading-to-reading reliability should not use MaxSonar sensors at a distance closer than 20-
cm2. Although most users find MaxSonar sensors to work reliably from 0 to 20-cm2 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.
225cm (MB7138 pipe and compact only)
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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.
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Web: www.maxbotix.com
PD13516k
MaxBotix® Inc.
MaxBotix Inc., products are engineered and assembled in the USA
Copyright 2005 - 2021 MaxBotix Incorporated
Patent 7,679,996