XL-MaxSonar
®
- WR/WRC
™
Series
XL-MaxSonar - WR/WRC Series
High Performance, IP67 Weather Resistant, Ultrasonic Range Finder
MB7051, MB7052, MB7060, MB7062, MB7066, MB7067, MB7068,
MB7070, MB7072, MB7076, MB7077, MB7078, MB7092
3
®
™
The XL-MaxSonar-WR and XL-MaxSonar-WRC 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 3V to 5.5V, object detection from 0-cm to 765-cm (select models) or
1068-cm (select models), and sonar range information from 20-cm
1
out to 765-cm (select models) or 1068-cm
(select models) with 1-cm resolution. Objects from 0-cm to 20-cm
1
range as 20-cm
1
or closer. The sensor is
housed in a robust PVC housing, designed to meet the IP67 water intrusion standard, and matches standard
electrical/water ¾” PVC pipe fittings. The user interface formats included are pulse-width (select models),
real-time analog-voltage envelope (select models), analog voltage output, and serial output.
1
25cm (MB7051, MB7052,
MB7092)
Features
•
Real-time auto calibration and noise
rejection
•
High acoustic power output
•
Precise narrow beam
•
Object detection includes zero range
objects
•
3V to 5.5V supply with very low
average current draw
•
Free run operation can continually
measure and output range
information
•
10Hz refresh rate (MB7060,
MB7062, MB7066, MB7070,
MB7072, MB7076, MB7092)
•
6.6Hz refresh rate (MB7052)
•
5.1Hz refresh rate (MB7051)
•
Triggered operation provides the
range reading as desired
•
All interfaces are active
simultaneously
•
RS232 Serial, 0 to Vcc, 9600 Baud,
81N
•
Analog, (Vcc/1024) / cm for
standard models
•
Analog, (Vcc/1024) / 2cm for
10-meter models (MB7051,
MB7066, MB7076)
•
Sensor operates at 42KHz
Applications and Uses
•
•
•
•
Tank level measurement
Bin level measurement
Proximity zone detection
Environments with acoustic and
electrical noise
Distance measuring
Long range object detection
Super high sensitivity for long range
small object detection (MB7051)
Industrial sensor -40°C to +65°C
(limited operation to +85°C)
2
Benefits
•
•
Acoustic and electrical noise
•
resistance
•
•
Reliable and stable range data
•
Robust, low cost IP67 standard
•
sensor
•
Narrow beam characteristics
•
Very low power excellent for battery
Notes:
1
Minimum distance is 25cm for the MB7051, MB7052,
based systems
MB7092
•
Ranging can be triggered externally
2
Please reference page 14 for minimum operating voltage
verses temperature information
or internally
3
Please reference page 23 for part number key
•
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
Close Range Operation
Applications requiring 100% reading-to-reading reliability should not use MaxSonar sensors at a distance closer than
20cm
1
. Although most users find MaxSonar sensors to work reliably from 0 to 20cm
1
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.
1
25cm (MB7051, MB7052, MB7092)
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.
MaxBotix
®
Inc.
Copyright 2005 - 2017 MaxBotix Incorporated
Patent 7,679,996
MaxBotix Inc., products are engineered and assembled in the USA
Page 1
Web:
www.maxbotix.com
PD11838n
XL-MaxSonar
®
- WR/WRC
™
Series
XL-MaxSonar-WR/WRC Pin Out
Pin 1-
Leave open (or high) for serial output on the Pin 5 output. When Pin 1 is held low the Pin 5 output sends a pulse
(instead of serial data), suitable for low noise chaining.
Pin 2-
This pin outputs a pulse-width representation of range. To calculate the distance, use a scale factor of 58uS per cm.
(MB7051, MB7052, MB7060, MB7062, MB7066, MB7067, MB7068)
This pin outputs the analog voltage envelope of the acoustic waveform. For the MB7070 series and MB7092 sensors, this
is a real-time always-active output (MB7070, MB7072, MB7076, MB7077, MB7078, MB7092)
Pin 3- AN-This
pin outputs analog voltage with a scaling factor of (Vcc/1024) per cm. A supply of 5V yields ~4.9mV/
cm., and 3.3V yields ~3.2mV/cm. Hardware limits the maximum reported range on this output to ~700 cm at 5V and ~600
cm at 3.3V. The output is buffered and corresponds to the most recent range data.
For the 10-meter sensors (MB7051, MB7066, MB7076) Pin 3 outputs an analog voltage with a scaling of (Vcc/1024) per
2cm. A supply of 5V yields ~4.9mV/2cm., and 3.3V yields ~3.2mV/2cm. This Analog Voltage output steps in 2cm
increments.
Pin 4- RX-
This pin is internally pulled high. If Pin-4 is left unconnected or held high, the sensor will continually measure
the range. If Pin-4 is held low the sensor will stop ranging. Bring high 20uS or more to command a range reading.
Pin 5- TX-
When Pin 1 is open or held high, the Pin 5 output delivers asynchronous serial data in an RS232 format,
except the voltages are 0-Vcc. The output is an ASCII capital “R”, followed by ASCII character digits representing the
range in centimeters up to a maximum of 765 (select models) or 1068 (select models), followed by a carriage return
(ASCII 13). The baud rate is 9600, 8 bits, no parity, with one stop bit. Although the voltages of 0V to Vcc are outside the
RS232 standard, most RS232 devices have sufficient margin to read the 0V to Vcc serial data. If standard voltage level
RS232 is desired, invert, and connect an RS232 converter such as a MAX232.When Pin 1 is held low, the Pin 5 output
sends a single pulse, suitable for low noise chaining (no serial data).
V+
Operates on 3V - 5.5V. The average (and peak) current draw for 3.3V operation is 2.1mA (50mA peak) and 5V
operation is 3.4mA (100mA peak) respectively. Peak current is used during sonar pulse transmit. Please reference page 14
for minimum operating voltage verses temperature information.
GND-Return
for the DC power supply. GND (& V+) must be ripple and noise free for best operation.
_______________________________________________________________________________________________________________________________________
About Ultrasonic Sensors
Our ultrasonic sensors are desired for use in air, non-contact object detection and ranging sensors that detect objects
within a defined 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 then outputs a range reading.
_____________________________________________________________________________________________________________________________________
Auto Calibration
Each time before the XL-MaxSonar-WR takes a range reading it auto calibrates. The sensor then uses this data to range
objects. If the temperature, humidity, or applied voltage changes during sensor operation, the sensor will continue to
function normally. (The sensors do not apply compensation for the speed of sound change verses temperature to any range
readings.) If the application requires temperature compensation please look at the HRXL-MaxSonar-WR sensor line.
_______________________________________________________________________________________________________________________________________
Supply Voltage Compensation
During power up, the XL-MaxSonar-WR sensor line will calibrate itself for the supply voltage. Additionally, the sensor
will compensate if the supplied voltage gradually changes.
If the average voltage applied to the sensor changes faster than 0.5V per second, it is best to remove and reapply power to
the sensor. For best operation, the sensor requires noise free power. If the sensor is used with noise on the supplied power
or ground, the accuracy of the readings may be affected. Typically, adding a 100uF capacitor at the sensor between the
V+ and GND pins will correct most power related electrical noise issues.
MaxBotix
®
Inc.
Copyright 2005 - 2017 MaxBotix Incorporated
Patent 7,679,996
MaxBotix Inc., products are engineered and assembled in the USA
Page 2
Web:
www.maxbotix.com
PD11838n
XL-MaxSonar
®
- WR/WRC
™
Series
Real-time Auto Calibration
The XL-MaxSonar-WR automatically calibrates prior to each range reading. The sensor then uses this data to range
objects. If the temperature, humidity, or applied voltage changes during sensor operation, the sensor will continue to
function normally. (The sensors do not apply compensation for the speed of sound change verses temperature to any range
readings.) Detection has been characterized in the published sensor beam patterns.
_______________________________________________________________________________________________________________________________________
Real-time Noise Rejection
While the XL-MaxSonar-WR is designed to operate in the presence of noise, best operation is obtained when noise
strength is low and desired signal strength is high. Hence, the user is encouraged to mount the sensor in such a way that
minimizes outside acoustic noise pickup. In addition, keep the DC power to the sensor free of noise. This will let the
sensor deal with noise issues outside of the users direct control (Even so, in general, the sensor will still function well
even if these things are ignored). Users are encouraged to test the sensor in their application to verify usability.
_______________________________________________________________________________________________________________________________________
Sensor Minimum Distance
The XL-MaxSonar-WR sensors have a minimum reported distance of 20-cm
1
(7.87 inches). However, the
XL-MaxSonar-WR will range and report targets to the front sensor face. Large targets closer than 20-cm
1
will typically
range as 20-cm
1
. For the alternative housings, objects between 4-cm and 20-cm will typically range as 20-cm.
Note 1: 25cm for the MB7051, MB7052, MB7092
_______________________________________________________________________________________________________________________________________
WR Exposed Materials
The exposed materials of a properly mounted MaxSonar WR standard sensor are: Aluminum (oxidized surface), PVC, &
silicone rubber (VMQ).
_______________________________________________________________________________________________________________________________________
Additional Options for Purchase
Please contact MaxBotix for any additional information regarding the options listed below at info@maxbotix.com.
F-Option
In addition to the standard MaxSonar WR, MaxBotix Inc. has developed the F-Option for additional protection necessary
in a few hazardous chemical environments. Extremely corrosive gases or liquids can degrade or compromise the operation
of the sensing unit. As a result, we offer a more chemically inert seal which allows our sensors to operate in all but the
harshest of chemical environments. In addition to the chemical resistance the sensor has improved performance in wet or
dust environments.
Please Note: Our sensors are designed for operation in normal atmosphere (air). Please be aware that the speed of sound
and atmospheric attenuation may change as a result of the transmission properties of different chemical/air
mediums. Users are strongly encouraged to characterize and test the operation of the sensor in the new medium to verify
operation, and properly scale the outputted range information.
The exposed materials of a properly mounted MaxSonar WR sensor with the F-Option added are: Aluminum (oxidized
surface), PVC, & Fluorosilicone (with an additional back up FEP Teflon® seal).
Shielded Cable Attach Option
For simple integration of our sensors into end-user applications, MaxBotix has developed the Shielded Cable Attach
Option to create a completely IP67 rated MaxSonar-WR sensor. The standard Shielded Cable Attach Option uses 3 feet of
the MaxSonar MB7954 Shielded Cable (MB7984 when attached by MaxBotix) with an epoxy filled cap to fully protect
the pin-out of the MaxSonar sensor. Additional cable length can be specified and purchased using part number MB7984.
P-Option
The P-Opiton is a Parylene coating applied to the surface of the aluminum transducer. This helps to improve the corrosion
resistance of the aluminum transducer. The exposed materials of a properly mounted MaxSonar WR sensor with the P-
Option added are: Parylene, PVC, & silicone rubber (VMQ). The F-Option can be purchased with the P-Option.
MaxBotix
®
Inc.
Copyright 2005 - 2017 MaxBotix Incorporated
Patent 7,679,996
MaxBotix Inc., products are engineered and assembled in the USA
Page 3
Web:
www.maxbotix.com
PD11838n
XL-MaxSonar
®
- WR/WRC
™
Series
Sensor Descriptions
Base Sensor (MB7060 and MB7070)
The MB7060 and MB7070 are the base models of the XL-MaxSonar-WR sensor line. These sensors are recommended
for general purpose usage. All other sensors in this series are based off these sensor models. The additional features are
mentioned in their respective sections below.
_______________________________________________________________________________________________________________________________________
XL-MaxSonar-WR1 (MB7062 and MB7072)
The XL-MaxSonar-WR1 sensors feature a 3 reading stability filter that ranges to the first detectable target. Filtering is
available on Pin3 (AN) and Pin 5 (TX). Filtering is not applied to the output on Pin 2 (PW). This filter requires that
3 consecutive range readings are within 1cm of each other to be considered a valid range reading. If the range readings are
outside 1cm, the sensor discards the range reading set and reports the last valid range reading. This sensor does not view
maximum range as a valid range, and will not report 765 when no target is detected. If this sensor does not detect a target
for 1 hour, the sensor will go into fail-safe and report 000.
_______________________________________________________________________________________________________________________________________
XL-MaxSonar-WRL (MB7066 and MB7076)
The XL-MaxSonar-WRL will report a maximum distance of 10 meters for large targets.
_______________________________________________________________________________________________________________________________________
XL-MaxSonar-WRM (MB7052 and MB7092)
The MB7052 and MB7092 sensors prioritize large targets over both small targets and noise. These sensors report the
target that gives the largest acoustic reflection. This stands in contrast to other units such as the MB7060 which are
designed to report the distance to the first detectable target. If the largest target is removed from the field of view, the
MB7052 and MB7092 will switch to the target that gives the next largest detectable return.
When targets are of similar amplitude reflections, preference is given to the closer target. The sensor expects to see a
target by 7.56 meters. If no target is found, the sensor will increase in sensitivity until a target is found, or until no targets
can be found.
In addition to the most-likely filtering, the MB7052 and MB7092 come equipped with a three-reading filter and reading
hold which requires three consecutive range readings within 1cm of the most recent reading to be considered a valid range
reading. If readings are found to be outside 1cm, or no target can be found by the sensor, then the sensor will report the
last valid range reading. Upon power-up the sensor will default to reporting 7.65 meters unit a valid range reading is
found.
The last reading hold is designed for users operating in environments with intermittent high noise who desire to poll the
MB7052 or MB7092 at intermittent times. This allows the sensor to report the previously valid reading until the sensor’s
environment improves. If no valid range reading is found for ~1.5 hours, the sensor will send a fail-safe output “000” on
all interfaces.
_______________________________________________________________________________________________________________________________________
XL-MaxSonar-WRML (MB7051)
The MB7051 includes all the features of the MB7052 with a maximum
distance of 10 meters which provides a very robust long range sensing
solution. The MB7051 is ideal for applications requiring small or soft
target detection at longer ranges than our previously mentioned XL-
MaxSonar-WR sensors.
The MB7051 has improved sensitivity to objects with the addition of a horn extension. This improvement results in the
sensor detecting objects of similar size about 2.5 times further in comparison to the MB7066 sensor. The detection
patterns of each are shown in the beam pattern section of the datasheet.
MaxBotix
®
Inc.
Copyright 2005 - 2017 MaxBotix Incorporated
Patent 7,679,996
MaxBotix Inc., products are engineered and assembled in the USA
Page 4
Web:
www.maxbotix.com
PD11838n
XL-MaxSonar
®
- WR/WRC
™
Series
Sensor Comparison Chart
Part
Number
MB7051
MB7052
MB7060
MB7062
MB7066
MB7070
MB7072
MB7076
MB7092
AN
Voltage
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Serial
Data
(0 to Vcc level)
Pulse
Width
Yes
Yes
Yes
Yes
Yes
Analog
Envelope
Stability
Filter
Yes
Yes
Most
Likely
Filter
Yes
Yes
Refresh
Rate
5.1Hz
6.6Hz
10Hz
Other
Packages
Available
1
7 meter
range
10 meter
range
Yes
RS232
RS232
RS232
RS232
RS232
RS232
RS232
RS232
RS232
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
10Hz
10Hz
Yes
Yes
Yes
Yes
Yes
Yes
Yes
10Hz
10Hz
10Hz
10Hz
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Notes:1 Alternative package types have a maximum effective detection range of 645cm, the sensor will still report 765 as
a “no detection” output if a target is not found
_______________________________________________________________________________________________________________________________________
About Package Types
The XL-MaxSonar-WR sensor line is available in a variety of packages for applications with specific mounting
Package Types Currently Available
Full Horn — 3/4” NPT straight; back mounted thread (best performance)
Compact — 3/4” NPT straight; back mounted thread
Ultra-Compact — PCB with 4 moun ng holes
1”NPS — External thread over full sensor body (1”NPS)
1” BSPP — External thread over full sensor body (1”BSPP)
30mm1.5 — External thread over full sensor body (30mm1.5)
MB7051— Full Horn with a horn extension (Not pictured)
All package types have exposed PCB on user end for easy connec on.
Users desiring a fully enclosed assembly may purchase the “Shielded
Cable Op on” along with their sensor.
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.
_______________________________________________________________________________________________________________________________________
Performance Changes when Selecting a Non-Full Horn Package
When selecting a XL-MaxSonar-WR without the full horn the sensor will experience the following performance changes:
•
The sensor will have a wider beam shape for the first meter.
•
The sensor may have a dead zone from 0-6cm.
•
The sensor may be less accurate by an additional +/- 0.5%.
•
The sensor may have worse performance to small or soft targets.
•
The sensor may experience decreased noise immunity when ranging to small, soft, angled, or distant targets.
•
The maximum effective detection range is to 645cm, the sensor will still report 765 as a “no detection” output if a
target is not found.
MaxBotix
®
Inc.
Copyright 2005 - 2017 MaxBotix Incorporated
Patent 7,679,996
MaxBotix Inc., products are engineered and assembled in the USA
Page 5
Web:
www.maxbotix.com
PD11838n
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