Data Sheet

MaxBotix
®
Inc.
Copyright 2005 - 2015 MaxBotix Incorporated
Patent 7,679,996
XL-MaxSonar
®
- EZ/AE™ Series
Page 3
Web: www.maxbotix.com
PD11840g
MaxBotix Inc., products are engineered and assembled in the USA.
Sensor Minimum Distance
The sensor minimum reported distance is 20cm
1
(7.87 inches). However, the XL-MaxSonar-EZ will range and report
targets to the front sensor face. Large targets closer than 20cm
1
will typically range as 20cm
1
.
Sensor Operation from 6-inches to 20-inches
Because of acoustic phase effects in the near field, objects between 20cm and 50cm may experience acoustic phase
cancellation of the returning waveform resulting in inaccuracies. These effects become less prevalent as the target distance
increases, and has not been observed past 50cm. For this reason, industrial users that require the highest sensor accuracy
are encouraged to mount the XL-MaxSonar-EZ from objects that are farther than 50cm.
Range “0” Location
The XL-MaxSonar-EZ reports the range to distant targets starting from the front of the sensor as shown in the diagram
below.
In general, the XL-MaxSonar-EZ will report the range to the leading edge of the closest detectable object. Target
detection has been characterized in the sensor beam patterns.
____________________________________________________________________________________________________________________________________
Mechanical Dimensions
____________________________________________________________________________________________________________________________________
Real-Time Auto Calibration
Each time before the XL-MaxSonar sensor takes a range reading it calibrates itself. The sensor then uses this data to
range to objects. If the temperature, humidity, or applied voltage changes during operation, the sensor will continue to
function normally. The sensor does not apply compensation for the speed of sound change versus temperature to any
range readings.
Temperature Compensation
The speed of sound in air increases about 0.6 meters per second, per degree centigrade. The XL-MaxSonar-EZ sensors are
not equipped with an internal temperature compensation. If temperature compensation is desired, contact MaxBotix and
request the temperature compensation formula PDF. This will allow users to compensation for speed of sound changes.
The range is measured from front of the sensor
Range Zero
Target Face