HRXL-MaxSonar - WR/WRC Series HRXL-MaxSonar - WR Series High Resolution, Precision, IP67 Weather Resistant, Ultrasonic Range Finder MB7360, MB7363, MB7366, MB7367, MB7368, MB7369, MB7375 8 MB7380, MB7383, MB7386, MB7387, MB7388, MB7389, MB7395 The HRXL-MaxSonar-WR sensor line is a cost-effective solution for applications requiring precision range-finding, low-voltage operation, space saving, low-cost, and IP67 rating for weather resistance. The HRXL-MaxSonar-WR sensor line provides high accuracy and high resolution ultrasonic proximity detection and ranging in air. This sensor line features 1-mm resolution, target-size and operating-voltage compensation for improved accuracy, superior rejection of outside noise sources, internal speed-of-sound temperature compensation and optional external speed-of-sound temperature compensation. The HRXL-MaxSonar-WR/WRC models are available in 1.5-meter, 5-meter, or 10-meter models. This ultrasonic sensor detects objects from 1-mm and ranges to objects from 30-cm* to maximum range. Objects closer than 30-cm* are typically reported as 30-cm*. The interface output formats are pulse width, analog voltage, and digital serial in either RS232 (MB736X/MB7375) or TTL (MB738X/MB7395). Factory calibration is standard. *For select sensors this distance is 50-cm, refer to pages 4 and 5. Low current draw reduces current People detection Precision Ultrasonic Range Robot ranging sensor drain for battery operation Sensing Long range object detection Very low-power rangerfinder, Range-finding at a fraction of the Environments with acoustic and excellent for multiple sensor or cost of other precision rangefinders electrical noise battery based systems Reading-to-reading stability of 1 Height monitors 1-mm at 1-meter is typical Easy to Use Component Auto sizing Accuracy is factory-matched Module Box dimensions providing a typical accuracy of 1% Gracefully handles other ultrasonic 1,2 Automated factory systems or better 5 sensors Notes: Internal temperature compensation is 1 Stable and reliable range readings Refer to section that compares WR to alternative standard and optional external housings on page 4 and excellent noise rejection make 2 Users are encouraged to evaluate the sensor performance temperature compensation the sensor easy to use for most users in their application 3 Determines range to largest object Reference pages 9-10 for part specific timing information Easy to use interface with distance 4 (MB7368, MB7369, MB7388, MB7389) by design 5 provided in a variety of outputs See page 7 for multi-sensor operation Determines range to first detectable 6 F-Option provides additional protection from hazardous Target size compensation provides object (MB7360, MB7363, MB7366, MB7367, chemical environments 7 greater consistency and accuracy Please reference page 11 & 12 for minimum operating MB7375, MB7380, MB7383, MB7386, MB7387, voltage verses temperature information MB7395) Sensor automatically handles 8 Please reference page 24 for part number key 2,4 Excellent clutter rejection acoustic noise Additional chemical resistance Calibrated sensor eliminates most 6 available sensor to sensor variations Very Low Power Applications & Uses Requirements Tank level measurement Fast first reading after power-up (MB7369 or MB7389) eases battery requirements Weather station monitoring Wide, low supply voltage of 2.7V to Bin level measurement 5.5V requirements eases battery Proximity zone detection powered design Close Range Operation Applications requiring 100% reading-to-reading reliability should not use MaxSonar sensors at a distance closer than 50- cm. Although most users find MaxSonar sensors to work reliably from 0 to 50-cm 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. Page 1 MaxBotix Inc., products are engineered and assembled in the USA. MaxBotix Inc. Web: www.maxbotix.com Copyright 2005 - 2021 MaxBotix Incorporated PD11500ab Patent 7,679,996 HRXL-MaxSonar - WR/WRC Series Triggered operation yields real-time Range Outputs General Characteristics range data Pulse width, 1uS/mm resolution Low cost ultrasonic rangefinder Free run operation with superior Analog Voltage, 5-mm resolution 3 Detection out to 1.5-meters, noise rejection (5-meter sensors) 5-meters, or 10-meters Operating temperature range 7 Analog Voltage, 10-mm resolution Resolution of 1-mm from -40C to +65C 7 (1.5 and 10-meter sensors) Distance sensor from 30-cm to 1.5- Operating voltage of 2.7V to 5.5V Serial, 1-mm resolution meters, 30-cm to 5-meters, or 50- Nominal current draw of 2.3mA Available in RS232 (MB736X and cm to 10-meters based on model (peak ~49mA) at 3.3V, and 3.1mA 2 MB7375) or TTL (MB738X and Excellent Mean Time Between (peak ~98mA) at 5V MB7395) Failure (MTBF) IP67 Rated HRXL-MaxSonar-WR Pin Out Pin 1- Temperature Sensor Connection: Leave this pin unconnected if an external temperature sensor is not used. For best accuracy, this pin is optionally connected to the HR-MaxTemp temperature sensor. Some additional information for the temperature sensor can be found on page 10 of the datasheet. Pin 2- Pulse Width Output: This pin outputs a pulse width representation of the distance with a scale factor of 1uS per mm. The pulse width output is sent with a value within 0.5% of the serial output. Pin 3- Analog Voltage Output: This pin outputs a single ended analog voltage scaled representation of the distance. This output is referenced to the sensor ground and Vcc. After the ~50mS power up initialization, the voltage on this pin is set to a low voltage. Once the sensor has completed a range reading the voltage on this pin is set to the voltage corresponding to the latest measured distance. The 5-meter sensors (MB7360, MB7369, MB7380 and MB7389) use a scale factor of (Vcc/5120) per 1-mm. The distance is output with a 5- mm resolution. The analog voltage output is typically within 5-mm of the serial output. The 1.5-meter sensors (MB7375 and MB7395) and 10-meter sensors (MB7363, MB7366, MB7368, MB7383, MB7386, and MB7388) use a scale factor of (Vcc/10240) per 1-mm. The distance is output with a 10-mm resolution. The analog voltage output is typically within 10-mm of the serial output. Using a 10-bit analog to digital converter with the 5-meter sensors, one can read the analog voltage counts (i.e. 0 to 1023) directly and just multiply the number of counts in the value by 5 to yield the range in mm. For example, a converted value of 60 corresponds to 300-mm (where 60 x 5 = 300), and 1000 counts corresponds to 5,000-mm (where 1000 x 5 = 5,000-mm). Using a 10-bit analog to digital converter with the 10-meter sensors, one can read the analog voltage counts (i.e. 0 to 1023) directly and just multiply the number of counts in the value by 10 to yield the range in mm. For example, 30 counts corresponds to 300-mm (where 30 x 10 = 300), and 1000 counts corresponds to 10,000-mm (where 1000 x 10 = 10,000-mm). Pin 4- Ranging Start/Stop: This pin is internally pulled high. If this pin is left unconnected or held high, the sensor will continually measure and output the range data. If held low, the HRXL-MaxSonar-WR will stop ranging. Bring high for 20uS or longer to command a range reading. Filtered Range Data: When pin 4 is left high on the sensors, the sensors will continue to range. The data that is output includes a filter for increased accuracy. The sensors will output the range based on recent range information. The filter does not affect the speed at which data is made available to the user but instead allows for more consistent range information to be presented. For sensor specific timing and filter information refer to pages 8 and 9. Real-time Range Data: When pin 4 is low and then brought high, the sensor will operate in real time and the first reading output will be the range measured from this first commanded range reading. When the sensor tracks that the RX pin is low after each range reading, and then the RX pin is brought high, unfiltered real time range information can be obtained. For timing information please refer to pages 8 and 9. Pin 5-Serial Output: The MB736X/MB7375 sensors have an RS232 data format (with 0V to Vcc levels) and the MB738X/MB7395 sensors have a TTL outputs. The output is an ASCII capital R, followed by four ASCII character digits representing the range in millimeters, followed by a carriage return (ASCII 13). The maximum range reported is 4999 mm (5-meter models) or 9998 mm (10-meter models). A range value of 5000 or 9999 corresponds to no target being detected in the field of view. The serial data format is 9600 baud, 8 data bits, no parity, with one stop bit (9600-8-N-1). Because the data is presented in a binary data format, the serial output is most accurate . V+ Pin 6 - Positive Power, Vcc: The sensor operates on voltages from 2.7V - 5.5V DC. For best operation, the sensor requires that the DC power be free from electrical noise. (For installations with known dirty electrical power, a 100uF capacitor and 10ohm resistor placed at the sensor pins between V+ and GND will typically correct the electrical noise.) Please reference page 10 & 11 for minimum operating voltage verses temperature information. GND Pin 7 Sensor ground pin: DC return, and circuit common ground. Page 2 MaxBotix Inc., products are engineered and assembled in the USA. MaxBotix Inc. Web: www.maxbotix.com Copyright 2005 - 2021 MaxBotix Incorporated PD11500ab Patent 7,679,996