Add additional chemical resistance to your outdoor sensor
- MB7950 Mounting Hardware
Mounting Hardware for our outdoor sensors
- MB7360 HRXL-MaxSonar-WR
Our high resolution outdoor ultrasonic sensor
- MB7092 XL-MaxSonar-WRA1
Our advanced outdoor ultrasonic sensor
- MB7954 Shielded Cable
Provide stable power to your sensor
- MB7067 XL-MaxSonar-WRC1
A compact version of our most popular outdoor ultrasonic sensor
- MB1220 XL-MaxSonar-EZ2
Our best indoor ultrasonic range finder
HRXL‑MaxSonar®‑WRS™ Sensor Line
Our industrial outdoor high performance ultrasonic precision rangefinders
The industrial high resolution outdoor HRXL-MaxSonar-WRS sensors have a robust PVC housing designed to meet IP67 water intrusion. Theses sensors provide reliable measurements for snow depth and liquid level applications. The HRXL-MaxSonar-WRS outdoor ultrasonic sensors have high power output, noise rejection, auto calibration, temperature compensation, and factory calibrated beam patterns. Users should select a sensor with their outputs of choice and that matches their application. Models are available with the following outputs: pulse width, analog voltage output, RS232 Serial output (select models) or TTL Serial output (select models).
Selecting a Product
The HRXL-MaxSonar-WRS Sensors At a Glance
Different applications require different sensors. The HRXL‑MaxSonar‑WRS series of outdoor sensors offer a variety of features allowing users to select the best sensor to meet their needs.
The table above shows features that exist in each of the products. To view how each sensor will function to different sized targets reference the HRXL‑MaxSonar‑WRS Beam Patterns.
HRXL‑MaxSonar‑WRS Sensor Differences
MB7334 and MB7344
These sensors have a filter that will reset when targets are considered outside of a 2% distance window. This makes the sensor an ideal balance for accurately monitoring slow or stationary targets that occasionally move rapidly such as water tanks.
MB7354 and MB7374
These sensors have a rate limiting filter that allows for a maximum change of 7mm per second. This improves the sensor’s accuracy and stability by reducing the influence of interference caused by wind, acoustic noise, thermal changes, and other effects. This makes the sensor ideal for snow depth measurement even in environments with blizzard conditions.
MB7364 and MB7384
These sensors are the base model in the HRXL-MaxSonar-WRS sensor series. These sensors will update all outputs in real-time as the target’s distance changes.
For further help in selecting a sensor use our Ultrasonic Sensor Selection Guide
Detailed product information is available in the product datasheets
Sensor Line Specifications
- Resolution of 1-mm
- 6Hz read rate
- Internal temperature compensation
- 42kHz ultrasonic sensor measures distance to objects
- RoHS Compliant
- Read from all 3 sensor outputs: Analog Voltage, Serial, Pulse Width
- Virtually no sensor dead zone, objects closer than 50cm range as 50cm
- Maximum Range of 5-meters (196 inches)
- Operates from 2.7-5.5V
- Low 3.1mA average current requirement
- Small, light weight module
- Designed for easy integration into your project or product
- Operational temperature -40°C to +65°C (-40°F to +149°F)
- Realtime automatic calibration (voltage, humidity, and ambient noise)
- Firmware filtering for excellent noise tolerance and clutter rejection
- Weather resistant (IP67), optional chemical resistant F-Option
- Matches standard electrical 3/4-inch PVC pipe fittings for easy mounting (3/4-inch National Pipe Thread Straight)
- Long narrow detection zone
Volume Pricing (100 or more units): Contact MaxBotix Inc.
Weather Resistant (IP67) Sensors, and Optional Chemical Resistance
The industrial outdoor HRXL-MaxSonar-WR sensors have a robust PVC housing designed to meet IP67 water intrusion. The sensors provide short to long distance detection and ranging with a narrow beam pattern. The HRXL‑MaxSonar‑WR outdoor ultrasonic sensors have high power output, noise rejection, auto calibration, and factory calibrated beam patterns. Users should select a sensor with their outputs of choice and reading filtering that matches their application. Models are available with analog voltage output, pulse width output, & serial digital output (RS232 or TTL).
In addition to the standard HRXL-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.
Standard Weather Resistant Models
The exposed materials of a properly mounted HRXL-MaxSonar-WR sensor are: Aluminum (oxidized surface), PVC, & silicone rubber (VMQ).
The exposed materials of a properly mounted HRXL-MaxSonar-WR sensor with the F-Option added are: Aluminum (oxidized surface), PVC, & Flourosilicone (with an additional back up FEP Teflon® seal).
To ensure long term operation of the sensor, terminal connections should not be exposed to water, dust, or other chemicals. Follow proper mounting when installing your sensor. This is easily accomplished using standard PVC pipe fittings which match the provided mounting threads (3/4" National Pipe Thread Straight) MB7950 Mounting hardware can be purchased along with your sensor.
Sensors are designed for operation in air, but may work well in many gases. Testing for proper operation is encouraged. Compensation for speed of sound changes in other gases should be applied to sensor output, this is often accomplished through a simple 2 point linear calibration.
The industrial HRXL‑MaxSonar‑WR products are the highest quality for cost outdoor ultrasonic sensors on the market. They provide an industrial component module solution that offers easy to use outputs, weather & dust resistance, no sensor dead zone, calibrated narrow beam patterns, stable range readings, low power demands, and a host of other features detailed in the product datasheets.
The HRXL-MaxSonar-WR sensors represent an industry revolution that has already found use in a number of advanced or industrial solutions where ultrasonic sensors have not been historically considered a viable solution due to unstable readings, high cost, and high power requirements.
The Noise Filtering
The sensor dynamically adjusts its sensitivity to compensate for outside electrical & acoustic noise sources.
Internal Temperature Compensation
The speed of sound in air increases about 0.6 meters per second, per degree centigrade. Because of this, each HRXL‑MaxSonar‑WR is equipped with an internal temperature sensor which allows the sensor to apply a compensation for speed of sound changes.
With the internal temperature sensor, range readings immediately (within twenty seconds) after power up are the most accurate, and this is ideal for battery applications where the sensor is powered off most of the time. The self heating (15mW at 5V, or 8mW at 3.3V) will change the temperature of the sensor by 3 degrees C or so. (The amount of self heating is also slightly dependent upon user mounting). As such, self heating will cause the sensor to read the actual air temperature inaccurately.
External Temperature Sensor
With the HR‑MaxTemp connected to the HRXL‑MaxSonar‑WR line of sensors, realtime automatic temperature compensation is available. The HR-MaxTemp allows the HRXL‑MaxSonar‑WR sensor to monitor the changes to air temperature while ignoring self-heating.
The HRXL‑MaxSonar‑WR is designed to used alongside the HR‑MaxTemp temperature sensor. On power-up the HRXL‑MaxSonar‑WR will automatically detect an attached temperature sensor and begin to apply temperature compensation for the speed of sound changes to all range outputs.
The HRXL‑MaxSonar‑WR interface was designed to be very easy and intuitive to use. The interface output formats included are pulse width output, analog voltage output, and RS232 or TTL serial output. All interfaces work without user code or complicated setup strings.
The Power Requirements
The HRXL‑MaxSonar‑WR functions throughout a 2.7V to 5.5V operational voltage range. This allows for easy integration at either 3.3V or 5V and means that users of low voltage microcontrollers, or those who wish to operate in solar or battery based systems do not have to provide an extra power supply for the sensor.
The HRXL‑MaxSonar‑WR sensors have a 3.1mA average current draw during free ranging operation.
The Controlled Narrow Beam Shape
Similar ultrasonic products may have frequent side lobe detection and can even falsely trigger on objects behind or to the sides of the sensor. The HRXL‑MaxSonar‑WR offers a controlled narrow beam that is designed to reject small objects (clutter) outside of the central beam area and provides long range sensitivity without detecting frivolous or unwanted targets.
Each HRXL‑MaxSonar‑WR is made and tested for proper operation at our facility in the USA and comes with a factory calibrated narrow beam pattern to help ensure consistent operation of the sensor even from part to part.
The HRXL‑MaxSonar‑WR automatically calibrates to its environment before every range reading. This calibration includes compensation for temperature, voltage, humidity, acoustic noise, and electrical noise conditions.
This sensor is designed to be sold in volume. As a result, our customers benefit from our large production volumes and distributed engineering expenses.
Reference the product datasheets to get detailed information on how each sensor operates.
|Sensor Selection Guide||Sensor Selection Guide|
|Snow Sensor Mounting||Recommended mounting guide|
|HRWR Chaining Notes||HRXL-MaxSonar-WRS Chaining|
|RoHS Conformity||RoHS Declaration of Conformity|
|CE Declaration of Conformity||CE Declaration of Conformity|
|Reliability Demonstration||MTBF Report|
|Quick Start Guide||MaxSonar Quick Start Guide|
|High Resolution Pictures||High Resolution Pictures.zip|
Product 3D Models
Full Horn Housing
|Key Shot||IGES File||ACIS 7.0 File||Solid Works Part|
|STL File||STEP File||ParaSolid Part|