Retired Product

This is a retired product. There is an updated version available: SEN-11724

Creative Commons images are CC BY 2.0

Description: Replacement:SEN-11724. The High-Resolution version of this sensor is now available so this one is being discontinued. This page is for reference only.

This is the new, weather resistant, field-hardened WR1 from Maxbotix. The WR1 uses a robust PVC housing, is designed to meet IP67 water intrusion, and matches standard electrical ¾" PVC pipe fittings. We are extremely pleased with the size, quality, and ease of use of this low voltage weather-resistant range finder. The serial interface is a bit odd (it’s RS232 instead of standard TTL), but the PWM and Analog interfaces will allow any micro to listen easily enough. The sensor provides very accurate readings of 0 to 254 inches (0 to 6.45m) in 1 inch increments with little or no dead zone!

Maxbotix is offering the EZ0, EZ1, EZ2, EZ3, and EZ4 with progressively narrower beam angles allowing the sensor to match the application. Please see beam width explanation below.

Control up to 10 sensors with only two pins! Checkout the Maxbotix FAQ listed below.

Detailed dimensional is found in the datasheet below.

Mounting hardware is found here.


  • 42kHz Ultrasonic sensor
  • Operates from 3-5.5V
  • Low 2.1mA supply current
  • 20Hz reading rate
  • RS232 Serial Output - 9600bps
  • Analog Output - (Vcc/512)/inch
  • PWM Output - 147uS/inch
  • Designed for outdoor applications


Checkout Mikey Sklar’s flame-based trampoline, the high-lighter, using the EZ1!

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Customer Comments

  • Confused here, above it’s stated that there’s no dead zone, but the datasheet says it’s 12". Anything less than 12" reads as 12". So which is it?

  • Has anyone tried using this or any of the other range finders as a depth finder? I’m working on an aquatic project, and I’d love to mate a short ranged depth finder with it.

  • I’d be very interested to know the temperature range of this module. The datasheet does not give a temp range.
    I’ve heard there might be problems in cold weather, but I’d like to use it outdoors.

  • I was wondering if anyone would know the total mass of this product with the IP67 housing? I found the mass of the sensor unit but not an overall mass. Thanks.

  • I like the led cube in the background of the video

  • The serial output is inverted TTL on the Maxbotix sensors. The datasheet for this model is no different. It states that you still need a level-shifter if you need RS232 levels.

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