The Wireless Motion Detector W36 is a sonar device that emits ultrasonic pulses, which reflect off an object. The sensor measures the time it takes an ultrasonic pulse to travel from the sensor to the object and determines the distance from the object based on the measured time and the speed of sound. The minimum range of the sensor is 0.15 m and the maximum range is 6 m.

The sensor can be used wirelessly via Bluetooth or wired via USB. The sensor is equipped with an OLED color display which shows some sensor information and the measured by the sensor values. This makes the sensor suitable to use as an independent measuring instrument.

The sensor can be used wirelessly via Bluetooth or wired via USB with the Coach or Coach Lite programs/apps on computers (Windows and Mac), Chromebooks and mobile devices (Android and iOS).

Technical Specifications

• Measuring Range: 0.15 to 6 m
• Resolution: 0.001 m
• Aperture (top angle/2): 15˚ with respect to the central axis
• Ultrasound Frequency: 50 kHz
• Uncertainty: ± 1%
• Maximum Sampling Rate: 100 Hz
• Display: OLED 0.96\” (128*64 px)
• Battery: Li-Poly Rechargeable Battery (3,7 V 2000 mAh)
• Battery Life: Approximately 22 hours (after full charge)
• Connection: Bluetooth 5, Low Energy (Mac, Android, iOS) Bluetooth 2.1, Classic (Windows) or USB-C 2.0

All specifications of the sensor are described it its User guide.

Suggested Experiments

The Motion detector can be used for studying a variety of motions including:

• Walking toward and away from the sensor,
• Simple harmonic motion, such as a weight hanging on a spring,
• Newton’s laws of motion,
• Acceleration due to gravity – free fall, objects dropped or tossed upward,
• Motions of a dynamic cart.