TI CBR Motion Sensor
By Texas Instruments TI

Motion Sensor - Compatibility: - TI-73 Explorer - TI-82 Calculator - TI-83 Calculator - TI-83 Plus Calculator - TI-83 Plus Silver Edition Calculator - TI-84 Plus Calculator - TI-84 Plus Silver Edition Calculator - TI-85 Calculator - TI-86 Calculator - TI-89 Calculator - TI-89 Titanium Calculator ... 

Vernier Motion Detector
By Vernier Software

The MD-BTD Motion Sensor uses ultrasound to measure distance. Ultrasonic pulses are emitted by the Motion Detector, reflected from a target, and then detected by the device. The time it takes for the reflected pulses to return is used to calculate position, velocity, and acceleration. This allows you to study the motion of objects such as a person walking, a ball in free fall, or a cart on a ramp. ... 

Vernier Go! Motion Sensor
By Vernier Software

G0 Motion Sensor is our next-generation motion detector that connects directly to a computer's USB port - eliminating the need for an additional data-collection interface. ...