The Texas Instruments (TI) Calculator-based Ranger (CBR) is a sonic motion detector that brings real-world data collection and analysis into the classroom. When used with a TI graphing calculator, students can collect, view, and analyse motion data without tedious measurements and manual plotting. CBR allows students to explore the mathematical and scientific relationships between distance, velocity, acceleration, and time using data collected from activities they perform. The sonic motion detector unit contains the RANGER software, which includes a customised program for each calculator, and transfers the appropriate program from the CBR to the calculator when they are connected.

This CBR is for use with the Texas Instruments TI-82, TI-83, TI-85/CBL, TI-86, and TI-92 graphing calculators.