Rephrase all of this! a commonly used sensor is the electromechanical "gas dampened ball and tube" design. the sensor is nothing more than a small tube with a switch at one end and a gold plated steel ball at the other, held in place by a small magnet. when the sensor receives a hard enough jolt to knock the ball loose from the magnet, the ball rolls down the tube, hits the switch and closes the circuit. the tube is slanted upward so the ball should return to its original position after an impact.

A sensor that is commonly used is the electromechanical design of a "gas dampened tube and ball." It is a sensor with nothing else but a tube that is small with  a small switch at one of the ends and a steel ball that is gold at the other end. Its all held together by a magnet. If and when it receives a jolt that is hard enough, it can knock the magnet and loosen the ball and makes it roll down the tube and hit the switch to close the circuit. It will return to its original place because of the slanted design of the tube. 

//I HOPE THIS HELPS YOU! :D

The electeromechnical "gas dampened ball and tube" design is a commonly used sensor. This sensor is simply composed of a small tube with a switch on one end and a gold plated steel ball on the other end the items on both end are held in place by a small magnet. When a hard enough jolt is received to knock the ball loose from the magnet, the ball rolls down the tube and hits the switch which closes the circuit. After the circuit is completed the ball should return to its original position after a impact because of the tubes upward slanted position.

Hope this helps!!

He feels that he way because