PNEUMATIC PRESSURE MONITORING UNIT FOR SPARE TIRE

摘要

PROBLEM TO BE SOLVED: To easily and surely grasp pneumatic pressure of a spare tire, and to reduce a total cost for a unit. SOLUTION: A transponder 1 provided with a pressure sensor for detecting pneumatic pressure, an integrated circuit containing a storage medium for storing a data of the pressure sensor with the lapse of time, and a battery for driving them is covered with a spherical shock-absorbing member 2 to be inserted into an air chamber A of a spare tire T, and the data accumulated in the storage medium responds to an interrogating wave from a tire outside.