Battery-free TPMS
The latest vehicles use a TPMS system without any little batteries in the sensors - it relies on the centrifugal action for energy. Do any of the aftermarket TPMS systems for trailers use this tech...
Forum Discussion
Boon Docker wrote:Maybe I'm misunderstanding how these work, but it looks like the passive sensor "replies" to a "query" from an antenna. Without input from the antenna, there would be no action by the sensor. You may not need a battery in the sensor but there would have to be an antenna constantly querying the sensor. Or am I "unclear on the concept". :)ktmrfs wrote:
virtually ALL TPMS systems rely on tire rotation to wake up the system to conserve battery life. the ones inside the tire have a battery. I seriously doubt there are any that do not use a battery.
Even the external systems sense roation to wake up the system.
centrifical rotation by itself is not a way to generate power.
Yes there are batteryless TPMS sensors on the market that use "SAW" technology.
