Omitec OmiDetect 100, User Manual

Page: 6 / 29

Introduction
4
Examples of TPM sensors used in today’s direct TPM systems.
Beru
Siemens
TRW Pacifica
Audi
Volkswagen
Bentley
Bugatti
BMW
Ferrari
Kia
Land Rover
Maserati
Mercedes-Benz
Porsche
Chrysler
Dodge
Jeep
Mazda
Suzuki
GM
Honda
Acura
Hyundai
Kia
Lexus
Toyota
About Sensors
TPM sensors are micromechanical devices (a silicon-based vacuum cell)
powered by a lithium battery with a minimum life expectancy of up to 10
years. Using their piezoresistive technology, they monitor tire pressure via
measuring the deformation of an internal diaphragm.
They typically transmit measurement values and sensor ID data at 433
MHz (for European systems) or 315 MHz (for U.S. systems) to the
receiver control unit once per hour when the vehicle is parked (and only if
the pressure changes), to preserve battery life, and every few seconds
when the vehicle is traveling above a certain speed (typically about 20
mph). If the tire pressure rises or falls outside calibration limits, a warning
light or message is displayed in real time on the vehicle’s instrument
panel, along with an audible warning, to alert the driver.