Figure 4: important for exhaust control, MAF sensors have
become a topic of interest only recently.
Figure 5: TMAP sensors are exposed to the most severe
sensors, which measure the pressure and the intake
temperature and can use this data to determine air mass.
In order to protect sensors, extremely reliable epoxy
resins are used that pass all the typical automotive tests.
They are resistant to oil, gas, and braking fluid and can
survive in a temperature range of -40 °C to +155 °C.
Even when stored at these temperatures, the encapsulant
on the sensor does not display any stress cracks. There is
also no interaction between the transmission oil and the
As evident by the above mentioned examples, the
optimum adhesive depends very heavily on the thermal,
mechanical, and chemical requirements of the sensor.
There are also appropriate adhesives and encapsulants for
the high-reliability sector that enable durable functionality
under the most severe environmental conditions. ECN
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