What are the Advantages and Disadvantages of a Hot-Wire Sensor?

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Advantages of a Hot-Wire Sensor:

Some of the advantages of a hot-wire MAF compared to the older style vane meter are:

  1. Responds very quickly to changes in airflow
  2. Low airflow restriction
  3. Smaller overall package
  4. Less sensitive to mounting location and orientation
  5. No moving parts improve its durability
  6. Less expensive
  7. Separate temperature and pressure sensors don’t seem to be required to see the atmospheric state, although the intake air temperature sensor continues to be sometimes included inside the MAF assembly.


Disadvantages of a Hot-Wire Sensor:

There are some drawbacks:

  1. Dirt and oil can contaminate the hot-wire deteriorating its accuracy
  2. Installation requires a streamlined flow across the hot-wire
  3. The sensor contains a skinny platinum wire, which may break if handled incorrectly

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