What is the difference between flush and non flush mountable sensor ?

The difference between flush and non flush mountable sensor is as below :

Flush-style sensors actually have a shield that restricts the magnetic field so that it only radiates out of the face of the sensor. ... Non-flush, or unshielded sensors, do not have the shield around the end of the sensor so the field can radiate from the face to the sides of the sensor in a larger pattern.

Released for:Schneider Electric South Africa