Poor designed or inferior reversing sensors may result in one
or more these problems when detecting 11cm cylinder within the near zone (0-30cm):

1. Blind Detection: No audio warning singal is produced when it should be a near zone signal.

2. Jump Detection: Middle zone signal is produced when it should be a near Zone signal.

3. Irregular Detection: Erratic and unstable wrong zone signal.

4. Temperature Effect: False audio signal comes on in hot summer or cold winter.

5. Some poor quality reversing sensors have inherent noises when the power is on.

6. Hollow-style designed reversing sensors are easy to keep dust, water, snow and mud. Performances are affected.