How to fit a hall effect proximity switch to pick up the state of the seatbelt buckle. The part I want to use the the Hamlin 55110 but a general expert/professional recommendation is most welcome.

Base on the package shown on HERE and PDF.your only option is service mount the FET on the smooth end of the latch/buckle.

The "center of sensitivity" is on the apex on this sensor.

Can you magnetize the male end of the seat belt tab to trigger the HET?

You should call Hamlin for few engineering samples of different LOW PROFIT HET packages.

Hamlin USA Tel: +1 920 648 3000 • Fax: +1 920 648 3001 • Email: [email protected]

Hamlin UK Tel: +44 (0)1379 649700 • Fax: +44 (0)1379 649702 • Email: [email protected]

Hamlin Germany Tel: +49 (0) 6142 923920 • Fax: +49 (0) 6142 923921 • Email: [email protected]

Hamectrol France Tel: +33 (0) 1 4687 0202 • Fax: +33 (0) 1 4686 6786 • Email: [email protected]

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Can you give me the objective of this project?


Can a weight sensor under the seat (use in ABS system) work on you project?


Can a mic listen for the click tone and "reference it" work well on you project?

Knock lock video HERE
I'm not the maker of this video.


Post more information and I will follow up.