SMD SOT89 marking code N130

[dexter_04]

Hi everybody,

Happy new year for 2024 !

A friend gave me a flow sensor from a water softener.

For the moment, I didn't success to identify the component on the sensor. I think it's a hall effect sensor, but even with the marking code (N130 ?), I don't know which is the reference of this component.

If somebody has some ideas, I'll be very happy.

Thank you

 

[FvM]

Hall sensor sounds reasonable. But I would look at the correponding sensor hardware to understand sensor operation principle.

 

[dexter_04]

Thank you for your reply.

From what I understood, there is a little magnet on a turbine. With the flow of water, when the turbine turns, the magnet passes in front of the sensor.

With that principle, the flow can be measured.

 

[FvM]

Magnet sensors in SOT89 are made by Honeywell, TDK and previously by Allegro (now obsolete). You can use e.g. Digikey parametric search to locat e some devices.

https://www.digikey.com/en/products/filter/switches-solid-state/565

Marking codes are manufacturer specific and not easily to find.