There are two types of Hall sensors, two wire & three wire, the three wire versions are intended to switch a load, The two wire are intended for higher impendence sensing, IOW the pair carry the supply as well as indicate the status of the device.
e.g. input into a PLC or Microchip for instance.

The fact is that both kinds of those sensors require constant power to function, no matter how it is supplied.And for a battery powered remote sensor part of a home security system, battery life matters.

 

For starters, a hall sensor must have a power source

My question was directed to the TS, so why are you responding to that (and you didn't answer my question anyway)?

 

I don't understand your garage door example of why you think a Hall sensor can't do everything that a reed switch can do(?).
A Hall sensor can be just as sensitive to magnetic fields as a reed switch.

Hey,

I said that refering to overhead door as they have to much play in them for the gap of the sensor I posted pic of as an example.
What I currently use was large door contact and magnet that has a much better gap range so if door shifts it wont trigger until door is really opened.

Thanks
Fred

 

I took another look at the PCB photo in post #2, and a reasonable guess is that a hall effect sensor is used, I see one mounted in position H1 in the photo.

 

I took another look at the PCB photo in post #2, and a reasonable guess is that a hall effect sensor is used, I see one mounted in position H1 in the photo.

Yeah, that was established in the first 4 post.

 

Hey,

I said that refering to overhead door as they have to much play in them for the gap of the sensor I posted pic of as an example.
What I currently use was large door contact and magnet that has a much better gap range so if door shifts it wont trigger until door is really opened.

Thanks
Fred

The IoT sensor I use on our garage door relies on a tilt switch. It is mounted to the door vertically and when the door is raised it becomes horizontal as the part of the door it is on becomes parallel to the ceiling.

It uses a Zigbee radio and the Z-Wave protocol. It is powered by a single 123A lithium primary cell which lasts for years. It is 100% reliable and almost completely identical to common wireless alarm sensors used in the same application. The difference is the radio and protocol used.

It also includes a tamper switch and a set of terminals for dry contacts, such as a reed switch if you really need one.

 

Hey,

I said that refering to overhead door as they have to much play in them for the gap of the sensor I posted pic of as an example.
What I currently use was large door contact and magnet that has a much better gap range so if door shifts it wont trigger until door is really opened.

Thanks
Fred

Actually, the gap that can be spanned by the Hall effect sensor is limited only by the magnet used to activate it. A Hall effect sensor is much more sensitive than a reed switch, and it can be replaced though board level repair is not exactly a commonplace for items like that.