I am trying to make a reading sensor for a Maddalena SJ EVO diy water meter
According to the description, the counts can be read every 10 L. So I suspect that on the far left digital ring there is a permanent magnet (neodymium) which short-circuits the reed switch in the adaptor with each full revolution.
Despite the sensitive 7mm/1.8 reed switch, I have a problem with its placement. This is because it depends on the magnet itself. The maximum sensitivity does not have to be on axis and it also depends on whether it should be positioned transversely or longitudinally to the ring - and that depends on the permanent magnet itself.
Maybe some of you have worked through this subject, taken this water meter apart and have helpful knowledge on the subject.
I have the rest done on an ESP32c3 awakened by an edge from a reed switch. The data is sent to the cloud or by MQTT message.
Attached is the water meter and a reading attachment found on the web (passive)
.
.
.
According to the description, the counts can be read every 10 L. So I suspect that on the far left digital ring there is a permanent magnet (neodymium) which short-circuits the reed switch in the adaptor with each full revolution.
Despite the sensitive 7mm/1.8 reed switch, I have a problem with its placement. This is because it depends on the magnet itself. The maximum sensitivity does not have to be on axis and it also depends on whether it should be positioned transversely or longitudinally to the ring - and that depends on the permanent magnet itself.
Maybe some of you have worked through this subject, taken this water meter apart and have helpful knowledge on the subject.
I have the rest done on an ESP32c3 awakened by an edge from a reed switch. The data is sent to the cloud or by MQTT message.
Attached is the water meter and a reading attachment found on the web (passive)
.
.
.
