Reed switch is an electronic switch that uses a reed switch as a contact. According to different classification criteria, reed switches can be classified into the following categories:

According to the number of contacts: single pole reed switch (only one contact) and double pole reed switch (two contacts).

According to the working mode: normally open type (contacts close when there is no magnetic field) and normally closed type (contacts open when there is no magnetic field).

According to application scenarios: universal reed switches (used for general switch control), magnetic reed switches (used for magnetic detection and sensing applications), etc.

These are the most common classification methods for reed switches, and the specific type can be selected according to specific application needs.