Electronics Engineering
The Difference Between

What are dry and wet contacts?

User Avatar
Wiki User
September 11, 2007 5:36AM

A dry contact is a contact that does not provide voltage. For instance, the push-to-talk switch of a microphone, which just closes a circuit without providing voltage.

A wet contact is a contact that will provide voltage when closed, like the switch on the wall that activates the 110 VAC outlet to turn a lamp on in a room.

/

+------o o---------(o)

|

+---------------------(o)

Dry contact

/

+------o o---------(o)

|

--+--

--- Wet contact

------

-+-

|

+---------------------(o)