How to select, distinguish, and connect signal connectorsOrdinary signal butterfly valves do not have waterproof function, and most of them are used indoors. Ordinary signal heads can be selected.

If you want to provide some protection for the signal cable, you can also use a signal cable with a protective sheath, but it won’t be very effective。

Since the shell is not waterproof, if strict requirements are placed on the waterproof oil, a waterproof and explosion-proof signal head would be required, which would naturally increase the price significantly.

The signal butterfly valve typically has three wires: a common wire (red), a normally open wire (blue), and a normally closed wire (green)

You can also use a multimeter to test in advance. When the valve is closed, red and green are conductive. When the valve is open, red and blue are in a conductive state.