How do I get the positive and negative terminals of this pH electrode?

[patuno]

Please I need to know how I can bring out or locate the positive and negative terminals of this electrode.

 

[davenn]

Please I need to know how I can bring out or locate the positive and negative terminals of this electrode.

what make and model is it ?
have you bothered to look for a datasheet ?
it's terminated with a BNC connector and convention says that the centre pin would be positive and the outer would be negative