Detecteur Bahr 3V Noir-Blanc

Directions for use: When you hold the positive (black) terminal of the hammer near a point with a negative charge, an inductive charge is created. 

The same applies to the negative pole (white) near a positively charged point. 

Points that trigger an RAC at the positive pole when the hammer approaches should be treated with a “Gold” needle to open them; points where the negative pole triggers an RAC should be treated with a “Classic” needle.