About Us At Petro Gold International LLC we have been following one goal for years: To supply the best Detectors for our customers all over the world. Petro Gold is based on proven technology which has already been tested and used successfully. Along with the help of our professional and amateur users, we tried to improve our products and developed all new technologies, such as static conductivity meter reading, based on the pulse induction principle, power MOSFET - Transmitters or special interference reduction circuits.