At their core, metal detectors employ the principle of transmitting an electromagnetic field into the ground and subsequently analyzing the returned signal. This electromagnetic field, created by the detector, triggers electrical current loops, known as eddy currents, within conductive materials - predominantly, metals. Notably, these eddy currents form their electromagnetic fields, which get detected and analyzed by the metal detector. Taking this process a notch higher, gold detectors measure both inductance and conductivity. To clarify, inductance outlines the number of eddy currents created in the target, whereas conductivity touches on the ease with which such currents travel. By determining the magnitude of the eddy currents and their speed, a metal detector effectively works for gold by computing the "time constant" of a prospect.

These time constants could significantly vary depending on the targets. To illustrate, small pieces of aluminium foil exhibit brief time constants, gold coins, and ornaments present longer time constants, whereas scraps of steel, iron, and other ferrous metals show even more extended time constants. Having a comprehensive understanding of how a metal detector works for gold allows for specific calibration to search for targets falling within this "middle" range. However, it's essential to note that it may not always yield perfect results. Factors like the size, shape, and distance of a target, along with other environmental variables, can impinge on the precision of the detector's time-constant computation. To offset this, The gold detector can be re-calibrated in real-time to delve into either broader or narrower ranges of time constants.

BR 100 Pro, a distinguished long-range detector, has been the top choice for gold and precious metal prospectors around the world for the past five years, thanks to its exceptional efficiency and versatility in detecting valuable underground treasures. We are proud to introduce our latest breakthrough, an advanced model that incorporates state-of-the-art technology and improvements from our research labs. This innovation has already enabled a lot of prospectors worldwide to achieve their targets.

BR SYSTEMS takes pride in BR 100 Pro as the zenith of professional detection devices. It has been carefully engineered and manufactured to be the foremost option for both hobbyists and experts in their pursuit of uncovering hidden riches. This device boasts a sophisticated intelligent calibration system that can identify the type of search area, ensuring it operates effectively across different terrains and delivers precise results. BR100 PRO is designed with a modern and efficient mechanical structure, offering a compact form that promotes user mobility and productivity during search missions.

It is equipped with a comprehensive array of detection components and accessories, all conveniently organized in a compact, transportable bag that is ideal for quick detection and exploration activities. Ease of use is paramount for the effectiveness of a detector, and the BR100 PRO is crafted for ease, making it accessible for users of all skill levels to operate without difficulty. This device is also adaptable, allowing for smooth management of its various systems. At BR Systems, we have dedicated years to meticulously researching and testing the signals that the BR100 PRO emits and receives. Our approach is rooted in both scientific study and empirical field trials.