Electrical and electronic

Understanding the difference between dBm and dB helps ensure optical measurement data is interpreted consistently and prevents incorrect conclusions during system acceptance testing or maintenance.

Optical power meter used together optical light source, can be applied to determine optical fiber link attenuation — a parameter that reflects the overall quality of the fiber optic cabling system

An optical power meter is used to measure the power level of optical signals at a specific point along a fiber optic transmission line. When combined with an optical light source, the optical power meter can also be used to evaluate fiber link loss, verify installation quality, and support troubleshooting activities. With fast measurement capability, ease of use, and reasonable investment costs, optical power meters are widely applied in various fields related to optical transmission systems

Metal detectors operate on the principle of passive electromagnetic induction and can only detect isolated metal objects such as gold, copper, and iron. These devices cannot trace utility paths because they cannot differentiate the direction or depth of long, buried continuous pipes. For insulated electrical cables or plastic pipes, metal detectors are completely ineffective as there is no AC current to generate a magnetic field. Furthermore, the detection depth of standard consumer metal detectors is typically limited to 1 - 2 meters for small objects, whereas underground utility lines are often buried 3 - 5 meters deep or even more.

Two metal detectors may have fairly similar specifications, but their field results can differ significantly. Some devices operate stably on park ground, while others exhibit significant interference when moved to red basalt soil or coastal areas

Even with the same device and the same object, the detection results are not always the same. In some areas, the signal is clearly visible from a considerable distance, while in other areas, the probe must be brought close to the ground to receive a response.

Paint gloss meters are widely used in quality control departments, material testing laboratories, and paint production facilities. These instruments measure the amount of light reflected from a coated surface, helping manufacturers maintain consistency between production batches and meet appearance-related quality standards.

The 10 million VND price range is always among the most searched-for budgets when choosing to buy a metal detector. This is a reasonable investment to access branded equipment, while still being suitable for beginners or individual users

Gloss meters are widely used in metal fabrication, engineering plastics, industrial coatings, and many other surface-finishing applications. While all gloss measurements are based on the same principle of light reflection, the interpretation of results can vary significantly depending on the material being tested. Each material interacts with light differently due to its surface characteristics and manufacturing process. Understanding these differences is essential for selecting the appropriate measurement angle, obtaining reliable readings, and evaluating product quality accurately.

When discussing automation, electronics, or modern technological infrastructure, attention is often focused on controllers, sensors, or end devices. However, for these systems to operate stably over the long term, the power supply is always an inseparable part.