There are a number of advantages and applicability to using a low-frequency metal detector to inspect larger metal foreign objects. Sensitivity of metal detectors at different frequencies to ambient noiseMetal detectors at different frequencies have better depth penetration and are better able to detect large metal objects buried at deeper locations, which is important for applications where deep locations need to be detected.
Larger metal objects absorb less electromagnetic waves, which makes low-frequency metal detectors more suitable for detecting such targets, while high-frequency metal detectors may face problems with electromagnetic wave absorption when dealing with large objects, resulting in a weakened signal.
Low-frequency metal detectors typically have less scattering and reflection of the signal when dealing with large targets, which helps to improve the clarity and stability of the signal and facilitate the accurate identification of metallic foreign objects.
Low-frequency metal detectors are often more suitable for applications where non-destructive testing is required, as they are able to penetrate non-metallic materials at a depth without damaging the object being measured.
However, it is also important to note that there may be some limitations to a low frequency metal detector, such as it may not be as sensitive and resolution as a high frequency metal detector, especially when detecting small metal contaminants, and a low frequency metal detector may be more susceptible to environmental factors such as soil composition, humidity, etc.
When selecting a metal detector, factors such as the size, depth, and environmental conditions of the object to be inspected need to be considered to determine whether the use of a low-frequency metal detector is the right choice, and in practice, on-site testing and adjustments are required to ensure that the metal detector will perform well in a given scenario.