Difference Between Very Low Frequency And Multi-Frequency Metal Detectors

By: | Updated: Jan-17, 2023
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Metal detectors are essential for treasure hunters, archaeologists, and security professionals. But with so many different types of metal detectors available today, it can take time to decide which is right for your particular needs. One key distinction among metal detector models is between very low frequency (VLF) and multi-frequency (MF) models. Understanding the differences between these two types of metal detectors can help you make a more informed decision when selecting a device that best suits your requirements.

Difference Between Very Low Frequency And Multi-Frequency Metal Detectors

Very Low-Frequency Overview

Low-frequency metal detectors are designed to detect non-ferrous metals, like gold and silver. They operate at a lower frequency than other metal detectors and use one single coil to produce an electromagnetic field in the ground below it. With this type of detector, you have more control over the sensitivity settings, so you can fine-tune it to meet your specific needs. However, VLF metal detectors are more vulnerable to interference from electrical devices and natural minerals in the ground, so they may only be suitable for some terrain and can have difficulty detecting large objects at greater depths.

Multi-Frequency Overview

Multi-frequency metal detectors are designed to detect ferrous and non-ferrous metals, making them more versatile than VLF models. These detectors operate at multiple frequencies simultaneously, allowing them to differentiate between different types of metals. Multi-frequency metal detectors are also less susceptible to interference from electrical devices and natural minerals in the ground so they can be used in a wider variety of terrain. However, they tend to be bulkier and more expensive than VLF models.

Difference Between Very Low Frequency And Multi-Frequency Metal Detectors

Regarding product effectiveness, VLF detectors offer more control over sensitivity settings. On the other hand, multi-frequency detectors are better at differentiating between different types of metals and can be used in a wider variety of terrain types. However, the product effect can interfere with a metal detector’s ability to detect metals, so it is essential to consider this when selecting a detector. Depending on your exact needs, either type of detector will serve you well — it’s just a matter of choosing the one that best fits your situation.

Key Differences

For basic hobbyists, understanding the difference between VLF and MF metal detectors can be the key to choosing the right tool for your needs. Below is a summary of the key differences between the two types of metal detectors:

1) The Type of Metals They Can Detect

Low-frequency metal detectors are designed to detect non-ferrous metals, like gold and silver. They operate at a lower frequency than other metal detectors and use one single coil to produce an electromagnetic field in the ground below it. With this type of detector, you have more control over the sensitivity settings, so you can fine-tune it to meet your specific needs.

Multi-frequency metal detectors are designed to detect ferrous and non-ferrous metals, making them more versatile than VLF models. These detectors operate at multiple frequencies simultaneously, allowing them to differentiate between different types of metals. Multi-frequency metal detectors are also less susceptible to interference from electrical devices and natural minerals in the ground so they can be used in a wider variety of terrain.

2) Ease of Use

Low-frequency metal detectors are generally easier to use than their multi-frequency counterparts as they have more control over the sensitivity settings. This makes them a great option for hobbyists who want less time learning how to operate their devices. VLF models are less susceptible to interference from electrical devices and natural minerals in the ground, making them ideal for detecting metals in areas with lots of interference or mineral deposits. However, these detectors need help with larger objects located at greater depths.

Multi-frequency metal detectors are slightly more complicated than VLF models but still relatively easy for beginners to use effectively. These types of devices typically come with multiple frequencies, which can be adjusted according to your needs and preferences. This allows you to detect ferrous and non-ferrous metals with greater accuracy than VLF detectors. Additionally, multi-frequency detectors are more resistant to interference and can be used in various terrains. However, they tend to be bulkier and more expensive than VLF models.

3) Price

Low-frequency metal detectors are typically the more affordable option, ranging from $100 to $500. This makes them ideal for hobbyists who want to invest less money into a metal detector.

Multi-frequency detectors are generally more expensive than VLF models and can cost anywhere from $500 to $1,000. This puts them out of reach for many hobbyists and is something to consider before investing in a multi-frequency detector.

4) Weight

When it comes to weight, both VLF and MF metal detectors have their advantages and disadvantages. On the one hand, VLF models tend to be lighter in weight as they typically use a single coil for producing an electromagnetic field. This makes them easier to carry around and less fatiguing for long periods. However, because these types of detectors are limited in their frequency range, they may need more sensitivity settings to detect metals at greater depths or larger objects requiring more sensitivity settings.

On the other hand, multi-frequency metal detectors are usually heavier than VLF models due to the multiple coils used for generating various frequencies simultaneously. While this makes them bulkier and more difficult to transport from place to place, it also allows them to penetrate deeper into the ground, enabling you to locate bigger objects with greater accuracy.

5) The frequency

Very low-frequency metal detectors typically operate at a frequency range of 3 kHz and below. This type of detector is best suited for finding smaller objects near the surface but may need help to detect large, deep-lying objects.

Multi-frequency metal detectors generally operate in the 10 kHz to 100 kHz range and are better equipped for finding large objects and objects located at greater depths. They are also less susceptible to interference from other electrical devices and natural minerals in the ground, allowing you to hunt in more challenging terrain.

When it comes to metal detecting, understanding the differences between low-frequency and multi-frequency detectors can help you decide which type of device best suits your needs. VLF metal detectors are great for casual hobbyists just starting, while multi-frequency models are ideal for experienced users who want more control over the settings and greater detection capabilities. Ultimately, choosing the right metal detector comes down to personal preference, so research before purchasing

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