Metal Detector vs Magnetometer: Which Tool Do You Need? (October 2026)

On this page (7 sections)

1. Metal detector vs magnetometer: what does each tool do?
2. Is a metal detector a magnetometer?
3. What materials can each tool detect?
4. How do their search methods compare?
5. What should you check before choosing?
6. What do the product scores mean?
7. Which tool should you choose?

Choose a metal detector to find buried metal objects; choose a magnetometer to measure magnetic fields. In a metal detector vs magnetometer comparison, the right tool depends on whether you want to locate a target or measure magnetism.

A metal detector can help you search for coins, jewelry and relics in soil or sand. A magnetometer, including a gauss meter, measures a magnetic field and may help locate objects that produce one.

The word “magnetometer” can cause confusion because some instruments are used to detect magnetic materials. That doesn't make every magnetometer a general-purpose treasure detector.

Metal detector vs magnetometer: what does each tool do?

A metal detector looks for metal targets, while a magnetometer measures magnetic fields. The tools can overlap when a metal object is magnetic, but their jobs and readings differ.

A hobby detector uses a search coil to create an electromagnetic field. When that field interacts with a metal target, the detector responds with a signal that can help you find it.

For a closer explanation, see How Does a Metal Detector Work? Explained.

A magnetometer senses magnetic fields and reports information such as field strength or direction, depending on its design. A gauss meter, for example, can express field strength in gauss or millitesla.

The AEGTEST 8103 is specified for DC magnetic field measurement, with a transverse Hall probe and a stated range of 0–2500 mT.

That reading is different from a detector beep or target response. A detector doesn't give you a calibrated measurement of how strong a magnet is.

Is a metal detector a magnetometer?

No, a typical hobby metal detector is not a magnetometer. It detects metal through electromagnetic interaction; it doesn't measure magnetic field strength as its main job.

Some metal targets are magnetic, while others aren't. Iron and steel are often magnetic, but many common detecting targets, such as copper and aluminum, aren't attracted to a magnet.

A detector can still respond to them.

A magnetometer may help locate an object with a strong enough magnetic signature. It may miss nonmagnetic metal objects, so it isn't a substitute for a detector when you want to search for a mix of coins, jewelry and relics.

For more on how a detector handles different targets, read How Does a Metal Detector Tell Metals Apart?. The detector's response can help you judge a target, but it doesn't turn the tool into a magnetic-field meter.

What materials can each tool detect?

A metal detector is usually the more useful choice for mixed metal targets; a magnetometer is useful when magnetic response is the clue you need. Neither tool guarantees a find, and the target, depth, soil and instrument all matter.

A metal detector can respond to magnetic and nonmagnetic metals. Its ability to detect a particular item depends on factors such as target size, position, depth, detector settings and ground conditions.

A magnetometer responds to the magnetic field, not to “metal” as a broad category. Ferrous objects or magnets may create a stronger field signature than nonferrous items, but the instrument's range and sensitivity matter.

Don't assume that a magnetometer will find every steel object or that a metal detector will identify a magnet's poles. Choose based on the output you need: a target signal, or a magnetic measurement.

Explore examples of hobby finds in What Can You Find With a Metal Detector?. If you're curious about the role magnets play in a detector, Do Metal Detectors Use Magnets? covers that separate question.

How do their search methods compare?

A metal detector is made for sweeping an area; a magnetometer is used to measure a field at a point or along a survey path. The right approach depends on how much ground you need to cover and what you already know about the target.

With a hobby detector, you move the search coil across the ground in a controlled pattern and listen or watch for a target response. The guide to how a metal detector sees underground explains why the coil's field and target position affect what you hear.

A handheld pinpointer serves a different step. Once a larger detector gives a signal, a pinpointer helps narrow the search in the soil or recovery hole.

Learn how a pinpointer metal detector works before choosing one as an accessory.

A magnetometer is more suitable when you need to assess a magnetic field or search for a magnetic signature. Depending on the instrument and task, you may take readings near an object, compare measurements, or follow a survey route.

A basic gauss meter isn't automatically a deep-search device.

Which tool fits a hobby search?

For a broad search for coins, jewelry or relics, choose a metal detector. The Bounty Hunter TK4 Tracker IV has all-metal, tone and discrimination modes, adjustable sensitivity and an 8-inch waterproof search coil, which align with general-purpose searching.

For narrowing down a signal after digging, consider a pinpointer. The Garrett Pro-Pointer AT is a handheld metal detector with three sensitivity levels and a fast retune feature; it can help you focus on a smaller target area.

If your goal is gold, choose equipment for the method and target. A detector and a pan serve different roles, so check gold panning equipment if you're deciding how to search stream material.

Which tool fits a measurement task?

Choose a magnetometer or gauss meter when you need a magnetic-field reading, such as checking the field from a magnet or assessing a DC magnetic source. Match the meter to the kind of field and measurement range in your task.

The AEGTEST 8103 is specified for DC fields and includes a Hall probe. Its listed functions include magnetic field strength and pole direction measurement, plus data hold, storage and alarm features.

A miniature magnetic bubble level has a different purpose again. The Yan He mini level has a magnetic feature for attaching to iron, but its bubble vial checks whether a surface is level.

It doesn't locate buried targets or measure field strength.

What should you check before choosing?

Start with the result you need, then check the tool's limits and working conditions. A familiar name or magnetic feature doesn't tell you whether a device fits your search.

For a metal detector, consider the target types, search area, ground conditions and whether you need a waterproof coil. Check which settings help you manage unwanted signals and whether the detector suits your experience.

For a magnetometer, check whether it measures the type of field you need, the units and range, and whether its probe suits the object or surface. The AEGTEST 8103 is specified for DC measurement, so don't assume it covers every magnetic-field task.

For a pinpointer, think about where you'll use it after the main detector signals. The Garrett Pro-Pointer AT is submersible up to 20 feet, with an orange casing and a built-in ruler.

A product's word “magnet” can refer to an attachment feature rather than a measuring function. The Yan He level attaches to iron; that doesn't make it a magnetometer.

What do the product scores mean?

Our scores weigh specs and features against what each tool is meant to do. A higher score here reflects fit for a likely use in this comparison, not a claim that every tool serves the same purpose.

The Bounty Hunter TK4 Tracker IV scores 9.7 for general treasure hunting because its three detection modes, adjustable sensitivity and waterproof coil fit a broad metal-detecting task. The Garrett Pro-Pointer AT scores 9.5 for narrowing down a target after a detector signal.

The AEGTEST 8103 Gauss Meter scores 9.2 for DC magnetic-field measurement because it provides a Hall probe and a stated measurement range. The Yan He mini level scores 9 for checking level on a small iron surface, not for finding buried objects.

Which tool should you choose?

Pick a metal detector for searching for buried metal, a magnetometer for measuring magnetic fields, and a pinpointer for narrowing down a detector signal. Choose the tool by the result you need, then confirm its stated limits suit your target and conditions.

For broad hobby searches, the Bounty Hunter TK4 Tracker IV is the clearest fit among these products. Choose the Garrett Pro-Pointer AT when you need a handheld tool to help locate a target more closely after a larger detector signals.

Pick the AEGTEST 8103 when your task calls for a DC magnetic-field measurement. The Yan He mini level is for checking whether a surface is level, with a magnetic feature that lets it attach to iron.

If a device promises long-range locating, check what it measures and how it works before relying on it. Our guide to whether long-range metal detectors work explains what to look for.

Frequently asked questions

Is a metal detector a magnetometer?

A metal detector isn't the same tool as a magnetometer. A metal detector signals when its electromagnetic field interacts with a metal target, while a magnetometer measures magnetic field strength or direction.

Some magnetometers can help locate magnetic materials, but they don't work like a general-purpose hobby detector.

Can a magnetometer find buried metal?

A magnetometer may help locate buried objects that produce a detectable magnetic field, such as some iron or steel targets. It won't find every metal object, including many nonferrous targets, and the result depends on the object, depth, soil and instrument.

Use a metal detector for broader hobby searches.

Will a metal detector find a magnet?

A metal detector can respond to a magnet because a magnet is made from material that can interact with the detector. The response depends on the detector, target size, orientation, depth and nearby soil.

A detector signals a target; it doesn't measure the magnet's field strength.

Which tool should I use to check a magnet's strength?

Use a gauss meter or another suitable magnetometer to measure magnetic field strength. A metal detector can indicate that a metal target is nearby, but its signal isn't a calibrated reading of a magnet's strength or pole direction.

Confirm the meter is suitable for the type of field you need to measure.

Can a pinpointer replace a metal detector?

A pinpointer helps narrow down a target after a larger detector has found the area. Its short-range search is useful around a plug of soil or in a recovery hole, but it isn't meant to cover a wide search area.

Carry both if you want broad searching followed by closer locating.