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The ground you will hunt decides this more than the label does: manufacturers say pulse induction (PI) handles heavily mineralized soil and salt better than VLF, while forum contributors who prospect for gold say VLF detectors do find gold, and the price gap is large (from $899 for a VLF gold detector to $2,299.99 and up for PI on the store we checked). If your ground is mild or full of iron trash, a VLF can make sense. If it is black sand, hot rock or salt, a PI is the type the makers recommend. We have not tested either type, so below is what is published, what is priced, and what prospectors say in public threads.
The two technologies side by side
The characterization below follows Garrett’s own explainer pages, so it reflects a manufacturer’s view (neither page shows a date). Prices were checked on 8 October 2026.
| VLF | Pulse induction (PI) | |
|---|---|---|
| How it works | Sends a continuous wave through the coil and reads phase shifts to estimate the target type before you dig | Fires rapid high-voltage bursts and measures how fast the returning signal decays |
| Highly mineralized ground and salt | Garrett names these as its main weak spots; works best in mild soil | Garrett says it outperforms VLF in highly mineralized soil; black sand and salt have little effect |
| Discrimination (telling trash from targets) | Strong | Weak: Garrett says PI trades discrimination for depth, so you may dig more trash |
| Small targets | Highly sensitive, according to Garrett | Garrett’s explainer does not make small targets its focus |
| Depth | Moderate to strong in mild soils | Strong; reaches deeper than VLF typically can (manufacturer’s claim) |
| Battery drain | Low | High, according to Garrett |
| Gold detector example and price | Minelab Gold Monster 1000, $899 at High Plains Prospectors (bundle with 5-inch coil and an extra battery) | Garrett Axiom Lite, $2,299.99 at High Plains Prospectors |
Minelab’s specification page lists the Gold Monster 1000 as a VLF detector at 45 kHz, 1.33 kg, with a 5-inch double-D coil rated waterproof to 1 m, a splash/rain-proof control box and a 2-year warranty. The Axiom Lite figures come from Garrett’s article (a little over 4 lb, 11″ x 7″ mono coil) and the store listing.
What the makers say, and why to read it with care
Garrett’s articles on detector types and on ground mineralization draw the same line: VLF suits precise hunting on dry land in mild soil, and PI suits depth in tough ground and saltwater beaches. Garrett sells PI detectors such as the Axiom, so the framing leans toward the type it sells. The ground-mineralization article lists the causes it considers important: iron compounds, salt, black sand, volcanic or mineral-rich geology, and human sources such as mining runoff. The detector-types article also describes multi-frequency detectors as a middle option, strong in mineralization and discrimination, with more controls to learn. We do not cover those here.
What prospectors say
A February 2017 Detector Prospector thread shows a less one-sided view, from forum members rather than a seller:
- One prominent contributor says many general-purpose VLF detectors running about 13 to 19 kHz now double as prospecting machines even though they are not marketed that way, and that any VLF at 30 kHz or higher “is exceptional still”.
- The same contributor says a general-purpose VLF, the White’s MXT, has found a lot of gold despite not being a dedicated prospecting machine.
- Another member advises nugget hunters to get a nugget detector and coin or relic hunters a coin or relic machine, arguing that machines meant to do everything do many things poorly.
- A third says a VLF will find gold where he prospects, but that he judges a detector by consistency from trip to trip, not by occasional finds, and that different detectors suit different conditions.
These are opinions from 2017, not measurements, and the thread does not compare VLF and PI directly. What they add is that “PI for gold” is not the only view in the hobby.
What it costs
On the store we checked, the Gold Monster 1000 listing above is $899 and is a bundle with an extra battery. The cheapest PI gold detector we found there is the Axiom Lite at $2,299.99. Going further up, our three-way comparison of PI gold detectors lists the Garrett Axiom at $3,199.99 and, on the same store, the Nokta Magnetar 9000 at $4,999 and the Minelab GPX 6000 at $6,999. That is a $1,400 gap between the VLF above and the cheapest PI, and more than $6,000 to the top.
How to decide
- Mild ground, lots of iron trash, small gold: a VLF with good discrimination is the type forum members describe using successfully, and it costs far less. Start there if you are not sure.
- Black sand, hot rock or heavily mineralized ground: this is where Garrett says PI outperforms VLF. Ask local prospectors whether PI is what they use on your patches.
- Saltwater beaches: Garrett lists PI for saltwater and says VLF is a weak fit; check the manual of the exact model before you buy.
- Before you spend: ask a local club which type works on the ground you plan to hunt. Check where you may detect at all with our guide to federal land rules.
FAQ
Is PI always deeper than VLF?
Garrett says PI typically reaches deeper than VLF, especially in mineralized soil. That is a manufacturer’s statement, and we found no independent measurement to confirm it. Depth also depends on coil size, target size and ground.
Can a VLF detector find gold?
Forum contributors in the 2017 thread say yes, and Minelab sells the Gold Monster 1000, a VLF, as a gold detector. Small, shallow gold in mild ground is the case most often described for VLF.
Does PI tell you what the target is?
Garrett says PI has weak discrimination, so you may dig more trash. Some PI detectors add features to help; check each model’s manual.
Which is better for saltwater?
Garrett’s explainer lists PI as suited to saltwater beaches and VLF as weak there. Whether a given model’s control box can get wet is a separate question: check its water rating. Minelab’s page rates the Gold Monster 1000’s coil to 1 m and its control box as splash/rain proof.
What about multi-frequency detectors?
Garrett describes them as strong in mineralization and discrimination, with more controls to learn. They are not covered in this guide.
How we put this guide together
We read two Garrett explainer articles (neither shows a date), Minelab’s specification page for the Gold Monster 1000, a 2017 Detector Prospector thread, and store listings priced on 8 October 2026. Garrett is a manufacturer; we say so wherever we use its claims. We do not own or field-test detectors. Full method.