Best Underwater Metal Detector

Underwater Metal Detectors

Underwater metal detecting is an exciting and amazing hobby, and actually a hard one. There are different levels of metal detecting underwater, from shallow water search somewhere on the crowded beach, and deep water search and even gold prospecting. Such type of search needs expert skills, and also expert equipment, including various accessories. If you are interested in subaquatic metal detectors, make sure you opt for the most suitable for yourself. 

Best Underwater Metal Detectors for 2020 

We have created a list of the best underwater metal detectors below, to facilitate your decision-making. Our choice was based on the five main characteristics – topicality, multitasking, features, budget, and durability. Check out the list and see if you can find something suited to your needs! 

What Are the Differences Between Waterproof and Underwater Detectors? 

The difference between these two types of detectors is simple. Subaquatic machines can function seamlessly when fully submerged. Pay attention what maximum allowed depth is indicated in the device’s tech specs, and avoid using it even deeper. In other aspects, subaquatic machines are fully isolated from water, and can work underwater for around 30 minutes without pause. 

As for waterproof machines, these are usually moist-protected machines that can withstand wet weather, fog, rain, and wet grass. Sometimes, they have waterproof coils, and therefore can function in shallow water up to 15 inches or so. But such machines cannot be submerged fully, and they are not suitable for search in the waves, when water can reach the control box. 

Key Features of Underwater Metal Detectors 

Besides being fully water-protected, metal detectors for underwater must include several key features that define productivity. The first feature is high quality discrimination that will help filter out noise and false signals. The second feature is multifrequency, or high operating frequency. The third key feature is manual or automated ground balance that will assist in successful and productive treasure hunting. And the fourth feature is ability for decent performance in highly mineralized salty water. 

Salt Water Search Peculiarities  

Salt water is an especially complicated medium for subaquatic metal detecting, because such water is highly mineralized and can trigger false signals in the detector. This also means that tracking really valuable objects is trickier in salt water. This is why you will need outstanding ground balance and discrimination for your machine. 

Wrap Up 

Underwater treasure hunting is a complicated, although exciting, activity. If you would like to really spot things and get valuable finds, make sure you choose a reliable and high quality machine!


Cheap detectors can be of two types - affordable, budget-friendly ones, and cheap Chinese replicas of famous brands. However, you need to be aware that there is no such thing as “affordable subaquatic metal detector”. High quality subaquatic machines cost higher than average, and this is normal. If you see a really cheap device, it is probably Chinese and is not worth your money.

If you have difficulties choosing, take time to read some underwater metal detectors reviews, and comments from real detectorists, on relevant forums.

That depends on the machine. Some professional level multi-purpose detectors can operate on land and underwater. However, specialized deep water machines do not function on land.

Every detector is likely to show better performance in clean water, and detect more noise in salty water, so make sure you have proper discrimination for the second option. But overall, yes, you can use the same device for salty and clean water bodies.