Hi! This is Nerd – I love discovering treasures and I am a true enthusiast of equipment that survives being “cooked” in mud and water. This time I tested the model MD‑940B, which boasts a giant 10-inch coil, IP68 water resistance, and a smart DSP chip. Here's my review - again with nerdy style.
Technical capabilities and functions
Waterproof IP68 – compact and truly waterproof display and dial, the coil survives diving and searching on the shore.
10″ search coil – high coverage and depth of detection even of larger metal targets.
Advanced DSP chip (USA) – improved accuracy, less interference, greater sensitivity to metals at greater depth.
6 detection modes – including All Metal, elimination, SENS, positioning, many search modes depending on the terrain.
Memory function – remember a specific type of metal and you can later exclude it or search for a specific target.
LCD display with backlight – clearly displays metal type, depth, battery level – I like the transparency.
A nerd's practical experience
First impression and use
The backlit display is very readable, even in sunlight. The menu is intuitive - switching between modes, adjusting sensitivity and volume quickly reveals buried metal.
Searching in a wet environment
I tested it on wet sandy terrain and in shallow water - the coil didn't drop a drop of water, the signal is the same as on dry land. Ideal for beaches or muddy surfaces.
Clarity and accuracy
The DSP really makes a difference – even small coins are detected and with the memory function I can quickly set the device to ignore cans and other trash. They don't hear any interference with every piece of metal.
Autonomy
It is powered by a standard 9V battery (not included). The consumption is not excessive - I expect at least a few hours of continuous browsing. For serious trips it is wise to have a spare.
Advantages
Excellent IP68 water resistance – the coil goes into the water without any problems.
Powerful DSP chip – more precision, less interference.
Multiple detection modes + memory function – adaptive search.
Clear LCD display – low light is not a problem either.
Very good price for everything, with the features of so-called professional metal detectors
Disadvantages / Limitations
Battery (9V) not included – less convenient purchase.
No WLAN or Bluetooth connectivity – but fortunately this is not a problem in the field.
The weight of the coil can be a bit bothersome during prolonged use – but the stability of the device is worth this compromise.
Evaluation by criteria
| Criterion | Rating (★‑★5) | Comment |
|---|---|---|
| Water resistance (IP68) | ★★★★★ | Truly waterproof – great for wet conditions |
| Detection accuracy | ★★★★☆ | DSP and modes great, less interference most of the time |
| User interface | ★★★★★ | Easy operation and clear display |
| Battery autonomy | ★★★★☆ | Sufficient for multiple search campaigns |
| Price / value | ★★★★☆ | A solid investment for those looking for reliability |
Overall rating: 4.4 / 5 ⭐
Who do I recommend it to?
It is great for:
coin seekers by the sea, riverbanks or in wet areas,
more demanding users who want a choice of modes and a memory function,
lovers who are not afraid of rain and wet grass.
Not best suited for:
those looking for an ultra-light viewfinder with 360° detection,
professionals who want GPS tracking or mobile app connectivity.
Conclusion
The MD‑940B is a robust, precise and highly waterproof device, which defines classic metal detectors and takes them higher with DSP digital accuracy, memory and a clear display. If you are looking for a reliable adventure in wet terrain - this is the right choice.
Buy a metal detector from Nerd: MD‑940B
All metal detector at the Nerd shop.
