Nokta Makro Simplex+ Waterproof Metal Detector Top Core Tips

Published on: December 4, 2025 | Updated on: December 4, 2025

The Nokta Makro Simplex+ Waterproof Metal Detector is a powerful, user-friendly machine. Success relies on mastering its core settings, especially Ground Balance, Sensitivity, and Iron Volume. Use the correct mode—Park, Field, or Beach—to maximize depth and minimize false signals in different environments.

The Nokta Makro Simplex+ changed the metal detecting world. It offers professional features at a price that beginners can afford. It is a true waterproof detector, meaning you can search lakes, rivers, and the ocean shore. However, many new users feel frustrated by chatter or shallow finds. This usually happens because the core settings are not tuned correctly for the ground. Do not worry; learning to maximize the Simplex+ is simple once you know the secrets. We will walk through the top core tips used by expert detectorists. These tips will help you unlock the full potential of your Nokta Makro Simplex+ Waterproof Metal Detector.

Mastering the Simplex+ Search Modes for Different Terrain

The Simplex+ has four main search modes: Park, Field, Beach, and All Metal. Each mode is designed for specific types of ground and targets. Using the wrong mode causes noisy signals and missed treasures. The key to successful detecting is selecting the right mode before you start swinging the coil.

The machine changes its internal VLF (Very Low Frequency) programming based on the mode. Park Mode is excellent for highly trashy areas, like playgrounds or city parks. It uses faster recovery speed to separate targets close together. Field Mode is best for open areas like farms or old homesteads, focusing on relics and deeper coins. Beach Mode is essential for wet sand and saltwater. It handles the highly mineralized conditions found near the ocean. All Metal Mode gives maximum depth but accepts all targets, including nails and iron, requiring careful listening.

Understanding the Four Core Modes

• Park Mode: Best for areas with high trash density. It quickly processes signals to separate good targets from junk. Use this mode where people gather, like public parks.
• Field Mode: Ideal for general hunting, especially relics and older coins in low-to-medium mineralization. It provides a good balance of depth and discrimination.
• Beach Mode: Mandatory for wet sand, shallow water, and saltwater environments. This mode automatically adjusts to the conductivity of salt minerals.
• All Metal Mode: Provides the deepest detection possible. It should be used when searching for very deep or faint signals, accepting both iron and non-iron targets.

Always start your hunt by choosing the mode that best matches your current location. This single step prevents much frustration and instantly improves your target identification.

Essential Setup Secrets: Ground Balance and Sensitivity

The most important steps for maximizing the depth of your Nokta Makro Simplex+ Waterproof Metal Detector are setting the Ground Balance and Sensitivity. If these are wrong, your detector will chatter loudly or miss deep targets entirely. Ground Balance tells the detector to ignore the natural mineralization in the soil. Sensitivity controls how strongly the detector listens for targets.

Always perform an automatic Ground Balance when you arrive at a new location. Press and hold the Ground Balance button while pumping the coil up and down quickly, 1 to 6 inches above the ground. The Simplex+ will display a number, showing the soil’s magnetic content. If you are detecting near the ocean, especially in wet sand, the Ground Balance number will be much higher, often in the 80s or 90s.

Tuning Sensitivity for Stability

Sensitivity should be set as high as possible while keeping the detector quiet. A detector that is too sensitive will give false signals, called chatter. Start with Sensitivity at the factory default (usually 4 out of 6 bars). If the machine is quiet, raise it one bar at a time. If it starts chattering, lower the Sensitivity by one bar. A stable machine finds more treasure than a noisy one.

Properly grounding your Simplex+ and finding the maximum stable Sensitivity ensures you are listening only to potential treasures, not the ground noise.

The Power of Discrimination and Notch Filtering

Discrimination is the feature that allows your Simplex+ to ignore certain types of metal, usually iron. Notch filtering is a more specific form of discrimination. It lets you ignore a small range of Target ID numbers (VDI numbers). Using discrimination wisely saves you hours of digging junk.

Most detectorists discriminate against iron (VDI 0–15). Iron is typically nails, bolts, and scrap metal. If you are hunting relics, you might need to keep some iron targets open. Old iron artifacts can have VDI numbers slightly higher than 15. The Simplex+ allows you to easily adjust the lower discrimination limit. For coin shooting, setting the lower limit to 15 is often a good start.

Strategic Use of Notch Discrimination

Notch filtering should be used sparingly, especially by beginners. If you know a specific type of junk metal is common in your area, you can notch out its VDI range. For example, some aluminum screw caps might hit consistently at VDI 40. You can notch out 40 to ignore them. However, be careful. Good targets can sometimes register close to junk targets. Notching out too much can cause you to miss valuable items like thin gold rings or small silver jewelry.

I recommend keeping the discrimination simple: only discriminate out VDI 0–15 unless you are very familiar with your hunting site. This minimizes the risk of missing good targets that might be masked by trash.

Deep Diving: Maximizing Depth and Signal Clarity

Every detectorist wants more depth. The Simplex+ is capable of impressive depth, especially for a single-frequency VLF detector. Achieving maximum depth requires more than just high sensitivity; it involves adjusting the Iron Volume and understanding recovery speed.

The Iron Volume control is a powerful, often overlooked feature of the Nokta Makro Simplex+ Waterproof Metal Detector. This setting adjusts how loud iron targets sound. When you lower the Iron Volume, the sound of iron becomes quieter. This lets the non-ferrous (good target) signals stand out more clearly, especially when they are deep. A deep coin signal often sounds weak and may be mixed with a faint iron grunt. By lowering the Iron Volume, you filter out the distracting iron sound and hear the faint coin signal better.

Optimizing Recovery Speed

Recovery speed dictates how quickly the detector can process one target and be ready for the next. The Simplex+ has an adjustable recovery speed. In trashy areas (Park Mode), you want a faster recovery speed. This separates targets close together. However, faster recovery speed slightly reduces maximum depth. In clean fields (Field Mode or All Metal), you can use a slower recovery speed. Slower speeds allow the signal to linger longer, giving the detector more time to analyze deep targets, thus increasing depth.

• Lower Iron Volume: Essential for hunting deep targets, especially in mineralized ground.
• Slower Recovery Speed: Use in clean areas to gain maximum depth potential.
• Steady Swing: Maintain a slow, consistent coil swing speed. Fast swinging can cause the Simplex+ to miss faint, deep signals.

By adjusting the Iron Volume and managing recovery speed, you can significantly enhance your ability to detect targets buried far beneath the surface.

Conquering EMI (Electromagnetic Interference)

Electromagnetic Interference (EMI) is the enemy of stable metal detecting. EMI comes from power lines, cell phone towers, Wi-Fi routers, and even other metal detectors nearby. When your Simplex+ starts making random, non-stop noise (chatter) even with low sensitivity, you are likely dealing with EMI. This interference can ruin a hunt by masking real target signals.

The Simplex+ offers a crucial feature called Frequency Shift. Since the detector operates on a single frequency (12kHz), shifting that frequency slightly can often move it away from the interfering noise source. This is one of the most important tools for stability in urban areas.

How to Use Frequency Shift

If you encounter heavy chatter:

1. Lower the Sensitivity to see if the noise stops. If it does not, the noise is likely EMI, not ground mineralization.
2. Access the Frequency Shift menu on your Simplex+.
3. Cycle through the available frequency options (F1, F2, F3).
4. Stop on the setting that provides the quietest operation.

Sometimes, simply moving ten feet away from a structure can eliminate EMI. If you are near power lines, try shifting the frequency first. If the problem persists, you must lower the Sensitivity until the machine runs quietly. A quiet detector is a happy detector, and a happy detector finds treasure.

Learning to identify and correct for EMI using the Frequency Shift feature is critical for hunting successfully in populated or built-up environments.

Specialized Tips for Waterproof Operation (Wet Sand & Saltwater)

The Nokta Makro Simplex+ Waterproof Metal Detector is rated IP68, meaning it is completely submersible. This opens up incredible treasure hunting opportunities on beaches and in shallow water. However, detecting in saltwater and wet sand presents unique challenges due to high conductivity.

Saltwater is highly conductive and causes standard VLF detectors to give constant false signals. This is called “salt effect.” To combat this, you must use Beach Mode. Beach Mode is specifically designed to handle the conductivity of salt. When transitioning from dry sand (which is low mineral) to wet sand or shallow water, always switch modes immediately.

Ground Balancing in Saltwater

When using Beach Mode, you must perform a precise Ground Balance. Do not try to pump the coil in the air and then on the wet sand. Pump the coil only over the wet sand or submerged area where you are detecting. This ensures the Simplex+ is properly tuned to the highly conductive minerals. Even a small change in water depth can require re-balancing.

I find that lowering the Sensitivity slightly in the wet sand often helps stabilize the machine further. You sacrifice a tiny bit of depth, but you gain stability, which is far more important near the water. Always check the battery cap and coil connection before submerging the unit to maintain its waterproof integrity.

The Simplex+ excels in wet environments when the Beach Mode and proper ground balancing techniques are consistently applied.

For more detailed instructions on maintaining waterproof gear, always refer to the manufacturer’s official guidelines on detector care.

Coil Control and Swing Techniques for Best Coverage

Even the best settings cannot compensate for poor coil control. The way you swing the search coil dramatically impacts the depth and coverage you achieve. The Simplex+ typically comes with an 11-inch DD coil, which is excellent for general use.

The goal is to move the coil slowly and smoothly, keeping it parallel to the ground at all times. If the coil lifts up at the end of the swing, you lose depth in that area. Try to overlap each swing by about half the diameter of the coil. This ensures that no potential target is missed between passes.

The Importance of Slow Movement

Many beginners swing the detector too fast, especially when they are excited. Swinging fast causes the detector to miss faint signals from deep targets. Slow your pace significantly. Walk slowly and let the Simplex+ analyze the ground thoroughly. If you get a faint, questionable signal, slow down even more and try swinging the coil from different directions (e.g., North-South, then East-West). This technique, called cross-hatching, helps confirm the target’s location and shape.

Good coil control—slow, smooth, and parallel swings—is the foundation upon which all successful detecting is built, maximizing the coverage of your Simplex+.

Maintenance and Longevity for Your Waterproof Investment

Since the Nokta Makro Simplex+ Waterproof Metal Detector is designed for harsh environments, proper maintenance is crucial for its longevity. A waterproof detector needs special care, especially after use in saltwater.

Saltwater is highly corrosive. After any beach or ocean hunt, you must thoroughly rinse the entire detector, including the coil, shaft, and control box, with fresh water. Do not spray high-pressure water directly into the speaker or connector ports. A gentle shower or hose rinse is sufficient. Make sure the battery charging port cap is securely fastened during the rinse.

Checking Connections and Updates

Always inspect the connections. Ensure the coil cable is tight and clean. Periodically check the firmware. Nokta Makro frequently releases updates to improve performance and add new features. Updating the firmware is easy using a computer and the provided USB cable. Keeping your detector updated ensures you have the best possible performance and stability from your Simplex+.

Proper cleaning, especially after saltwater exposure, and regular firmware updates will keep your Simplex+ performing reliably for many years. Always store the detector in a dry, cool place when not in use.

You can check for the latest firmware and update instructions on the official Nokta Makro website.

Integrating Accessories: Pinpointers and Headphones

A metal detector is only half the battle. To maximize efficiency and protect your finds, you need essential accessories. The most critical tools are a quality pinpointer and appropriate headphones. The Simplex+ is designed to work seamlessly with accessories.

A pinpointer saves enormous amounts of time. Once the Simplex+ locates a target, a pinpointer (like the Nokta Pulsedive) helps you pinpoint the exact location in the dirt plug. This means less destructive digging and faster retrieval. Always use the pinpointer after digging the plug to isolate the target quickly.

Choosing the Right Headphones

The Simplex+ is compatible with wireless headphones (Green Edition) or wired waterproof headphones. Using headphones is mandatory for serious detecting. They block out ambient noise, allowing you to hear the subtle, deep signals that indicate valuable targets. The faint “whisper” of a deep coin can easily be missed without headphones. If you are detecting near the water, invest in a set of waterproof headphones designed for submergence.

Using a pinpointer speeds up recovery, and using headphones ensures you hear every single target signal your Simplex+ finds.

Deep Dive into Iron Volume and Target ID Stability

Understanding how Iron Volume interacts with Target ID stability is key to avoiding costly mistakes. Target ID (VDI) is the number the Simplex+ assigns to a target, estimating what kind of metal it is. A stable VDI number is good; a jumpy, erratic VDI is usually bad.

When a target is very deep, the Simplex+ struggles to get a clear VDI reading. The number might jump between 30 (mid-range copper) and 10 (iron). This is often called a “break up” signal. If you hear a good tone (high pitch) but the VDI is unstable, it is usually a deep target. Many beginners skip these signals because of the unstable ID.

The Role of Iron Volume in Unstable Signals

Lowering the Iron Volume helps you analyze these unstable signals better. If the signal breaks up but you hear a clear, repeatable high tone, and the Iron Volume is low, you can focus on the non-ferrous part of the signal. If the signal is deep and you hear a distinct low-tone grunt mixed in, it might be a small piece of iron or a deep target near iron. By turning the Iron Volume down, you eliminate the distracting low grunt, allowing you to focus purely on the high tone. If the high tone persists, dig it. It is often a deep coin or relic.

Never ignore a repeatable high tone, even if the Target ID is erratic. Use low Iron Volume to isolate and analyze these critical deep signals.

Advanced Search Techniques: Gridding and Target Confirmation

Professional detectorists use systematic search patterns to ensure they cover an area thoroughly. This is called gridding. Random searching often results in missing large sections of the hunting ground. When you use your Nokta Makro Simplex+ Waterproof Metal Detector, treat the area like a grid.

Start at one edge and walk in straight lines, overlapping your swings. When you finish covering the entire area in one direction (North-South), turn 90 degrees and cover the entire area again (East-West). This cross-hatching technique maximizes coverage and helps you confirm signals that might have been masked by coil orientation in the first pass.

Confirming Signals Before Digging

Before you dig any signal, confirm it is repeatable. Swing the coil over the target slowly from four directions. If the signal disappears when swinging from one direction, the target might be very deep, small, or masked by iron. If the signal remains strong and clear from all directions, you have a solid target. If the VDI is unstable (jumpy), try lifting the coil slightly. If the signal disappears quickly, it is a shallow junk target. If the signal persists when lifting the coil a few inches, it is a deep, valuable target.

Using a strict gridding pattern and verifying every signal saves time and dramatically increases your find rate.

Frequently Asked Questions About the Simplex+

What is the best Sensitivity setting for the Simplex+?

The best Sensitivity setting is the highest number you can use without the detector making false, noisy signals (chatter). This setting changes based on the ground mineralization. Start at 4 bars and increase it until chatter begins, then back it down one bar.

Can I use the Simplex+ in saltwater?

Yes, the Nokta Makro Simplex+ is fully waterproof (IP68 rated). You must switch the machine to Beach Mode when detecting in wet sand or saltwater. You must also perform a proper Ground Balance in the water or wet sand.

How deep can the Simplex+ detect targets?

Depth depends heavily on target size, orientation, and ground conditions. Under ideal conditions, the Simplex+ can detect a coin-sized target 8 to 12 inches deep. Large objects can be detected much deeper, sometimes up to three feet.

What does the VDI number mean on the Simplex+?

VDI stands for Visual Discrimination Indicator, also called Target ID. It is a number (usually 0 to 99) that the Simplex+ assigns to the target. Higher numbers typically mean larger or more conductive metals like silver or copper. Low numbers (0–15) are usually iron.

Why does my Simplex+ keep chattering?

Chattering is usually caused by two things: high ground mineralization or electromagnetic interference (EMI). First, try performing an automatic Ground Balance. If the noise continues, lower the Sensitivity. If that fails, use the Frequency Shift feature to tune out external electronic noise.

Should I upgrade the coil on my Simplex+?

The stock 11-inch DD coil is excellent for general use. However, a smaller coil (like 9.5-inch) can be helpful for extremely trashy areas to separate targets better. A larger coil (13-inch) can give slightly more depth in clean fields.

Final Words on the Nokta Makro Simplex+

The Nokta Makro Simplex+ Waterproof Metal Detector is an outstanding machine. It offers phenomenal value and performance, making it a favorite among serious hobbyists and beginners alike. Success with this detector comes down to smart setup, not expensive upgrades.

Focus your attention on three core areas: mastering the search modes, achieving a stable Ground Balance, and using the Iron Volume feature strategically. Remember that a slow, steady swing and the use of headphones will unlock the faint, deep signals that lead to the best finds. By applying these field-proven core tips, you will transform your Simplex+ from a good detector into a treasure-finding powerhouse.