NOKTA SP28 Simplex Search Coil

( Brand: Nokta ), ( Manufacturer Part Number: SP28 ), ( Type: Search Coil )

Review NOKTA Simplex Inch Search Coil

The **Nokta SP28 Simplex Search Coil** is a high-performance, all-terrain metal detector designed for serious prospectors, treasure hunters, and mineral explorers seeking precision, durability, and versatility in the field. Engineered with Nokta s signature attention to detail, this coil combines cutting-edge technology with rugged construction to deliver exceptional detection capabilities across a wide range of environments, from dense forests and rocky terrains to sandy beaches and urban areas. The **SP28 Simplex** features a **28-inch (71 cm) high-frequency (HF) search coil**, optimized for deep penetration and superior target separation, making it ideal for locating buried metals, coins, relics, and minerals with minimal interference from surrounding debris. Its **adjustable sensitivity and discrimination controls** allow users to fine-tune the detector for specific types of targets, whether fine gold, iron, or non-ferrous metals, ensuring a balance between sensitivity and false signals. The coil s **elliptical shape** enhances ground coverage while reducing coil drag, enabling smoother operation over uneven surfaces, and its **durable, lightweight construction** ensures longevity even in harsh conditions.

At the heart of the SP28 Simplex is Nokta s **advanced signal processing technology**, which minimizes ground mineralization effects and enhances target identification through its **multi-frequency pulse induction (PI) system**. This allows the detector to adapt dynamically to varying soil conditions, providing clearer audio and visual feedback for faster, more accurate pinpointing. The **waterproof and dustproof design** ensures reliable performance in wet or muddy environments, while the **ergonomic handle and adjustable headstrap** offer comfort during extended search sessions. Whether used for prospecting gold, recovering lost items, or exploring archaeological sites, the SP28 Simplex delivers a seamless blend of performance and reliability, making it a top-tier choice for both beginners and experienced metal detecting enthusiasts. Its **compact yet robust build** also makes it highly portable, allowing users to carry it effortlessly into remote locations without compromising on detection power. With the SP28 Simplex, adventurers gain a trusted companion for uncovering hidden treasures with confidence and precision.

### **Pros and Cons of buying a Nokta SP28 Simplex Search Coil**

The **Nokta SP28 Simplex** is a popular metal detector designed for serious hobbyists and professionals. Below is a detailed breakdown of its advantages and disadvantages.

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### **Pros**

1. **High Sensitivity and Detection Range**

The SP28 uses a **Simplex search coil**, which provides excellent sensitivity for detecting small targets, especially in mineralized soils. Its **11-inch (28 cm) coil** offers a good balance between depth and search speed, making it effective for both shallow and moderately deep targets.

2. **Adjustable Sensitivity and Discrimination**

The detector features **adjustable sensitivity controls**, allowing users to fine-tune performance based on soil conditions. The **discrimination settings** help filter out unwanted signals (e.g., rocks, trash) while targeting specific metals like gold, silver, or jewelry.

3. **Durable and Waterproof Construction**

The SP28 is built with **high-quality materials**, including a **waterproof body** (IP67 rating), making it suitable for beach, freshwater, and light saltwater searching. The **shock-resistant design** ensures longevity in rugged conditions.

4. **User-Friendly Interface**

The detector includes a **clear LCD display** with adjustable settings for **VLF (Very Low Frequency) and PI (Pulse Induction) modes**, though it primarily operates in VLF mode. The **easy-to-navigate controls** make it accessible for beginners while still offering advanced features for experienced users.

5. **Good for Gold and Jewelry Prospecting**

The SP28 performs well in **mineralized soils**, where other detectors may struggle. Its **narrow beam angle** helps reduce false signals, making it ideal for **gold panning, jewelry hunting, and coin searching** in challenging conditions.

6. **Affordable Compared to High-End Models**

While not the cheapest detector on the market, the SP28 offers **strong performance at a reasonable price**, making it a cost-effective choice for serious hobbyists who want professional-grade features without breaking the bank.

7. **Good for Beginners and Intermediate Users**

The detector s **intuitive design** and **adjustable settings** make it suitable for those new to metal detecting. At the same time, its **customizable sensitivity** allows intermediate users to optimize performance for different terrains.

8. **Lightweight and Portable**

Weighing around **2.5 3 kg (5.5 6.6 lbs)**, the SP28 is **easier to carry** than heavier professional models, making it convenient for long search sessions.

9. **Compatibility with Accessories**

Nokta offers a range of **optional accessories**, such as **headphones, pinpointers, and coil upgrades**, allowing users to enhance their detecting experience over time.

10. **Strong Brand Reputation**

Nokta is a **well-established brand** in metal detecting, known for producing reliable detectors with good customer support. Many users report **long-term durability** with proper maintenance.

---

### **Cons**

1. **Limited Depth in Non-Mineralized Soils**

While the SP28 excels in **mineralized soils**, its performance **drops significantly in non-conductive soils** (e.g., sandy beaches, dry deserts). Users may need to switch to a **PI (Pulse Induction) mode** or a different detector for optimal results in such conditions.

2. **No Built-in PI Mode (Requires Upgrade)**

The SP28 is primarily a **VLF detector**, meaning it may not perform as well in **deep, dry, or highly resistive soils** where PI detectors shine. While Nokta offers **PI upgrades**, this adds extra cost and complexity.

3. **Sensitivity Can Be Overwhelming in Some Conditions**

The detector s **high sensitivity** can lead to **false signals** in **high-mineralization areas**, requiring constant adjustments. Beginners may struggle with **signal interpretation** until they gain experience.

4. **Coil Size Limits Search Speed**

The **11-inch coil** provides good depth but **slows down search speed** compared to smaller coils (e.g., 8-inch or 9-inch). Users who prefer faster scanning may find it less efficient.

5. **No Bluetooth or Smartphone Connectivity**

Unlike some modern detectors, the SP28 **does not support wireless connectivity** (e.g., Bluetooth, Wi-Fi). This means **no app-based tracking or data logging**, which some users find limiting for serious prospecting.

6. **Battery Life Can Be Short**

While the detector uses a **rechargeable battery**, some users report **shorter runtime** compared to other models, especially in **high-sensitivity mode**. Carrying spare batteries is recommended for long sessions.

7. **Discrimination Settings Can Be Inconsistent**

The **discrimination feature** works well for filtering trash, but in **high-mineralization areas**, it may **miss small gold nuggets** or other valuable targets. Users must manually adjust settings frequently.

8. **No Built-in Pinpointer**

Unlike some detectors that include a **pinpointer**, the SP28 requires a **separate purchase** for precise locating of targets, adding to the initial cost.

9. **Limited Customization Compared to High-End Models**

While the SP28 offers **adjustable sensitivity and discrimination**, it lacks **advanced features** found in premium detectors (e.g., **multi-frequency VLF, advanced PI modes, or AI-based target identification**).

10. **Customer Support and Warranty Vary by Region**

Some users report **mixed experiences with Nokta s customer service**, particularly outside major markets. While the warranty is typically **1 2 years**, **repair response times** can vary depending on location.

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### **Conclusion**

The **Nokta SP28 Simplex** is a **strong, versatile metal detector** that excels in **mineralized soils, gold prospecting, and jewelry hunting**. Its **high sensitivity, durability, and user-friendly design** make it a **great choice for beginners and intermediate users** who prioritize **performance in challenging conditions**.

However, it **struggles in non-mineralized soils** and lacks **advanced features** like built-in PI mode or Bluetooth connectivity. If you plan to search **mostly in mineralized areas, beaches, or freshwater**, the SP28 is an **excellent investment**. If you need **maximum depth in dry or resistive soils**, you may want to consider a **PI detector or a multi-frequency VLF model** alongside it.

For **serious hobbyists and prospectors** who want a **reliable, high-performance detector without excessive complexity**, the SP28 is a **highly recommended choice**. Beginners will appreciate its **ease of use**, while experienced users will value its **adjustability and durability**.

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### **Final Recommendation**

You primarily search in **mineralized soils, gold fields, or freshwater**.

You want a **durable, waterproof detector** with **good sensitivity**.

You prefer a **user-friendly design** without overly complex settings.

You are a **beginner or intermediate user** looking for a **balanced detector**.

You plan to **upgrade accessories** (e.g., PI mode, pinpointer) later.

You need **maximum depth in dry or sandy soils** (consider a **PI detector**).

You want **smartphone connectivity or advanced tracking features**.

You search **mostly in low-mineralization areas** (a **smaller coil or multi-frequency VLF** may be better).

You require **faster search speeds** (a **smaller coil or a different model** might suit you better).

**Best for:** **Gold prospectors, jewelry hunters, and serious hobbyists** who prioritize **performance in mineralized conditions** and **long-term reliability**.

Details:

Again this is for a Nokta Simplex Plus. 11 coil standard for the simplex plus metal detector. Nokta Simplex SP28 search coil. Used but works great.

part #: sp28 prices

• $126.65-$332.99

specifications metaldetectacc:

• brand: Nokta
• mpn: Sp28
• type: Search Coil

returns metaldetectacc:

• policy: No Returns

shipping metaldetectacc:

• carrier: USPS
• transit: 5-11 Days
• class: Standard
• type: Fixed
• cost: $18.50
• service: USPS Ground Advantage

seller metaldetectacc:

• city: Tunkhannock, Pennsylvania
• # reviews: 504
• rating: 100.0%

payments metaldetectacc:

• wallet: Google-pay
• other
• credit card: Diners-club

offer metaldetectacc:

• availability: In Stock
• started: April 12, 2026
• best offers: True
• sold: 0
• options: Ship-to-home
• quantity: 1

general metaldetectacc:

• Test, Measurement Inspection > Test Meters Detectors > Metal Detector Accessories
• condition: Used

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