EDD-24XT Professional NLJD Semiconductor Detector

What is a Non-Linear Junction Detector (NLJD) and how does it work?

A Non-Linear Junction Detector is a specialist security tool used to find hidden electronic components. It works by transmitting a high-frequency radio signal (2.4 GHz) that reacts with the silicon junctions found in all modern electronics. When this signal hits a semiconductor, it reflects a specific “harmonic” signal which the device detects, even if the target is switched off.

Can the EDD-24XT find bugs that are turned off or have no battery?

Yes. This is the primary advantage of the product. Because it detects the physical properties of the silicon chips themselves, it can locate hidden microphones, cameras, and trackers whether they are active, in standby mode, or completely powered down with the battery removed.

How does the device distinguish between a real “bug” and a false positive?

The device uses “Harmonic Analysis.” Genuine electronics produce a strong 2nd Harmonic signal. Non-threatening materials, such as rusty nails or bimetallic junctions (often called “false junctions”), typically produce a 3rd Harmonic signal. The EDD-24XT uses an intelligent algorithm to compare these and notify the user if the material is likely ‘Silicon’ or ‘Metal’.

Can it detect modern SIM cards?

Yes. Despite their incredibly small size, SIM cards contain semiconductor junctions. The high sensitivity of the device allows it to detect these tiny components from a distance of up to 20cm, making it ideal for finding hidden mobile phones or GSM listening devices.

Is the unit difficult to operate for beginners?

While it is a professional-grade tool, it has been designed with an intuitive, user-friendly interface. The inclusion of an Audible Tone Mode allows users to sweep areas based on sound pitch without constantly needing to monitor the screen, while the probability indicator provides a clear ‘Silicon’ or ‘Metal’ assessment.

How portable is the equipment for field operations?

The EDD-24XT is one of the most portable units in its class. The handheld assembly weighs less than 900g, and the entire kit, including the extension pole, counterweights, and military-standard carry case weighs just 3.0 kg, making it perfect for rapid deployment and international travel.

What is the purpose of the included counterweights?

When the aluminium pole is fully extended to its 140cm maximum length, the unit can become top-heavy. The two 200g counterweights screw into the base of the handle to balance the weight, ensuring the operator can conduct long sweeps of ceilings or high-reach areas without arm fatigue.

How long does the battery last during a sweep?

The internal Lithium Polymer battery provides up to 4.5 hours of continuous use from a single charge, which is typically more than enough for a standard professional sweep of a large boardroom or executive office.

• First time users should have a basic understanding of RF (Radio Frequency) principles. It is prudent to conduct some practice sessions in a controlled environment prior to use ‘in the field’.
• The 2.4 GHz frequency is highly effective for modern electronics but can be affected by high-density environments. Consider if your primary sweep areas have high levels of Wi-Fi or Bluetooth interference, as the EDD-24XT operates on the 2.4 GHz ISM band.
• Be certain that you are authorised to use high-power RF transmission equipment in the specific region where the counter surveillance sweep is being undertaken? (The 2.4 GHz band is generally open for ISM use, but local regulations vary).
• The EDD-24XT NLJD is designed to discover physical components of electronics. However, best practice is for it to be used in conjunction with professional radio frequency detection equipment.

• Engineered to identify semiconductor junctions in all modern electronics, regardless of whether they are active, in standby, or completely powered off.
• Simultaneously monitors the 2nd Harmonic (4.8 GHz) and 3rd Harmonic (7.2 GHz) to distinguish between genuine electronic components and “false” junctions like oxidised metals.
• Delivers a focused 2.4 GHz signal at up to 4 Watts, providing the sensitivity required to detect tiny components like NANO SIM cards from up to 20cm away.
• Automatically analyses received signals to provide a Silicon or Metal probability indicator, allowing for rapid threat assessment.
• Provides an audible pitch that changes in frequency based on the strength of the 2nd Harmonic signal, enabling easier analysis.
• Allows the operator to listen to the actual demodulated signal of the 2nd Harmonic receiver through the internal speaker or earphones.
• Features a high-contrast display for real-time signal analysis and probability readings.
• Integrated aluminium pole adjusts from 30cm to 140cm, allowing for the inspection of high ceilings or deep voids without additional ladders.
• The antenna head can be locked into five different positions over a 90-degree range.
• Supplied counterweights offset the weight of the antenna head when the pole is fully extended, reducing operator fatigue.

• Target Detection: All semiconductor electronics (Active, Passive, or Powered-off)
• 2nd Harmonic: (4.8 GHz): Identifies silicon/semiconductors
• 3rd Harmonic: (7.2 GHz): Identifies non-threatening oxidised/bi-metals
• Material Indicator: Intelligent visual feedback for ‘Silicon’ or ‘Metal’ probability
• Transmit Frequency: 2.4 GHz (ISM Band Type B)
• Power Output: High-intensity focused signal up to 4 Watts
• Sensitivity: Performance parity with larger, non-portable NLJD units
• Audio Tone Mode: Variable pitch based on signal strength for eyes-free sweeping
• Audio Demod Mode: Listen to actual demodulated signals from the 2nd Harmonic receiver
• Telescopic Reach: Adjustable aluminium extension pole (30cm to 140cm)
• Articulating Head: 5 lockable positions across a 90-degree arc
• Battery Type: Internal Lithium Polymer pack
• Battery Life: Up to 4.5 hours per charge
• Chassis: Precision-machined Aluminium Enclosure with a high-durability plastic antenna cover
• Device Weight: 900g
• Total Weight: 3.0 kg (Full kit in case)

• EDD-24XT Professional NLJD Semiconductor Detector
• Aluminium Extension Pole
• 2 x 200g Counterweights
• Charger – 110V to 240V AC input (Auto-switching) with International Adaptors
• Earphones
• High Protection Military Standard Carry Case
• Full Comprehensive Instruction manual