NLJD 3HECA-02 Nonlinear Junction Detector with Screen and Third Harmonic

Discover and Neutralize Hidden Threats with the NLJD 3HECA-02

The NLJD 3HECA-02 is the evolution of the popular 3HECA-01: a nonlinear junction detector designed for security professionals and technical surveillance countermeasures (TSCM) teams who need to identify concealed electronic devices with maximum reliability. This improved version incorporates an integrated display with real-time visual feedback, a 3.5 mm headphone jack for discreet monitoring, and third harmonic detection , which reduces false positives and increases the accuracy of each inspection.

New features of the NLJD 3HECA-02 compared to the 3HECA-01

• Integrated display : real-time visual information on harmonic signals, to locate and identify junctions more quickly and accurately.
• Second and third harmonic detection : reliably distinguishes real electronic junctions from false positives such as corrosion, rust or metallic junctions.
• 3.5mm headphone output : Allows you to listen to the harmonic response privately, without alerting those nearby during a discreet inspection.
• Greater detection range : improves sensitivity and performance in complex environments.
• Lower consumption and greater autonomy : consumption less than 250 mA and up to 4 hours of continuous operation.

Main Features of the NLJD 3HECA-02

• Inactive Device Detection : Identifies electronic devices that are not emitting any signal or are disconnected from their power source.
• Efficient Detection Range : Detects SIM cards up to 100 mm (200 mm in the 4W version) and other electronic devices at greater distances.
• Circular Polarization Antenna : minimizes the risk of missing threats due to incorrect antenna polarization.
• Safe Frequency and Power : Operates in the 2.4 GHz ISM band with low transmission power (EIRP less than 500 mW), complying with the Short Range Devices standard (EN 300 440). Power adjustable in automatic or manual mode (4 steps of 3 dB).
• Automatic and Manual Power Adjustment : ensures flexible operation even in electromagnetically complex environments.
• Compact and Ergonomic Design : Telescopic mount with GoPro mount (0.27 m to 0.9 m) for comfortable and prolonged use.

How does the NLJD 3HECA-02 work?

The NLJD 3HECA-02 emits a radio frequency (RF) signal toward the inspection area. When this signal reaches a nonlinear junction—such as a semiconductor—harmonic signals are generated, which the device detects and analyzes. By analyzing the second and third harmonics , the device accurately differentiates genuine electronic components from false positives generated by metallic or oxidized junctions. This technology allows for the detection of devices even when they are powered off or disconnected.

Advantages over Conventional Detectors

Unlike traditional radio frequency detectors, the NLJD 3HECA-02 locates both active and passive devices, including those that are completely powered off or disconnected. This makes it an indispensable tool for discovering recorders, hidden cameras, SIM cards, and circuit boards that are not emitting active signals.

Technical Specifications of the NLJD 3HECA-02

• SIM card detection: up to 100 mm (200 mm in 4W version)
• Transmitter: pulsed mode, EIRP less than 500 mW (4000 mW in 4W version)
• Frequency: 2.4 GHz band compliant with the SRD standard (EN 300 440)
• Adjustable output power: automatic or manual (4 steps of 3 dB)
• Receiver: second harmonic (4.8 GHz) and third harmonic (7.2 GHz)
• Harmonic signal sensitivity: -135 dBm
• Antenna: Helical, Circular Polarization
• Alarm: Visual, Audible and Headphone
• Interface: Integrated display + 3.5 mm headphone jack
• Power supply: 2 rechargeable Li-ion or LiFePO4 batteries (AA size, type 14500), internal charging
• Current consumption: less than 250 mA
• Continuous operating time: up to 4 hours
• Temperature range: +5 °C to +40 °C (-10 °C to +50 °C during transport and storage)
• Main unit dimensions: 150 x 150 x 80 mm
• Telescopic mount: from 0.27 m to 0.9 m (GoPro mount)
• Weight: 350 g main unit with batteries + 120 g telescopic stand

Package Contents

• Nonlinear Junction Detector NLJD 3HECA-02
• Rechargeable battery pack
• Battery charger
• Telescopic mount with GoPro mount
• 3.5 mm Headphones
• User manual

Stay One Step Ahead with the NLJD 3HECA-02

Protect your environment with maximum precision. The new display, third harmonic detection, and headphone monitoring make the NLJD 3HECA-02 an essential tool for any security professional. Don't let hidden threats go unnoticed: rely on the NLJD 3HECA-02 to keep you one step ahead.