NON Linear Junction Dectector

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Non-Linear Junction Detector LUX

Professional Non-Linear Junction Detector


  • Police and law enforcement agencies, private investigators for counter surveillance bug cleaning and bug sweeping operations.
  • Organizations requiring Technical Surveillance Countermeasures (TSCM) Equipment for securing their environments from covert listening or eavesdropping transmission devices.
  • ACU-LUX Winner "Best Choice for Sweep Teams" at Milipol Paris.

    • TECHNOLOGY BASES: Based on the generation of microwave signal radiation, which when put in contact with transistors, diodes, or chips re-emits at certain higher frequencies. When bug sweeping the re-emitted signal is received on the antenna and processed showing the 2nd and 3rd harmonics on the LED indicators and heard via earphones.
    • LOW FREQUENCY 20K MODE: The LUX Surveillance Equipment Detector allows for listening of low frequency of detected devices such as tape recorders, radio, microphone amplifiers, and is a powerful tool in the identification of the type of non linear device (bug) being detected.
    • RESOLUTION: The resolution of each LED indicator is 3dB and the received signal can also be heard with the accompanying earphones.
    • AUTOMATIC SELECTION: The system automatically selects the best frequencies (not interfering with GSM range) allowing the surveillance bug detector to work in a concentrated environment.
    • ADJUSTABLE: The ACU-LUX Non Linear Junction Detector's transmitter power can be adjusted as well as the receivers sensitivity.
    • CAPABILITY: The radar operates in pulse mode with a radiated power of 16 watts per pulse, this allows for higher (-130ddBVt) sensitivity of the receivers. Therefor the ACU-LUX bug detector matches or exceeds the most powerful current Non Linear Junction Detectors (NLJD) available. This is achieved by optimising the parameters of the signal in conjunction with a superior antenna system.
    • UNIQUE DESIGN: Ergonomic and light (1.3 kg including battery) with extendable/retractable poll inside the handle for superior reach, also the surveillance equipment detector's innovative screw-in battery extends the handle further.
    • USAGE PARAMETERS: Operation speed, product safety, ergonomics, battery and continuous usage time (not less than 5 hours), the ACU-LUX Surveillance Equipment Detector exceeds all currently available Non Linear Junction Detectors.


    • Control unit is a transmitter and two multi-channel high sensitivity radio receivers which tunes to the 2nd and 3rd harmonics frequencies.
    • Key Function controls and LED Indicators are controlled via the control panel.
    • Uncluttered controls and high visibility of the indicators shows the ease of use of the unit.
    • The Surveillance Bug Detector tuning is assisted with two special NLJD imitators included in kit.



    • During bug sweeping operations the transmitter operates in pulsed mode in the range of 915 Mhz.
    • Step frequency tuning of 200 kHz.
    • Maximum output power per pulse 16 (plus or minus 1dB).
    • Minimum output pulse 1.6 dB.


    • Frequency setting of the bug detector's receiver = X 2, X3 frequency of transmitter respectively.
    • Sensitivity of each receiver Signal to Noise Ratio (SNR) at least 6 dB-136dB/Vt
    • Dynamic range of at least 30 dB.
    • Manual receiver gain, four stages of (10 dB) in each stage.
    • 20k Mode, transmitter emits signals modulated by the amplitude of the sequence of radio pulses. Demodulation width signal spectrum is 500-2000 Hz.


    • The ACU-LUX Non Linear Junction Detector has 3 Antennas, structured into a single unit.
    • Main lobe width of the directional characteristics receiving and transmitting = 90 degrees at -3 dB.
    • Transmitting and receiving antennae have circular polarization with an elliptical ratio up to 1.5
    • The transmitting and receiving of the surveillance bug detector's antennas are coaxial pattern, deviations maximum of the main lobe not exceeding 50.


    • ACU-LUX Non Linear Junction Detector Antenna (3in1) attached to Control Panel with extendable pole.
    • Detachable screw-in re-chargeable battery with external charger.
    • Headphones set.
    • Non Linear Junction Detector imitators for tuning.
    • Carry case.

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