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Expose hidden electronics—no power, no RF signal required
Our selection of non-linear junction detectors (NLJDs) lets counter-surveillance teams, prison officers and VIP-protection units locate covert phones, recorders and tracking chips even when they are switched off or shielded. By analysing a harmonic echo unique to semiconductor junctions, these instruments confirm the presence of electronics before they can leak data or coordinate an attack.
A silicon junction behaves like a one-way electrical valve. When struck by a coded microwave burst, it re-radiates energy at precise multiples—harmonics—of the probe frequency. Ordinary metal reflects the original carrier with almost no harmonic content; semiconductor chips emit a strong third harmonic. An NLJD transmits, then “listens” on harmonic channels, highlighting even powered-down devices hidden behind walls, inside furniture or deep in vehicle panels.
Core Advantages
Silent-device detection – finds electronics that produce no RF emissions. Non-destructive sweeps – no dismantling, drilling or X-ray exposure. Universal targets – detects SIM cards, flash drives, microphones, GPS beacons and custom circuitry. Rapid deployment – warms up in seconds and delivers visual or haptic feedback instantly.
Operational Workflow
A systematic sweep starts along perimeter walls, continues across floors and ceilings, then inspects free-standing objects. The probe is kept 10–15 cm from any surface and moved at roughly one metre per second with 50 % overlap to avoid blind strips. Output levels stay far below ICNIRP limits, ensuring safety for people, data and implants. When a harmonic spike appears, operators confirm by tilting the antenna, reducing power in 3 dB steps and verifying that the third-harmonic trace rises consistently—a signature behaviour of genuine electronics.
Typical Applications
Government offices – verify that conference rooms are free of dormant listening devices before classified briefings. Correctional facilities – locate powered-off smartphones cemented into cell walls. VIP travel security – clear hotel rooms, vehicles and baggage within minutes of arrival. Vehicle inspections – expose passive trackers in bumpers, dashboards and seat backs. Customs cargo – confirm export crates contain no embedded location beacons or tamper sensors.
Frequently Asked Questions
Is NLJD radiation safe? Yes. Peak power is far below consumer Wi-Fi levels and will not disturb electronics or endanger people.
Can an NLJD see through solid metal? No. Steel reflects the probe. Operators scan at seams, vents or adjacent non-metal surfaces to reach concealed areas.
Will multiple detectors interfere? Professional units use coded pulses, so several can operate side by side without crosstalk.
How much training is required? Basic technique is mastered in one day; a three-day OEM course covers advanced filtering and documentation.
Regulatory & Calibration Notes
NLJDs fall under EU Dual-Use category 6A008; exporting or moving them across borders requires an end-user certificate. Annual calibration against a certified junction tile keeps sensitivity within specification and protects evidential value in court.
Expose Hidden Electronics—Before They Expose You
When a silent handset or recorder could compromise security, non-linear junction detection provides the decisive safeguard. Equip your team with this harmonic-analysis technology and complete every sweep confident that no covert device remains.
Attention! We have switched to a new store engine!
Our online store switched to a new IT infrastucture on July 1, 2023. Old accounts created before 01.07.2023 still work and you can easily log in using your old access data. However, your purchase history from before 01.07.2023 is no longer visible in your accounts. If, as an old customer, you need your data for previous orders (placed before 01.07.2023), please contact us by email.