Cayman ST-402 Non-Linear Junction Detector

The Cayman ST-402 non-linear junction detector locates concealed electronics by transmitting RF energy and analysing harmonic responses from semiconductor junctions. It supports close-in localisation with manual sensitivity steps, provides visual LED bar feedback with audio monitoring, and uses a telescopic bar for extended reach during technical security sweeps of rooms, furniture, parcels, and structural elements.

Key Features & Benefits

• Non-linear detection: Identifies semiconductor junctions to reveal hidden electronics behind surfaces and inside objects.
• Active or dormant devices: Detects powered and powered-off recorders, cameras, trackers, and other circuits.
• Precision control: Manual sensitivity adjustment in stepped increments helps pinpoint exact locations.
• Dual feedback: Visual LED bars with audio monitoring improve interpretation in both quiet and noisy areas.
• Ergonomic reach: Telescopic bar with armrest supports extended, stable sweeps during long sessions.
• Interference resistant: Designed to maintain reliable operation in challenging RF environments.

Where It’s Used

Apply the ST-402 to screen offices, hotels, meeting rooms, mail and parcel lines, vehicles, and furnishings when visual or RF-only checks are insufficient. Sweep walls, ceilings, fixtures, and containers to isolate harmonic responses and confirm likely electronic targets.

Technical Specifications

• Frequency Range: 2-3GHz
• Maximum Peak Power: Less than 2W
• Antenna: Elliptic
• Operation Modes: "Search", "Audio", "Adaptation
• Sensitivity Adjustment Range(Manual): 40dB (5 Steps of 8dB per adjustment)
• Visual Indication: Three 16 LED Bars
• Audible Indication: Built-in Speaker, and Headphones
• Power Supply: Two Lithium ION Rechargeable Batteries (18650mAH) 3,7V
• Battery-Life: 3-4 Hours (Full Charge - Depending on Operation Mode)
• Charge Time: ~3 Hours
• Dimensions (Fully Expanded): 1500mm x 250mm x 130mm (L*W*H)
• Weight of the Detector: 1.75kg
• Extended Runtime: Up to 8 Hours with Additional Batteries
• Transport Case: Shock-proof Case Included

Packaging Contents

• 1 x Cayman ST-402 Detector
• 4 x Lithium ION Rechargeable Batteries 18650mAh
• 1 x Charging Unit
• 1 x Charger Cable
• 1 x Headphones
• 2 x Test Targets
• 1 x User Manual / User Guide
• 1 x Transportation Shock-proof Case

Frequently Asked Questions (FAQ)

Can it detect electronics that are switched off?

Yes. NLJD technology reads harmonic responses from semiconductor junctions, allowing detection of powered and unpowered devices.

How do I pinpoint the exact location?

Follow rising LED bars and audio level, then reduce sensitivity step by step to narrow the peak response as you move the probe.

What environments is it suitable for?

Use in rooms, furnishings, parcels, and structural elements where electronics may be concealed and visual inspection is limited.

What is the typical operating time?

Battery life is 3–4 hours per full charge, depending on the selected operating mode.

Legal Disclaimer

Recording and surveillance laws vary by state and territory. Please check your local requirements, obtain consent where necessary, and use this device only for lawful purposes. This information does not constitute legal advice.

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