Name: Cayman ST-402 Non-Linear Junction Detector, 1.5 Metre Reach
Brand: VIMEL
SKU: CAYMAN-ST-402
Price: 17900.0 NZD
Availability: InStock

Cayman ST-402 Non-Linear Junction Detector, 1.5 Metre Reach

$17,900.00 NZD

Quantity

Key Specs

Detection Type

Non-linear junction, harmonic

Frequency Range

2 to 3 GHz

Reach

Telescopic to 1500 mm

Display

Three 16 LED bars

Battery

4 x 18650, up to 8 hours

Weight

1.75 kg

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Description

The Cayman ST-402 is the extended-reach version. Same 2 to 3GHz transmitter and same harmonic detection as the ST-401, on a telescopic bar that opens out to 1500mm.

That difference matters for ceilings, high shelving, wall cavities and the parts of a vehicle nobody can reach from a comfortable position. Three operating modes, 40 dB of manual sensitivity in five 8 dB steps, three 16 LED bars with speaker and headphone audio. Two 18650 cells give three to four hours, with four supplied, taking it to about eight hours on a full set. It weighs 1.75kg and ships in a shock-proof case.

Features

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.

Applications

Real-World Scenarios

Ceilings, Voids And High Fittings

Anything above head height is where a short instrument runs out and where an inspection quietly stops being complete.

Extended to 1500mm, the bar reaches ceiling tiles, cornices, high shelving and the tops of cabinets without a ladder, which is what keeps the sweep consistent rather than selective.

A Vehicle Inspection

Under a dashboard, behind trim, inside a wheel arch, into a boot well: the awkward geometry is the whole problem.

The telescopic bar puts the antenna where the operator cannot go, and the LED bars and headphone audio are readable at arm's length. Stepping sensitivity down 8 dB at a time is how you separate a genuine response from the vehicle's own electronics.

A Long Inspection Day

Four 18650 cells ship with the instrument, and the specification puts the extended runtime at up to eight hours on a full set.

Three to four hours is one session. Eight is a working day across several rooms or several vehicles without stopping to charge.

How it Works

Confirm the instrument against a supplied test target, then extend the telescopic bar to suit the surface you are working, out to 1500mm.
Sweep in Search mode watching the three 16 LED bars, using Adaptation mode to settle the instrument against the site's background first.
As the response rises, step sensitivity down through the 40 dB range in 8 dB increments and move to Audio mode with headphones for the final localisation.

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

Frequently Asked Questions

How is this different from the ST-401?

The transmitter, the harmonic detection, the modes, the sensitivity range and the indicators are the same. The ST-402 adds the telescopic bar, extending to 1500mm fully expanded, and weighs 1.75kg against 1.3kg. Choose it when reach matters.

Can it detect electronics that are switched off?

Yes. It reads harmonic responses from semiconductor junctions, which exist whether or not the device is powered or transmitting.

How do I pinpoint an exact location?

Follow the rising LED bars and audio level, then step the sensitivity down 8 dB at a time. Each step shortens the effective range, so only a genuinely close source keeps the reading up.

What is the real operating time?

Three to four hours per full charge depending on mode. Four 18650 cells are supplied and the specification gives up to eight hours on the full set.

What ships with it?

Four 18650 rechargeable cells, a charging unit and cable, headphones, two test targets, the manual and a shock-proof transport case.

Who is this equipment for?

Technical surveillance countermeasures practitioners, corporate security teams and facilities that run their own inspection programmes. A non-linear junction detector is an operator-dependent instrument: results depend on technique, on knowing what a false response from a corroded joint looks like, and on interpreting harmonic ratios. It is not a plug-in-and-scan device.

Does it replace an RF detector?

No, they answer different questions. An RF detector finds what is transmitting now. An NLJD finds semiconductor junctions whether or not anything is powered, which is how a dormant or switched-off device is found. A full sweep uses both.