Cayman 401 (403)


Height 130 mm
Width 220 mm
Thickness 95 mm
Weight 0,85 kg (with battery)
Case Plastic
Power supply 12
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Non-linear junction detector Cayman ST-401 (403) is compact modification of base model ST-400 (402). Cayman 401 (403) supports all operation modes, applicable in base model 400. The key difference is lack of telescopic bar. This model is especially helpful when working in confined space, checking small cargo and mail, as well as inspection of people. ST-401 (403) allows detecting and precise localizing both working devices and even turned off ones. Using this non-linear junction detector operator is able to distinguish natural semiconductor from the artificial one (metal, corrosion, metal-oxide-metal structure). 

Competitive advantages:

Main distinctive feature of non-linear junction detectors CAYMAN is multifrequency irradiation mode, which provides wide range of advantages in front of detectors designed by the classic scheme:

·         increased selectivity (ability to distinguish electronic components with background of metal-oxide-metal structure);

·         increased probability of detection electronic devices behind partially shielded surfaces (such as the grid "netting");

·         optimal ratio of radiation power and detection range;

·         ability to identify detected objects in Audio mode;

·         high detection sensitivity at a low output power;

·         ability for effective operation in complicated interference environment (reinforced structures, corrosion, etc.).

Updated model has beneficial differences from the last modification:

·         modernized antenna, which increase detector selectivity;  

·         reduced weight and overall dimensions of the device;

·         simplified system of control and indication;

·         use of common power supply batteries;

·         more ergonomic design.

Additional features:

·         original signal processing algorithm enables to reduce false responses  and increase the selectivity as well as reaction speed;

·         software upgrade via USB;

·         detector is supplied in shockproof package.

Cayman 400 Technical Characteristics: 

Frequency range

2-3 GHz

The maximum radiated peak power

Less than 2W

Antenna polarization


Operating modes

“search”, “audio”, “adaptation”

The range of sensitivity adjustment in manual mode

40 dB (5 steps of 8 dB each)


- visual

three 16 LEDs bars

- audible

built-in speaker, headphones

Power supply

2 Li-ion rechargeable batteries 3,7V (18650 type)

Run time of a fully charged battery

2-3 hours (depending on the operating mode)

Charge time

not more than 3 hours

Operating conditions

- temperature

+5 ... +40 C

- humidity

not more than 85% (at 25 C)

weight with battery

0.85 kg

Dimentions when folded 
(lenght, width, height)

220x130x95 mm

Weight of the full set

up to 3.7 kg

Height 130 mm
Width 220 mm
Thickness 95 mm
Weight 0,85 kg (with battery)
Case Plastic
Power supply 12
Frequency band 2-3 GHz
Battery life 2-3 hours
Battery charging time up to 3 hours

Delivery set:



No. in Figure

ST 401 CAYMAN non-linear junction detector



Rechargeable battery 3,7V of type 18650



Power supply charger



Charging unit






Semiconductor simulator (red marking)



Metal-oxide-metal structure simulator (blue marking)



Operation manual


Transportation shockproof package




401 Delivery set.png

Please note: software upgrade can cause recorder’s breakdown. This is not a warranty case. All the new recorders have the latest software version and there is no necessity to upgrade software after buying the recorder. Don’t take the risk. In case there are problems with audio recorder operation please apply to our technical support specialist:

Software Firmware Manual to
Series manual Supplement to the model
ST 401 (403) Cayman Operating Manual Catalogue file Cayman
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