Non linear junction detector ST-401

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The non linear junction detector ST-401 is intended to detect and locate :
• eavesdropping electronics
• IEDs
• mobile phones and SIM cards
• any other devices utilising semiconductor technology.

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The non linear junction detector ST-401 is intended to detect and locate :
• eavesdropping electronics
• IEDs
• mobile phones and SIM cards
• any other devices utilising semiconductor technology.

ST-401 allows detecting electronic devices, whether active or not, as well as finding their exact location. It also enables one to distinguish between return signals from real semiconductors and other kind of responses, such as those coming back from corrosion or metal-oxide-metal structures.

The detection is indicated by both audio and visual informations.

ST-401 is a nonlinear junction detector (NLJD), instruments of this type employ active detection, i.e. they emit probing signals and analyse the return. An important advantage is a confident detection of search targets behind partially screening obstacles, which is achieved by simultaneously radiating several frequencies within the 2-3GHz band and analysing some composite picture of the reflection spectrum, rather than merely the 2nd and 3rd harmonics, as is done traditionally by other devices.

The ST 401 NLJD consists of an antenna module and a handle connected by way of a hinge joint. The antenna module comprises a receiver-transmitter unit, a control-display unit, and an aerial, all of which are assembled on a single platform and incorporated in a single body. The handle of ST 401 comprises a battery compartment, a control panel, and mechanical parts that form the bearing structure.

TECHNICAL DATA

Range of radiated frequencies : 2–3GHz
Max. peak radiated power : < 2W
Antenna polarisation : elliptic
Sensitivity range in manual mode : 40dB (5 values with 8dB increment)
Response indication :
– visual three 16-segment gauges
– aural internal speaker or headphones
Power supply : two 3.7V Li-ion batteries (type 18650)
Time of operation on one battery charge : 2–3 hours, depending on operation mode
Battery charging time : < 3 hrs
Operating conditions :
– working temperature range +5...+40°С
– relative air humidity up to 85 percent (at 25°С)
Weight (with batteries) : < 0.9kg
Dimensions when folded : 235 х 160 х 156 mm
Weight of full set in case : 3.7kg