Talisker Non Linear Junction Detectors (NLJD)

2mW-2W

Winkelmann (UK) Ltd

http://www.winkelmann.co.uk/hawk.htm

Non-Linear Junction Detectors (NLJD's) have been used in Counter Surveillance (TSCM) for many years and were introduced in the mid 1980s for the detection of hidden electronic circuits.
Countermeasure searches can be monotonous, repetitive and stressful in certain environments; non linear junction detection is an extremely powerful search technique in addition to normal physical search procedures. An NLJD will detect and locate any electronic device regardless of whether or not the device is powered.

Robust, light weight, fibre glass and carbon design, operational weight less than 2kg
Continuous wave transmission (CW) reduces the risk of missing a threat, CW is also the preferred method in EOD applications
Highly sensitive receivers with excellent signal-to-noise ratio
High transmit power, variable from 2mW up to 1W (2W optional)
Balanced, ergonomic design with integrated display module
Unique 4-way thumb control, placed conveniently on display screen, for most commonly used functions
4 selectable operating frequencies to avoid possible interference from local transmissions
Circular polarized antenna removes risk of missing a threat due to incorrect polarization
Revolutionary design, "all in one" single body unit with option of antenna separated from control module

Top Tip

When using an NLJD false positives (alarms) can be caused when 2 pieces of metal such as nails are very close together. When this occurs in a wall or piece of furniture where you wouldn't expect a return, have a strong signal on the NLJD and tap the area/item with a mallet. If the signal isn't caused by a non linear junction the signal will either disappear or have a momentary blip. In order to reduce collateral damage and unsightly black marks a white rubber mallet is recommended. We accept no blame for any damage caused using this technique!

SuperBroom Advanced
	Audiotel International	http://www.audiotel-support.com/site/advanced.shtml
SuperBroom Advanced is a portable simple to use advanced non-linear junction detector that discriminates between electronic targets and innocent return signals. Radiating a spectrally pure signal SuperBroom Advanced detects the second and third harmonic return signals re-radiated by non-linear junctions (NLJs) found in all semiconductors such as diodes and transistors. Automatic Power adjustment mode prevents saturation of targets and coupled with high sensitivity and sophisticated Digital Signal Processing (DSP) gives superior detection range and resolution. Designed for the security professional SuperBroom Advanced is simple to use providing easy and user friendly operation to detect active, dormant or non-operational electronic devices. SuperBroom Advanced is an indispensable tool wherever there is a need to locate electronic devices

DetectIV
	Audiotel International	http://www.audiotel-support.com/site/detect.shtml
The introduction of DetectIV marks the beginning of effective electronic bug detection becoming a general everyday security task rather than a specialist activity carried out by highly trained operatives with an excess of equipment. Audiotel have taken four main detection technologies and integrated them into one compact, hand-held, easy-to-use tool. Each of the detectors operates in sequence five times a second effectively giving real-time continuous display of activity for each detector. Each of the sensors covers a different type of threat such that, a suspicious device that may be missed by one type of sensor is picked up by one or more of the other sensors. In performing a single physical sweep of an area DetectIV effectively carries out four separate searches. By combining and presenting information from the sensors in a clear and simple manner DetectIV allows non-technical operators to make effective sweeps of an area to find any concealed listening device.

ORION

Research Electronics International

http://www.reiusa.net/cgi-bin/main.cgi?action=viewprod&ct=products&num=NJE-4000

ORION (The Great Hunter) provides the capability to detect hidden electronic devices, regardless of whether the device is radiating, hard wired, or even turned on at all! ORION is the latest advancement in Non-linear Junction Detection and evaluation for Countersurveillance.

Minimum Set-up Time, no cables or bulky transceiver units to carry
Light weight, balanced ergonomic design for ease of use
High Transmit power for rapidly searching a large area
Circularly Polarized Antenna reduces search time and improves reliability
Dual Harmonic with Discrimination Algorithms Minimizes False Alarms
Standard type camcorder battery with long use time and quick charge function
Wireless Headphones and Graphic Display for simultaneous Audio & Visual Information

SCG-Eclipse
	Surveillance Consulting Group 2003	http://www.surveillance-consult.com/describeProduct.php?pro_id=34
ECLIPSE is designed to detect various kinds of electronic devices containing semiconductor elements, such as eavesdropping devices, microphone amplifiers, audio-recording devices, remote control devices etc., both in switched-on and switched-off modes. A non linear junction detector locates potential eavesdropping devices by flooding a suspect area or target with a spectrally pure microwave RF signal. The relative strength of second and third harmonic returned being reflected by non-linear junctions varies depending on the construction material of the junction. Metallic junctions return a greater relative 3rd harmonic signal than semiconductors junctions. Semiconductors junctions return a greater relative 2nd harmonic signal than metal oxides. By comparing the relative strengths of the two harmonics ECLIPSE gives the operator a clearer indication of the source of any reflected signal.

Boomerang4

Information Security Associates

http://www.isa-tscm.com/Boomerang.html

Transistors, diodes and integrated circuits all contain nonlinear diode junctions that create the actual semiconductor device. The BOOMERANG^{4 ™}Nonlinear Junction Detector will find these components used in surveillance transmitters (audio and video), hidden microphones, infrared and ultrasonic transmitters tape recorders and other covert eavesdropping devices hidden in walls, ceilings, bookcases, plants, furniture, etc.
The BOOMERANG⁴is simple to use and extremely accurate. Its antenna is skimmed over the surface being swept. Most electronic circuits can be detected for several feet even through dense material.
BOOMERANG^{4 ™} detects two different types of harmonic signals, displaying the difference between an actual bug and a false return caused by dissimilar metals.
Semiconductor components primarily radiate a frequency that is two times that of the signal from BOOMERANG⁴'s transmitter. This signal is called the second harmonic. Upwards of 90% of the signal radiated by a semiconductor is second harmonic.
Dissimilar metals not used in semiconductors radiate a significant quantity of a signal that is three times that of the BOOMERANG⁴'s transmitter. This is called the third harmonic.
The BOOMERANG⁴'s antenna mounted display shows the level of both signals. The operator simply visually compares the levels of second and third harmonics on the LED bargraph meters to instantly determine whether a bug or a false return has been detected

NJD-4 BOOMERANG^{4 ™} is an FCC type approved model vailable in a low power configuration (100 milliwatt). The NJD-4 is recommended for use by civilian groups within the United States.
NJD-5 BOOMERANG^{4 ™} is a high power unit, available to US federal government groups and for use outside of the United States. The NJD-5 has a 500 milliwatt transmitter for greater detection range especially in dense materials. The NJD-5 also has an integral multistep attenuator to allow the user to control the actual detection range by lowering the transmitter output.

LOCATOR XD
2-500mW	Shearwater ECM	http://www.shearwaterecm.com/locator.htm
This is the latest version of the LOCATOR series of Non Linear Junction Detectors. It is a Third Harmonic Junction Detector, a very important facility for discriminating between false and real targets. This unit also has the ability to select the transmit frequency. In addition to the customary “Geiger” audio, AM and FM demodulation modes are provided. Those familiar with this type of equipment will also greatly appreciate the weight, only 2.24 kg, including the antenna and battery.

RFD 23
	BAHIA 21 Corporation	http://www.bahia21.com/human.php#rfd
RFD 23 is a hand-held Non Linear Junction Detector designed to locate explosive devices by searching and detecting their electronics (trigger, remote control) High power pulse for detection at greater distance Uses 2nd and 3rd harmonics to differentiate electronic components Lightweight (15 kg)

Last page update: 06 Sep 2007