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Basic Countermeasures Equipment

2047 Ultrasonic/Contact


The 2047U/C combines the features of the 4020 standard stethoscope - with those of an ultrasonic (sounds higher in frequency than the ear can hear) detector. Many watches and clocks generate a considerable amount of ultrasonic energy which will travel a great distance if unobstructed. If the watch or clock can be "seen" by the ultrasonic probe, detection ranges on the order of 1 to 20 feet are not uncommon. The ultrasonic probe is highly directional so it tunes out background noise. The system consists of an amplifier/detector assembly (measures 1x3x5 inches), contact probe, ultrasonic probe, and headset, carrying case. The amplifier/detector is powered by a single 9-volt battery.

A 20-foot contact probe extension cable, 20-foot ultrasonic probe extension cable, recorder cable and other accessories are also available by special request.

The 2047 is a pocket sized high gain, low noise amplifier which combines a standard electronic stethoscope with those of an ultrasonic detector. The ultrasonic probe is highly directional and tunes out background noise.

The 2047U/C also does an excellent job locating video cameras, hidden tape recorders, and video tape recorders.

Executive protection agents and bodyguards frequently use the 2047U/C to detect hidden tape recorders, video recorders, cam-corders, and other cameras. This is accomplished by concealing the ultrasonic probe in the sleeve and covertly sweeping a suspect item or person to determine covert eavesdropping devices. The contact probe is then used to further explore potential threats. The 2047U/C is commonly used along with a 2060LV RF detector.

The 2047U/C is designed to detect conducted surface vibrations in the audible range as well as airborne sounds in the ultrasonic (above normal hearing) range of 35 to 45 kilohertz (KHz). The unit is supplied with amplifier/detector assembly, contact transducer/ probe (SILVER), ultrasonic transducer (BLUE), special 2,000 ohm headset and carrying case. The unit is designed specifically to be used with the high impedance headset supplied and not low impedance (8-32 ohm) headsets.

TO OPERATE AS A STANDARD STETHOSCOPE: Insert the contact probe (SILVER) into the CONTACT PROBE jack. NOTE: There are three (3) jacks of the same physical type on the unit, be careful not to confuse one with the other. Place the YELLOW switch in the CONTACT-DOWN position. Insert the headset into the HEADSET jack. The headset is worn with the gray tube under the chin with the sound output holes facing slightly forward (30 degrees). Place the probe on the desired surface and adjust the VOLUME accordingly.

TO OPERATE AS ULTRASONIC STETHOSCOPE: Screw the ultrasonic probe (BLUE) onto the ULTRASONIC PROBE connector. Make sure the connection is firm but not over-tightened. Place the YELLOW switch in the ULTRASONIC-UP position. Point the open end of the probe at a mechanical clock or watch (source of ultrasonic sound) and adjust the VOLUME. Bear in wind that ultrasonic energy will travel considerable distances if unobstructed. A single sheet of paper, for example, will effectively block ultrasonic energy from reaching the probe. The ultrasonic probe can be tested by having someone tear a sheet of paper 20 to 30 feet from the probe. The sound should be heard clearly.

The unit has a RECORDER output jack which provides line level audio into 10,000 ohms. This jack is run to the AUX (AUXILIARY) input on a tape recorder.

The 2047U/C is powered by a single standard 9 volt battery (Alkaline always preferred) which will provide an approximate total of 70 hours ON time. To replace the battery, loosen the two silver screws on the sides of the unit one or two turns. Carefully lift off the back cover, remove the old battery (noting its position), replace it with a fresh battery and replace the back cover. Be careful not to pinch the battery connector leads with the back cover. Tighten the two screws but don't over-tighten. Remove the battery during prolonged periods of storage. As with any piece of sophisticated electronic equipment, do not store the 2047U/C in extreme heat or humidity.

NOTE: Television sets generate frequencies which fall into the detection range of the ultrasonic probe, therefore, do not operate the 2047U/C within 100 feet or an operating TV set, monitor, or computer display.

Advanced TSCM Signals Detection and Analysis
TSCM - Sweeping the Spectrum for Eavesdropping Devices

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