ST-111 RF signal, GPS trackers and bugs detector

Listed in RF Detectors


ST-111 detector description:

ST-111 is designed for detecting and locating of radio transmitting bugging devices, such as:
  • GPS trackers while they transmit object coordinates to recipient;
  • GSM bugs;
  • Wireless, WiFi video cameras and covert surveillance devices;
  • Unauthorised WLAN and DECT devices.
The principle of ST 111 operation is based on broadband detection of electrical field ST 111 operates in two main modes: SEARCH and MONITOR. Additional modes include LOG COLLECTION, LOG VIEW, OSCILLOSCOPE and RECORDER.

ST-111 key features:

  • Separate indication of analogue and pulse signals;
  • Display and identification of GSM (2G), DECT, WLAN (2.4GHz) signals;
  • Frequency meter;
  • Oscilloscope;
  • Timing diagram;
  • Special software "ST110 ANALYZER" included with the delivery set;
  • 24/7 monitoring;
  • Log of events.

Features of included ST-111 analyser software for PC:

  • Time graphic display of data and the results of operation of the ST 111;
  • Full remote control from PC;
  • Extended settings assignment for MONITOR mode;
  • Load and display textual and graphical information of the operation of the ST 110 in MONITOR mode (Event Log);
  • Firmware updating over the internet.

Delivery set:

  • Main processing unit - 1pcs;
  • RF antenna - 1pcs;
  • USB cable - 1pcs;
  • Power supply and charger adapter - 1pcs;
  • USB flash drive with PC software - 1pcs;

Options, to be ordered separately:

  • Directional antenna;
  • Custom made, Pelican shockproof case.

ST-111 Search Mode

This mode is intended for search and detection of RD. Usage of this mode is based on visual estimation of the signal level on the 32-segmental scale. Additionally, a separate indication of continuous and pulse signals, identification signals of GSM, DECT, BLUETOOTH, WLAN standards and stable signal frequency are used.
The possibility of acoustic control by means of headphones is provided.
  1. A 32-segmental indicator of the average power of radio-frequency emission source (is pointed on continuous output radio transmitters).
  2. A 32-segmental indicator of impulse component level of the radio signal (is pointed on impulse radio transmitters, such as GSM, DECT etc.).
  3. The sensitivity of the indication scales («L» – low, «M» – medium, «H» – high).
  4. Frequency bands («B1», «B2») LOW PASS FILTER "LPF" ("F") /short-period indication of set zero scale level («ZERO»);
  5. Current value of impulse/constant component level, comparing with zero level, dB;
  6. Value of periodic signal frequency, MHz
  7. Identified data transfer standards (GSM, DECT, DECT BASE, BLUETOOTH or WLAN
  8. Change in time of signal level with dominant constant component
  9. Change in time of signal level with dominant impulse component
  10. Current value zero level of impulse/constant component, dB
 ST-111 Bugs Trackers SEARCH Location mode

ST-111 RF monitoring mode

This mode is designed for independent operation of ST110 on preset conditions. The information about detected
signals are saved by means of a non-volatile memory of the device (9 banks, each for 999 events).
Scheduled work operation is also provided.
  1. Indicators of RF transmitter signal level
  2. Graphic labels of alarm threshold levels
  3. Sign of no permission for recording in EVENT LOG
  4. 5-second interval countdown
  5. Current value of impulse/constant signal component level, comparing with absolute level, dB
  6. Value of the alarm threshold levels of impulse/constant signal, dB
ST-111 Monitoring and log view mode

ST-111 Event log view mode

This mode is intended for viewing the log of events taking place in the result of the unit running in MONITOR mode.The classification of the events by time, duration or value of the signal level is provided.
  1. Number of viewed bank /Number of banks in action
  2. Number of viewed event/Number of events in bank
  3. Frequency range, in which the alarm happened (B1: 50-2500 MHz, B2: 2500-7000 MHz).
  4. 5-second interval countdown
  5. Signal properties in the moment of alarm threshold excess
ST-111 Events Log

ST-111 Oscilloscope mode

This mode shows detected signal oscillogram.
  1. Type of configuration (A - automatic M - manual) and the relative value of vertical trace(from 1 to 7)
  2. Oscillogram
  3. Value of horizontal trace in conversion to full-screen values (1, 2, 4, 8, 16 and 32 ms)
ST-111 Osciloscope mode

ST-111 technical characteristics:

Frequency range No. 1, MHz 50-2500
Frequency range No. 2, MHz 2500 - 7000
Threshold sensitivity, dBm
-75 (50 МHz)
-70 (1500 МHz)
-50 (2500 МHz)
Threshold sensitivity, W/cm2 2x10-10
Dynamic Range of indication
-range No. 1, dB
-range No. 2, dB
Frequency range of frequency meter, MHz 50-2500
Sensitivity of frequency meter, dBm
-35 (50 МHz)
-50 (500 МHz)
-20 (2500 МHz)
Frequency measurements accuracy, % 0.005
Built-in power supply battery Li-pol 3.6V
Consumption current, max, mА 110
Dimensions, mm 90 x 54 x 21
Gross weight, kg 0.25