Made in Germany   Made in Germany   Detection Technologies since 1998

We don't manufacture this product anymore.

FS-Reflexion - Seismic detector

With the geophysical measurement methods of seismics underground structures like cavities can be explored. During that active procedure vibrations will be generated and transmitted into the ground. Resulting from that process reflexions, travel time and vibrations can be recorded. According to the soil conditions the measured data gives clues to hidden objects.

FS-Reflexion is a geophysical measuring instrument to locate subterranean voids like caves, bunkers, tunnels or basement vaults. FS-Reflexion works with a seismic vibration system. A transmitter generates vibrations going into the ground. Depending on the type of soil they will be transmitted or damped. If a void exists it will start to resonate in its own frequency and can be detected by a seismic vibration transducer. FS-Reflexion can be used all around the world, no matter if there is stony ground, loam or clay soil, in the mountains or in flat country.

FS-Reflexion includes different operating modes to record and analyse data:

  • Check Mode to recognize seismic disturbances
  • Scan Mode to record measurement values for a graphical representation
  • Frequency-energy-graph to analyse seismic activities
  • Data transfer to computer for graphical representation in 3D
Certification Labels
Certified German Detection TechnologyView Certificate

Certified German Detection Technology

View Certificate

Data transmission via USB

Data transmission via USB

Compliance with CE policies

Compliance with CE policies

The recorded measurement values can be analysed via the frequency-energy-graph. In this diagram a high amplitude at specific frequencies indicates existing subterranean voids. Additionally it is possible to summarize all measurement values to a 3D representation, so that they can be analysed in the professional Visualizer 3D software. In that way voids cannot only be represented visually, but also their size can be determined.

Representation of measured values in the frequency-energy-chart
Representation of a cavity in Visualizer 3D

  FS-Reflexion - User's Manual (english)
  FS-Reflexion - Benutzerhandbuch (deutsch)

In the following table you can see the complete delivery contents and all optional accessories. The used symbols have the following signification:

x times includedx = x times included
not included = not included
optional available, only for additional charge = optional available, only for additional charge
3D software ( "Visualizer 3D" ) with data cableYes1
Charger for transmitterYes1
Control unitYes1
Platy positionerYes1
Power Pack incl. charger and travel adapterYes1
Spiky positionerYes1
User's manualYes1
Vibration transducerYes1
Waterproof and shock resistant Peli caseYes1

The following technical indications are medial values. During operation small variations are quite possible.

Control unit with seismic vibration transducer

Dimensions (W x D x H)
22 x 30 x 22 cm
about 3 kg
12 VDC ±10 %
Operating Temperature
0 °C – 45 °C
Storage Temperature
-20 °C – 60 °C
Air Humidity
5 % – 75 %
Power consumption (typical)
approx. 12 W
Effective range
4 – 22 Hz (via vibration transducer)
AMD LX800, 500 MHz
256 MB RAM, 128 MB data
Vibration transducer
seismic, piezo system


12 VDC, internal batteries
Output power (maximal)
150 W
Operating Temperature
0 °C – 45 °C
Frequency (internal control)
4 – 22 Hz

Data transmission (USB)

Maximum Transfer Rate
19200 Baud

Data transmission (Bluetooth)

2.4 – 2.4835 GHz
Maximum Transfer Rate
1 Mbps
Receiving Sensitivity
-85 dBm
Maximum Range
approx. 100 m

Computer, minimum requirements

CD-ROM drive
minimum 4x
Interface (Data transmission)
Free disk space
minimum 50 MB
Working memory (RAM)
minimum 256 MB
Graphic card
minimum 128 MB, OpenGL-compatible
minimum 1.2 GHz
Operating system
Windows Vista, Windows 7, Windows 8, Windows 10

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