Write us

FAGUS-GRECON Greten GmbH & Co. KGHannoversche Straße 58
31061 Alfeld

To contact form

How to reach us

Enter your search term and confirm with the Return key.

Spark Detector FM 3/8 with Fibre Optic Cables

Spark detection in high-temperature areas

FM  3/8  sensors  with  fi bre  optic  cables  are  used where  processing  or  drying  temperatures  exceed 600  °C  (1112  °F).  Three  separate  stainless  steel covered glass fi bre cables transmit the infrared radiation to the sensor, with each cable ending on a separate  photo  optic  diode.  Solid  glass  adapters are added to the cable end for extremely high temperatures. Detection reliability is achieved by using three detection elements per sensor. The fibre optic cables are available in  different lengths for different duct diameters.

Technical Specification

Technical Specification

In a brief

Highly sensitive detector to detect sparks as well as hot and glowing particles in pneumatic and mechanical conveying facilities in connection with GreCon fibre optic cables in case of high material temperatures.


Supply voltage range: 18 V to 22 V DC
Current drawan at 20 V: 10 mA ± 1 mA
Spectral sensitivity: 780 nm to 1100 nm
Temperature range, environment: -40 °C to +70 °C
Ambient temperature in the material flow: up to + 600 °C at the lens
Relative atmospheric humidity: 0 to 95 %, non-condensing
Transportation speed: 2 to 50 m/s (other speeds on demand)
Use: in non-explosive areas, in areas without daylight and artificial light
Connection: ready-to-use connecting cable, plug-in, cable length 2.5 m (3 x 0.5 mm²) optionally 25 m (3 x 0.5 mm²)
Material of housing: aluminium die casting (GD-AlSi12)
Degree of protection: IP 65
Connection: pre-fitted connecting cable, pluggable: cable length 2.5 m (3 x 0.5 mm²) optionally 25 m (3 x 0.5 mm²)
Housing dimensions: 84 x 84 x 31 mm
Housing colour: red (RAL 3000), lacquered
Weight: 490 g (excluding connecting cable)
Available mounting adapters: Screw-in mounting adapter FM 3/8 Ex, Weld-on mounting adapter FM 3/8 Ex, Purge air adapter SPA and SPA Ex

Air purge adapter

If dirt accumulation or other build-up on the sensor optics is expected, special air purge adapters increase the detection reliability. Cleaning intervals are thus extended. 

Do you have questions?

We are happy to help you with our service box
Telephone, in writing, or in person.

To the contact

Top Events