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Leak Detection Systems Overview
Operating Principles of Leak Detection Systems
Container Design
Liquid / Gas Medium

   General Design Permit (DIBT) No. Z-65.22-2 (Tested by TÜV Nord, Hamburg)
   Article No.: 4121 0030 (Basic Unit)

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  • The leak detector can be used on double-walled tanks according to DIN EN 12285-1 (DIN 6608 Part 2), DIN EN 12285-2 (DIN 6616 Form A), DIN 6618 part 2/4, DIN 6619 Part 2, DIN 6623 Part 2 and DIN 6624 Part 2.
  • DIN 6608 Part 2 containers that were previously monitored by liquid leakage can be monitored with this vacuum leak detector after extracting a specified volume.
  • The leak detector can also be used to monitor single-walled tanks with a leak protection lining, if it is approved for the values noted below.
  • For monitoring of water-polluting liquids and flammable liquids with a flash point > 55°C.
  • The storage medium may only have the density allowed for the container type.

The leak detector must be mounted outside the hazardous area (ex-zone)!

  • Leak detector on the vacuum principle, with integrated pump.
  • The vacuum pump evacuates air from the interstitial space and blows it through the exhaust pipe to the exhaust valve of the container.
  • Based on the set switching values a trigger switch mounted on the measuring line controls: Pump ON / OFF, Alarm ON / OFF.

Operating vacuum:
in the interstitial space
max. -450 mbar +/- 15 mbar

Switching values: relative pressure 
Alarm ON PAE = -325 mbar +0/-30 mbar
Pump OFF PPA = -450 mbar +/-15 mbar

For further data please see the data sheet of the "VAKUMATIK III F" leak detector.

Operating Conditions
  • The media list in the technical description must be observed.
  • The leak protection lining in single-walled tanks must have a general building approval (certificate earlier).
  • The max. viscosity allowed for the corresponding application must be observed. - For example DIN EN 12285: max. 5 × 10-3 m2/s.

  • Installation of a potential free relay.
  • Installation in protective casing, with external heating and alarm.
  • Mounting Kits (MBS) for the corresponding container ports.

Mounting Examples

Please click on the picture for a larger view!

Picture a

Advantages of the new design of the ASF leak detection systemsAdvantages of the new design of the ASF leak detection systems

Product Images

Leak Detector Type III F R325- Vacuum Principle
Leak Detector Type III F R325- Vacuum Principle,
featuring the new improved design.

Previous Modell of Leak Detector Type III F - Vacuum Principle - Mounted in protective casing
Previous Modell of Leak Detector Type III F - Vacuum Principle - Mounted in protective casing

Technical Description III F R325Technical Description III F R325
General Design Permit (DIBT)General Design Permit (DIBT)
III F R325 AccessoriesIII F R325 Accessories
Assembly Kit For Type III F R325Assembly Kit For Type III F R325
Assembly Kits And AccessoriesAssembly Kits And Accessories


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