MEL 6 JOLA threshold electrode

Description

The MEL 6 JOLA threshold electrode is designed to detect leakage of electrically conductive fluid in a tubing channel.

The threshold electrodes are designed to signal the presence of an electrically conductive fluid, caused for example by burst pipes, via a connected conductive electrode relay.

The mat electrodes must only be used in normally dry environments. They can be installed on the floor or in a sump under pipelines or small tanks.

The electrode is equipped with 6 sensitive elements in the form of 6 sensor cables: 3 control electrodes and 3 ground electrodes. The earth electrode is always placed next to the control electrode, the control electrode next to the earth electrode, etc. As soon as an electrically conductive liquid (e.g. water, acid, etc.) creates a conductive path between the control electrode and the earth electrode, a control current flows from the corresponding relay of the conductive electrode. The latter is then energised and contact is established.

The 6 sensor cables of the MEL 6 … mat electrode in the form of 6 stainless steel ropes are woven into an approximately 30 cm wide polyester fabric as part of the base and the polyester fabric keeps them at the same distance. This polyester fabric is designed to prevent stainless steel ropes from coming into contact with each other or with an electrically conductive surface (e.g. steel tub, steel pipe, etc.), thus avoiding false alarms as much as possible, while allowing liquid to seep through.

To avoid false alarms, it is essential that the surrounding area of the electrode is completely dry under normal circumstances, as matt electrodes have the ability to bind moisture (including high levels of air humidity), causing false alarms, especially with long matt electrodes.

Before use, we recommend viewing the attached pdf documents under the Documentation tab.

Features of MEL 6

• Design: 3 control electrodes and 3 earth electrodes
• Sensitive element: 6 sensor cables in the form of 6 ropes of 316 stainless steel, each 1,5 mm diameter, woven into a polyester fabric mat approximately 300 mm wide at a spacing of approximately 50 mm, PVC sensor mat end units 2 m long, shorter or longer on request, with polyester braid, with plug connector, sleeve and fixing clip 2 m long, shorter or longer on request
• cable length: max. 10 m
• electrical connection: connecting cable 2×0.75 length:2m, on request: longer, without halogen
• temperature range: -20 °C to +60 °C (higher temperatures on request)
• cable break control: none
• Classification:
  • Leckstar 5 or Leckstar 5/G: any number of MEL 6 can be connected in parallel to one of these relays.
• Connecting cable length: 1,000 m between the relay electrode and the mat electrode minus 3 x the length of the mat electrode

For more information, please see the attached pdf documents under the Documentation tab.

Examples of use

• Use of a threshold electrode to detect leakage of an electrically conductive liquid in a sump

Welcome to the article ”Conductive Measurement of Liquids”