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6
4 Functions and features
The unit continuously detects the level of liquids in tanks and generates output
signals according to the parameter settings�4 switching outputs are available:
• 3 freely programmable switching outputs (NC / NO)
• 1 switching output for overflow prevention according to WHG* (NC)
* Building authority approval according to the German Federal Water Act (WHG)�
If the unit is used as overflow prevention with building authority approval
according to the German Federal Water Act (WHG), please observe the
corresponding chapter (= Technical description) of the documentation!
4.1 Operation with coaxial probe
Only operate the device with coaxial probe! Operation with single probe is
not supported by this unit version�
The coaxial probe is made up of an inner probe and an outer probe pipe (coaxial
pipe)� The probe is centred in the coaxial pipe by one or several spacers�
When using a coaxial probe, media with a low dielectric constant
(e�g� oil and oil-based media) are detected in addition to aqueous media�
Furthermore, no lateral minimum distances to tank walls and objects in the
4.2 Applications
• Water, water-based media
• Oils, oil-based media
• Medium temperature 0…80 °C
• Tank pressures: -0�5���4 bar
Application examples:
• Detection of power steering oil
• Monitoring of brake fluid
• Detection of water-glycol mixtures
• Monitoring of hydraulic oil in a hydraulic power unit