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 Application example |
- Level monitoring
- Level control
The VESA electrode controller operates according to the conductive principle, meaning that the electrical conductivity of the liquids to be monitored is used as an electrical connection between the immersed electrodes in order to detect two or four limit levels.
This conductive limit switch is not suitable for liquids containing oil or grease, or for liquids in which electrically conductive or insulating deposits may form. Measuring range: The VESA electrode controller can be used with liquids whose resistance between electrodes is less than 120 kΩ.
The device can be supplied with up to 5 electrode rods.
(to be ordered separately)
Control:
Two different operating modes can be configured:
- Direct monitoring of up to 4 level points (levels)
- Interval switching (MIN/MAX control) with self-holding using electrodes E2, E3 and the reference electrode, and additionally electrodes E1 and E4 for overflow and dry-run protection.
Metal tanks can be connected to electrode E0 and used as an extended reference electrode.
| Power supply | 10...30V DC | |
| Power consumption | ~2W | |
| Ambient temperature | -20…+60°C | |
| Medium temperature | max. 100°C | |
| Connection head | Glass fibre reinforced PBT, IP65 according to EN 60529 | |
| Max. operating overpressure | 6 bar at 20°C, 1 bar at 100°C, higher pressure on request | |
| Process connection | PP, G2" threaded plug | |
| Electrode rods | Stainless steel 316L, length: min. 45mm, max. 2000mm, also available partially insulated |
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| Measuring circuit | Galvanically isolated, AC voltage <5V / <1mA | |
| Sensitivity | Selectable via DIP switch Low <10 kΩ >0.1 mS Medium ~60kΩ ~16μS High >120kΩ <8μS |
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| Reset hysteresis | approx. 10% of the selected sensitivity value | |
| Sensor input | 2…5 rods for up to 4 limit values | |
| Indication | LEDs for relay switching status | |
| Operation | 6-position DIP switch for operating mode and sensitivity |
