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Electrodes with integrated evaluation electronics for conductive level detection and control
The electrodes are used for conductive detection of limit levels. The areas of use cover all sectors where liquid and conductive media are to be detected or controlled.
Limit value measurements (overflow, dry run, max. alarm) as well as min./max. control and pump control (hysteresis) can be implemented.
The compact electrode ET-4 can be used on site for optimum utilisation of cramped conditions. The electrode consists of an enclosure with up to 5 rod electrodes. The unit can be fastened using a G1¼" connection thread. The enclosure contains the built-in evaluation electronics and is equipped with 1 to 4 output relays depending on the type.
A low alternating current flows once the electrode is submersed into a conductive liquid. This alternating current is evaluated by the switching amplifier (electrode relay). Exceeding an adjustable trigger threshold will energise the according relay.
Sensitivity as well as switching delay and the two-step pump control can be pre-selected directly on the unit using DIP switches.
|Power supply||24 V DC ±15 %|
|Power consumption||2 W|
|Number of electrodes||2 - 5|
|Rod length||1 – 3 Meter|
|max. operating pressure||10 Bar|
|Material||Enclosure: Polypropylene Protection: IP 65 Rods: stainless steel 1.4571 Coating: Polyamide|
|Operating temperature||-20 °C to +85 °C|
|Storage temperature||-20 °C to +85 °C|
|Humidity||90 %, non-condensing|
|Relays||1 to 4 (1 relay per limit value, normally closed) load up to 230 V AC / 3 A (cos. 0.9 switching capacity max. 500 VA/150 W|
|Sensitivity||3 KΩ; 10 KΩ; 30 KΩ; 100 KΩ|
|Switching delay||0.5 or 2 seconds|
Specifications subject to change.