PTC thermistor type level controller with selectable functions:
Level switch (1 probe),
Level control for filling (2 probes),
Level control for emptying (2 probes)
Level switch with 1 probe: The relay switches in case of contact or loss of contact with the liquid. When the switch point is set, it must be observed that the PTC thermistor requires approx. 8 seconds to heat up depending on the ambient temperature.
Level control for filling with 2 probes: Set internal switch to "fill". The relay energises after the min. probe has heated up. Relay de-energises when the max. probe comes into contact with the liquid.
Level control for emptying with 2
probes: Set internal switch to "empty". Relay energises when max. probe has contact with the liquid. Relay de-energises when the min. probe loses contact with the liquid and heats up.
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<p>
<strong>Example: daily-service tank for fuel oil</strong>
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<b>Legend:</b>
<ol>
<li>Storage tank pump</li>
</ol>
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