Finder Level Control Monitoring Relay, 72 Series

<P>A wide range of <STRONG>Finder Monitoring Relays </STRONG>from the <STRONG>72 Series</STRONG>. These <STRONG>Level Control Relays </STRONG>are for measuring <STRONG>Conductive Liquids</STRONG>. The level control relays work by measuring the resistance through the liquid, between the common (B3) electrode and Min. and Max. electrodes (B2 and B1). If the tank is metallic, then this can be substituted as the B3 electrode.</P><P>Care must be taken to ensure that the liquid has a suitable resistivity. Suitable liquids include city water, well water, rainwater, sea water, liquids with low-percentage alcohol, wine, milk, beer, coffee, sewage and liquid fertilizer. Unsuitable liquids include fuels, liquid gas and paint.</P><P>This range also includes a <STRONG>Priority Change Relay</STRONG>. This special relay is for alternating loads, for applications with pumps, compressors, air conditioning or refrigeration units.</P>