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The unit output will drive a 12v led when used with a 12v input voltage. If you want to use this to warn of a full tank condition (for example: a sewage holding tank on a boat or RV) the indicator switches OFF when liquid rises to the sensor level. I'm using a green LED which is ON until the tank level hits the 3/4 point. When the LED switches OFF, it's time to pump the tank.
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small size makes it perfect for my applications
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Works well
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Not work........
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ok
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