float switch not working

gregapex
Registered Users Posts: 9 ✭✭
I have a float switch. https://www.amazon.com/dp/B07PXFPPMM?psc=1&ref=ppx_yo2ov_dt_b_product_details. I am running it 260’ to my well pump with 18/3 sensor wire. It's not turning off the pump when tank is full. What am I doing wrong and/or what device do I need to install to increase the voltage over that distance, if that is in fact the problem.
thank you
Comments
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According to Amazon this is a 4 to 20 mA device, meaning that it changes it's resistance to adjust current flow to signal to compatible 4 to 20 mA equipment (i.e. it would work something like allowing 4mA when empty and 20 mA when full or vice versa). You may have it hooked up as a simple float switch (ie zero resistance closed to infinite resistance open) which may explain why it's not working.
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