[font size="3"]For those who have installed a SeeLevel 709 tank monitor: There is a piece of black hardboard on the back of the display to protect the circuit board. It is held on by three small screws. These can get loose and fall out with time. No effect on anything since it is just protective, but it bears watching. For those who lose a screw like I did the screws are US SAE #4 even though made in China. Score one for Garnet Instruments.
While you're at it, clean the connector with electronic contact cleaner. Mine got dirty.
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