Senders are designated by the following descriptions and must be selected in combinations of one each from A, B, & C. (For example: Single station, American resistance, Standard ground)
A Station Single | Dual
B Resistance American | European
C Ground Standard | Floating
Notes:
a. Station: It is the sender that is unique in a dual station application. The gauge is the same in either single or dual applications.
b. Resistance: Choose your sender to electrically match your gauge not just the manufacturer. Some sender manufacturers make both resistance types; and, some instrument manufacturers may use either resistance type depending on the gauge. There is usually no visual way alone to determine the resistance type.
c. Ground: Standard ground is the most common having battery negative (-) connected directly to the engine block. Sending units may have one (1) terminal (signal). In a floating ground system, the battery negative is not connected to the engine block so merely threading in the sender does not supply ground. Floating ground senders will have two (2) terminals (signal & ground). Both sender terminals may be wired to the appropriate gauge terminal or the sender?s ground may be wired directly to the battery negative. A floating ground sender may be used in a standard ground system but not vice versa.
