FMP-LL3 Digital Probe Backwards Compatibility

Our latest digital inventory and leak detection probes (FMP-LL3 Series) are fully compatible with most legacy Franklin Fueling Systems Automatic Tank Gauges (ATGs). These newer 2-wire probes require a unique method of wiring referred to as LL2 Emulation Mode Wiring when pairing them with legacy ATGs. For a full review of the proper FMP-LL3 Series probe ATG wiring methods, including the Universal Data Protocol Mode Wiring method used for newer ATGs, refer to the quick reference diagrams below. FMP-LL3 Digital Probe Backwards Compatibility