Blue Sea Systems Vessel Systems Monitor Tank Sender - Diesel, Water, Waste - 1810Blue Sea Systems Vessel Systems Monitor Tank Sender Diesel, Water, Waste 1810 Accurate used with the Vessel Systems Monitor VSM 422 PN 1800can be precisely calibrated for each tank* Reliable SSI Technologies, Inc. Fluid Trac is non contacting eliminating any mechanical moving parts that can wear and cause intermittent or complete signal loss Digital filtering Eliminates errors due to liquids sloshing in mobile tanks Limitations and considerations for