Blue Sea Vessel Systems Monitor Tank Sender – Diesel, Water, WasteModel: 1810-BSSFeatures: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 lossDigital filtering – Eliminates errors due to liquids sloshing in mobile tanksLimitations and considerations for mounting the ultrasonic tank senders:Senders are calibrated to the VSM 422 and M2 Meters and will not function with other monitorsSenders must be mounted 4″ or greater distance from a tank side or baffleTank floor must not be slopedTanks must not be deeper than 32″Sender must be mounted perpendicular to the surface of the liquidThe sender negative connection should be connected as directly as possible to the main negative bus.SpecificationsOperating Current40mA @ 12V45mA @ 24VSupply Voltage10-32V DCWeight0.25lb (0.11 kg)