1811Features:Accurate – used with the Vessel Systems Monitor VSM 422 PN 1800-can 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 * Calibrated for use with Blue Sea Systems Vessel Systems Monitor VSM 422 only WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov. Owner’s Manual (pdf)