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.