The Fluid Pressure Monitor is used to interface up to six pressure transducers to the NMEA 2000® network (pressure transducers sold separately). This allows you to observe fluid pressures and tank levels anywhere on the vessel where there are NMEA 2000 compatible displays. With the appropriate transducer the FPM100 reports either pressure or vacuum for a variety of applications including water pressures oil pressures hydraulic pressures or system vacuum for detecting clogged filters. The FPM100 also has a tank level mode so that fluid levels in a tank can be monitored via a pressure transducer mounted at the bottom of the tank and transmitted over the NMEA 2000 network. This allows you to monitor the fluid levels in tanks that are extremely deep have internal structures or are otherwise not suited for other tank level sensing technologies. In this mode the FPM100 can be calibrated for irregular tank shapes so that you know the true level of the tanks. Pressure Transducer NMEA 2000® Interface Interfaces Up To Six Pressure Transducers To The NMEA 2000 Network Each Channel Independently Programmable To Match Pressure Transducer Characteristics Each Channel Independently Programmable In Pressure/Vacuum Mode Or Tank Level Mode