The Model 351 comprises of a single input sensor linked to a Barton Differential Pressure Unit (DPU) by capillary tubing. Hydraulic fluid is sealed inside the sensor and capillary tube, eliminating the need for additional piping. As shipped from the factory, the Model 351 system only needs to be mounted on the vessel to provide continuous level measurement when used with a Barton read instrument.
The sensor can be mounted in vented or closed system ships. The readout instrument (DPU, for example) can be installed at different elevations (i.e. below the vessel, at the upper connection of the vessel or above the vessel) as long as the instrument calibration considers the difference in elevation between the instrument and the sensor. Depending on the stress score needed, a Model 351 or Model 352 scheme can include any of three device kinds: 500-psi SWP sensor, 3,000-psi SWP sensor, No-pressure ranking sensor. All three