Cảm biến phát hiện dòng chảy Princo Instruments L3515, L3545
The Princo Model L3515 and L3545 Presence/Absence Detectors are adjustable, RF impedance-sensing devices which, when connected to any Princo L600 Series Sensor Flange, can be used to detect the presence or absence of process material within a pipeline. The L3515 and L3545 units, with Sensor Flanges, are used for obstructionless presence/absence detection of liquids and solids in all types of process systems, and for run dry protection of positive displacement pumps. Instrumentation designed with the user in min • Water-based liquids, slurries & sludge • Acids • Hydrocarbons and solvents • Powders and granulars • Oils
The units are provided with a continuously adjustable 0 to 30 second time delay to avoid unnecessary shutdowns due to momentary voids which might appear in the process stream. Also included as a standard feature is a push button, which permits easy pump startup with an empty line or which can be used to override normal control in an emergency
Sensor flanges are available in standard pipe sizes ranging from 1 to 12 inches. The PRINCO L3545 is similar in operation to the L3515, except that the L3545 has a remote mounted sensor flange, which may be located up to 3000 feet away from the electronics unit. They are connected by means of an ordinary multiconductor (not coaxial) cable. A remote override (startup) feature is also provided. Reliable protection is thus available for applications where equipment must be located in inaccessible areas.