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N V 9 i S E R I E S X 7 b Vertical Liquid Sensors Model - ass 4 4 Ronan's Model LS-3 Vertical Liquid Sensor and the variations LS 3s and LS-ass are designed to detect 4-1 All changes in liquid level within reservoirs or the intrusion of liquid in dry containment zones and caisson compart- M LS-3 MoU LS-1 ments where vertical positioning of the sensor is allowed. The LS-3 is constructed of 304 and 315 stainless steel, polysulfone, Buna--N and PVC. The LS-3s includes an Typical Applications integral Pull-to-Test cable,required in some jurisdictions. . DW Steel Tank Interstice Monitoring The LS-3ss Sensor is constructed of 304 and 315 stain- less steel and Teflon,and is designed for use in chemical IN Piping Containment Sumps applications where corrosion is a concern.All LS-3 sen- 4 • Sub-pumpContainment Sumps p sots are designed to provide years of trouble-£tee service. • Fill Riser Containment Sump AD LS-3 sensors have user selectable logic and may fff High Levet/Overfill Monitoring be installed in wet or dry conditions. Liquid collection or 3 • Vertical Application Point Level Sensing loss, sufficient to move the float will transmit a signal to • Where Ground Level Testing is Required the control panel to initiate control functions or annunci- ate alarms. The LS-3's resign allows rigid or flexible • Corrosive Chemical Monitoring mounting to allow easy periodi c testing as required by many regulatory agencies. The sensor may be mounted LS4 Sensor Switch loosely suspended by its cable or rigid with the 1/2 inch NPT nipple. i cs.3 Senior Glass g'" ` tdt [� ped- F IempticaIIy ScaealcDependable, Simple ration Reed Switch Assembly Ronan's LS-3 Sensors operate on a direct principle. A, glass encapsulated hermetically sealed reed switch is Stem embedded within the sensor stem. Permanent magnets 1 within the sensors float create a magnetic field which sur- Mapet rounds the reed switch holding the switch closed.When Reed the magnetic field is removed by movement of the float, Switch the reed switch is actuated, thereby changing the state. Float This condition either opens a closed switch or closes an open switch. This change in state is then signaled to the control panel.