FSU12LF Sensata

FSU SERIES FLOW SWITCHES FLOW DETECTION SWITCHES These flow switches are designed for use in liquid flow systems at pressures up to 10 bar and temperatures up to 85C. The design is based around a moving magnet and a fixed reed switch with a low flow restriction. The switches are designed to be used in liquids only and should not be used in systems with significant amounts of solid particles. Custom versions can be made for particular applications. Features 1/2 and 3/4 NPT thread connections 1/2 and 3/4 push fit connections Low flow versions available Maximum operating pressure 10 bar NSF 61 Approved Operating temperature rated to 185F SPECIFICATIONS Technical Electrical Material NSF approved Acetal Contact Form N/O with no flow Color White Switching Power Max VA 25 -20 / +85 Switching Voltage AC Max V 240 Temp. Range C F Switching Voltage DC Max V 120 -4 / +185 Cable 10 (25cm) PVC insulated Switching Current Max A 0.6 All ratings are resistive load only. VARIANTS Threaded FSU12A FSU12LF FSU34A FSU34LF Approvals *Must Operate US Gal/min (liters/min) 0.53 (2.0) 0.24 (0.9) 0.99 (3.75) 0.47 (1.75) NSF Must Release US Gal/min (liters/min) 0.08 (0.3) 0.07 (0.25) 0.37 (1.4) 0.20 (0.75) NSF Page 1 www.sensata.com Copyright 2021 Sensata Technologies, Inc. Push Fit FSU50A FSU50LF FSU75A FSU75LF Approvals *Must Operate US Gal/min (liters/min) 0.53 (2.0) 0.24 (0.9) 0.99 (3.75) 0.47 (1.75) NSF Must Release US Gal/min (liters/min) 0.08 (0.3) 0.07 (0.25) 0.37 (1.4) 0.20 (0.75) NSF * The switch will have operated (contacts closed) when the flow rate rises above this value. The switch will have released (contacts open) when the flow rate falls below this value. NB For low flow rate switches the operate and release flow rates only apply when the switch is mounted with the flow direction vertical. The sensitivity of the switch is reduced when mounted with the flow direction horizontal. INSTALLATION Flow switches can be mounted with the flow direction horizontal or vertical (upward flow). The cap with cable connection must always be upwa rds, as the piston is returned to its released position by gravity. When using metal compression fittings to connect flow switches to copper tube, care must be taken not to over-tighten the fittings onto the flow switch body. CAUTION The use of plastic plumbing fittings may affect the electrical earth continuity bonding as required by IEE regulations. If in doubt, consult a qualified electrician. DIMENSIONS All dimensions are in millimeters. Page 2 www.sensata.com Copyright 2021 Sensata Technologies, Inc.