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Danfoss-LLG 740 S

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January 14, 2026
Category Connection: WAGO Connectors
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#Pneumatic Cylinder #photo electric sensor #Danfoss LLG 740 S paddle flow switch
Brief: In this video, we take a focused look at the Danfoss LLG 740 S paddle-type flow switch and its specifications. You'll see how this mechanical flow monitor operates, learn about its adjustable set point for flow detection, and understand its SPDT microswitch functionality for pump protection and process control in water systems.
Related Product Features:
  • Mechanical paddle-type flow switch for detecting presence or absence of liquid flow in pipelines.
  • Available in multiple pipe connection sizes from 1/2" to 2" with female threaded BSPP/NPT connections.
  • Operates within a wide pressure range of 0-16 bar with a maximum pressure rating of 20 bar.
  • Features an SPDT microswitch with 5A, 250V AC rating providing NO and NC contacts for flexible wiring.
  • Constructed with robust brass body, chrome-plated for corrosion resistance in water applications.
  • Offers adjustable set point via external dial for precise flow rate trip point configuration.
  • Suitable for water and neutral liquid media with temperature range from -10°C to +120°C.
  • Provides bidirectional flow detection capability with IP54 protection rating when properly installed.
FAQs:
  • What is the operating pressure range for the Danfoss LLG 740 S flow switch?
    The Danfoss LLG 740 S operates within a pressure range of 0 to 16 bar, with a maximum pressure rating of 20 bar.
  • What electrical specifications does the SPDT microswitch have?
    The SPDT microswitch is rated for 5A at 250V AC and provides one normally open (NO), one normally closed (NC), and one common (C) contact for flexible wiring configurations.
  • What pipe sizes are available for the LLG 740 S flow switch?
    The Danfoss LLG 740 S is available in multiple connection sizes including 1/2", 3/4", 1", 1 1/4", 1 1/2", and 2" pipe sizes, which must be specified when ordering.
  • What temperature range can this flow switch handle for liquid media?
    The media temperature range for the LLG 740 S is from -10°C to +120°C, making it suitable for various water and neutral liquid applications.
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