The SICK WL4S-3P3132 is a compact retro-reflective photoelectric sensor featuring autocollimation optics so it can detect objects without the need for a reflector. It uses a visible red PinPoint LED light source and includes a single teach-in button for easy setup. The sensor offers fast, light-only switching (PNP), operates over a wide supply range, and delivers high-speed response—all within a rugged, IP67-protected plastic housing suitable for industrial environments.

Technical Specifications Category Specification Model Type 299H Type Pilot-Operated, Pop-Action Pressure Relief Valve Function Overpressure Protection for pressurized systems. Operation Pilot-Operated. The main valve is held closed by system pressure. The pilot valve senses pressure and, upon reaching setpoint, vents the pressure from atop the main valve piston, causing it to open fully. Action Pop-Action (Rapid Opening) Services Liquid, Gas, and Steam Set Pressure Range Varies with valve size and service. Can be rated for a wide range, from low pressures to over 1000 psig (69 bar). Blowdown Adjustable (typically 2-7% for steam/gas, 5-20% for liquid). Main Valve Sizes Typically available in a range of sizes, e.g., 1" x 2", 1-1/2" x 3", 2" x 3", 3" x 4", 4" x 6" (Inlet x Outlet). End Connections Flanged (ANSI Class 150, 300, 600, etc.) or Butt-Weld. Body Materials Carbon Steel (standard), with other alloys like Stainless Steel available. Pilot Valve Materials Stainless Steel (standard). Standards Compliance Can be designed to meet ASME Boiler and Pressure Vessel Code, Section I and Section VIII.

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