ALCO Switch ALCO PS3-AF3

Core Features Diaphragm-Based Sensing for Low-Pressure Applications: Functions as a precision low-pressure switch designed to monitor and control pressure in pneumatic systems operating at low ranges. It utilizes a silicone rubber diaphragm that provides highly sensitive pressure detection, ensuring accurate response to small pressure changes (0.1–3 bar). This makes it ideal for applications requiring precise pressure monitoring, such as cleanrooms, laboratory equipment, or delicate pneumatic control systems. Adjustable Pressure Setpoints with Locking Mechanism: Features a manual adjustment screw to set actuation pressure between 0.1–3 bar (1.5–43.5 psi), with a differential (deadband) of 0.05–0.3 bar (0.7–4.3 psi) to prevent rapid cycling. A locking nut secures the setpoint, preventing drift from vibration or accidental adjustment—critical for maintaining stability in automated processes. The clear pressure scale on the housing simplifies calibration without specialized tools. Broad Fluid Compatibility: Compatible with compressed air, inert gases, and non-corrosive fluids, thanks to its brass pressure port and silicone diaphragm. This versatility allows use in diverse environments, from food-grade pneumatic systems (where clean air is critical) to laboratory gas lines, ensuring reliable performance without contamination risks. SPDT Contacts for Versatile Control: Equipped with single-pole double-throw (SPDT) contacts (1 normally open/1 normally closed) rated for AC 250V (5A resistive) and DC 30V (3A resistive). This configuration supports: Triggering alarms or indicators via the NO contact when pressure deviates from set ranges. Controlling small pneumatic components (e.g., solenoid valves, mini compressors) through the NC contact. Sending pressure status signals to PLCs or monitoring systems in light industrial automation. Compact, Durable Housing: Housed in a glass-reinforced nylon housing that combines lightweight design with impact resistance (UL94 V-0 flame rating). It meets IP54 protection (IEC 60529)—resistant to dust and limited water spray—suitable for installation in control cabinets, machine enclosures, or semi-exposed pneumatic manifolds. Easy Installation & Integration: Designed for panel mounting via two M3 screws, with a 1/8-inch NPT female port for straightforward connection to pneumatic lines. The terminal block uses screw-type connections accepting 0.5–1.5mm² solid/stranded wires, ensuring secure, vibration-resistant wiring. Its compact size (45mm × 35mm × 28mm) fits in space-constrained setups. Typical Applications The ALCO Switch PS3-AF3 is engineered for low-pressure monitoring in sensitive pneumatic systems, with core use cases including: Cleanroom Pneumatic Control: Installed in cleanroom environments to monitor air pressure in ventilation systems, ensuring positive pressure is maintained to prevent contamination from external air. Laboratory Gas Systems: Used in laboratory setups to monitor pressure in inert gas lines (e.g., nitrogen, argon), triggering alerts if pressure drops below safe operating levels to protect experiments. Medical Equipment: Integrated into medical devices (e.g., respiratory equipment, dental tools) to monitor and control air pressure, ensuring patient safety and device performance. Food Packaging Machinery: Deployed in food packaging lines to control pressure in vacuum sealing or gas-flushing systems, maintaining consistent packaging quality and extending shelf life. Printing Press Pneumatics: Used in printing equipment to monitor pressure in ink delivery or paper handling pneumatic systems, preventing jams or quality defects by ensuring stable pressure.