Core Features Piston-Type Pressure Sensing Mechanism: Functions as a pressure-actuated switch designed to monitor and control pressure levels in hydraulic and pneumatic systems. It uses a precision brass piston actuator with a fluoropolymer seal to detect pressure changes, triggering contact switching when the setpoint is reached. The piston design ensures accurate, repeatable operation (±2% of setpoint) across a wide pressure range, making it suitable for both low-pressure pneumatics and medium-pressure hydraulics. Adjustable Pressure Setpoints: Features a manual adjustment screw to set actuation pressure between 0.5–6 bar (7–87 psi), with a differential (deadband) of 0.3–0.8 bar (4–12 psi) that prevents rapid cycling. This adjustability allows customization for diverse applications, from monitoring compressed air lines to controlling hydraulic clamping systems in machine tools. A clear pressure scale on the housing simplifies calibration without specialized tools. Industrial-Grade Fluid Compatibility: Compatible with mineral oils, water-based fluids, and compressed air, thanks to its brass wetted parts and fluoropolymer seals. It resists corrosion from hydraulic fluids, lubricants, and mild industrial chemicals, ensuring long-term reliability in manufacturing, automotive, and mobile equipment applications. The 1/4-inch NPT female port connects easily to standard fluid lines. SPDT Contacts for Versatile Control: Equipped with single-pole double-throw (SPDT) contacts (1 normally open/1 normally closed) rated for AC 250V (10A resistive) and DC 30V (5A resistive). This configuration supports: Triggering alarms or indicator lights via the NO contact when pressure exceeds/ drops below setpoints. Controlling pumps, valves, or compressors through the NC contact to maintain pressure within safe ranges. Sending pressure status signals to PLCs or SCADA systems in automated processes. Robust Housing for Industrial Environments: Housed in a die-cast zinc alloy housing with a corrosion-resistant plating, providing durability in harsh settings. It meets IP54 protection (IEC 60529) for dust resistance and limited water spray protection, suitable for installation in control cabinets, machine enclosures, or semi-exposed hydraulic/pneumatic manifolds. Simple Installation & Calibration: Designed for inline mounting via the 1/4-inch NPT port, with optional mounting brackets for panel or surface installation. The terminal block uses screw-type connections accepting 0.5–2.5mm² solid/stranded wires, ensuring secure, vibration-resistant wiring. Calibration is tool-free via the adjustment screw, with a locking nut to prevent setpoint drift from vibration. Typical Applications The ALCO Switch MPA206R is engineered for pressure monitoring and control in hydraulic/pneumatic systems, with core use cases including: Compressed Air System Monitoring: Installed in compressed air lines to trigger alarms or shut down compressors when pressure exceeds safe limits (e.g., in manufacturing plants or workshop air systems). Hydraulic Clamping Control: Used in machine tools to verify that hydraulic clamps have reached sufficient pressure to secure workpieces, preventing machining errors or workpiece ejection. Pneumatic Conveyor Systems: Deployed in pneumatic material handling systems to monitor line pressure, ensuring consistent airflow for transporting bulk materials (e.g., plastics, grains). Mobile Equipment Hydraulics: Integrated into construction or agricultural machinery (e.g., excavator arms, tractor lifts) to prevent overpressure in hydraulic cylinders, protecting hoses and components from damage. Cooling System Pressure: Monitors pressure in industrial cooling water or glycol systems, triggering pumps or valves to maintain optimal flow rates and prevent overheating.