This adjustable differential pressure switch provides reliable monitoring of small pressure changes with a compact, proven design. The switching point is field adjustable without the need for a manometer, via an adjustment knob and the builtin calibrated visual scale. Key benefits Detects minuscule differential pressure changes accurately thanks to a compact size and proven design Field adjustable switching point without a manometer using the adjustment knob and builtin calibrated visual scale Compact form factor suited to tight installations and existing ductwork, piping, or vessels Clear verification of set point with a builtin calibrated visual scale for commissioning and maintenance Simple, reliable operation suitable for direct control of alarms, fans, pumps, or other process equipment based on a differential pressure threshold Key features Function: differential pressure switch that responds to small pressure changes Field adjustability: set point can be changed on site without tools or a manometer Readability: builtin calibrated visual scale provides a quick, easytoread set point Size: compact design designed for spaceconstrained installations Performance: designed for reliable detection of subtle pressure differences with straightforward operation Applications HVAC systems and air handling: monitor pressure drop across filters to maintain airflow and trigger control actions as filters load Pneumatic or hydraulic circuits: protect equipment by signaling when differential pressure reaches a critical level Cleanroom or controlled environments: maintain required pressure differentials between spaces to ensure containment and proper airflow Use scenarios Scenario 1: In an office building HVAC duct, set the switch to trigger an alarm or adjust fan speed when the filter delta P rises beyond a chosen threshold, helping maintain air quality and system efficiency Scenario 2: In a processing line, place the switch across a pump suction or discharge path to alert operators or stop the pump when differential pressure indicates a blockage or pump impairment Scenario 3: Between rooms in a laboratory or cleanroom, set a differential pressure threshold to maintain the desired positive or negative pressure relationship for containment and safety This product stays true to the intended function and does not introduce changes to brand, specifications, models, or core capabilities while presenting clear, customerfocused benefits and practical usage guidance.