QPL32.020M00 Siemens Gas Pressure Switch

Overview The Siemens QPL32.020M00 is a manual reset gas pressure switch designed for monitoring gas or air pressures in industrial and commercial burner systems. Part of the QPx32 series, this low-pressure switch is engineered to detect when pressure falls below a predetermined setpoint, providing a critical safety function by initiating a shutdown or alarm. It is compatible with natural gas, propane, butane, hydrogen, biogas, and air, making it a versatile component for various combustion applications. Features Manual reset mechanism requires physical intervention after a pressure drop for enhanced safety Suitable for low-pressure supervision of gas and air NEMA 4 rated enclosure provides protection against dust and water, suitable for outdoor use Integrated ventless operation capability up to 7 psig Compact and robust design for easy integration into gas trains FM approved and UL listed for safety and reliability Specifications Pressure Range: 2 to 20 inches water column (wc) Reset Type: Manual Maximum Operating Pressure: 15 psig Switch Type: SPDT (Single Pole Double Throw) Enclosure Rating: NEMA 4 / IP65 Connection: 1/4 inch NPT Operating Temperature: -40 F to 140 F (-40 C to 60 C) Media Compatibility: Natural gas, propane, butane, biogas, hydrogen, and air Applications Monitoring low gas pressure in industrial burner gas trains Safety shut-off systems for commercial boilers and furnaces Supervision of air pressure in HVAC ventilation and combustion air systems Gas pressure monitoring in power generation and process heating equipment Use in applications requiring manual acknowledgment of pressure faults