Siemens Building Technology QFA32SS.EWNN Sensor 340793-762 this adjustable pressure switch prevents

this adjustable pressure switch prevents unsafe operation by detecting flue blockages or inducer failure

Whether used for new construction or as a retrofit HVAC solution

This assembly is designed to interface with the standard intake and exhaust diameters specified for Reznor models 150 through 400

It utilizes laser-welded stainless steel bellows and a vapor-filled capillary to ensure reliable pneumatic action and consistent response to temperature fluctuations

the contact ratings are suitable for standard pilot duty applications across common control voltages

Siemens Building Technology QFA32SS.EWNN Sensor 340793-762 this adjustable pressure switch preventsThe Siemens Building Technology QFA32SS. EWNN Sensor is a high precision field device designed for critical HVAC monitoring and Building Automation Systems (BAS). Built without a display (No HMI) and featuring a clean "No Logo" aesthetic, this room humidity and temperature sensor provides 2 percent accuracy for demanding environments like laboratories, data centers, and clean rooms. It supports field selectable 0 10Vdc, 0 5Vdc, and 4 20mA output