As a veteran-grade centrifugal wheel

For contractors managing HVAC preventative maintenance

this valve utilizes characterized ball valve technology to deliver equal percentage flow

If you notice brittle edges

Siemens Building Technology QFA32SS.EWSN Sensor 326058-758 As a veteran-grade centrifugal wheelThe Siemens Building Technology QFA32SS. EWSN is a professional grade Room Relative Humidity and Temperature Sensor designed for high accuracy monitoring in commercial BAS environments. Engineered for versatility, this unit features a selectable 0 10Vdc or 4 20mA output signal for both humidity and temperature, allowing for seamless integration with APOGEE controllers and other third party building automation systems. With a 2% RH accuracy rating