The Siemens catalog number QFA3212.FWSN refers to a room unit designed for measuring relative humidity and temperature. This device features a full HMI interface, allowing for straightforward monitoring and control. It supports output signals of 0-10V and 4-20mA for relative humidity, providing flexibility in integration with various control systems. The temperature measurement is handled by a 1K (385A) platinum sensor, ensuring accurate and reliable readings. You can find this solution, distributed by BSP Automation, well-suited for applications requiring precise environmental monitoring in HVAC setups and building automation.