The development of the new ECO 123-AIR focused intentionally on the essential functions of measurement technology. The sensor design combines a highly precise and reliable sensor with a protective function, providing a practical solution for adequate sensor protection and optimal response speed. Precision, speed, and reliability, all packaged in a compact and robust housing, make the device a dependable partner for professional users, made in Germany. The device is used in both building management and meteorology—whenever quick data capture or reference measurement on-site is required. The simple alarm function facilitates temperature monitoring in parallel while allowing users to attend to other tasks.