These temperature sensors have a compact enclosure with protection class IP65/NEMA 4 to facilitate easy and fast installation. Due to external mounting holes, the sensors can be installed with closed housing, which protects the device from contamination. The series, which in-cludes the EE431, EE441, EE451, EE461, and EE471 models, matches the design of the E+E humidity, CO2, and air-velocity sensors.