The ETF-744/99 Outdoor Air Temperature Sensor by ELEKTRA is tailored for use with ELEKTRA electric floor heating systems, snow and ice protection systems, and frost protection systems. Typically mounted on roofs, this sensor offers surface mounting ease. Featuring an IP54 ingress protection rating, it ensures durability against external elements. With dimensions of 90 x 156 x 45 mm, this sensor accurately measures air temperature, providing essential data for efficient control of heating and protection systems.