Outdoor temperature sensor type ST4-R Used with ecoMAX850 automation systems. It monitors the outside air temperature, which is used to adjust the automation algorithms and coolant temperature, maintaining comfortable indoor conditions. It is moisture-resistant. Install in shaded areas on the north or northeast side of the building, avoiding direct sunlight. The sensor should measure the natural air temperature, not reacting to sunlight or heat flow rising up the wall (installing it on a sunny side but in the shade under a canopy is a serious violation).














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