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Ambient air thermostat, in an IP65 polyester junction box, for ambient temperature measurement outside, inside a room or an enclosure, in all places requiring the use of ATEX 2014/34/EU or IECEx certified equipment for explosive atmosphere. These thermostats can be installed in zones 1 and 2 (gas environment) or in zones 21 and 22 (dust environment) to control heating devices (radiators, air heaters, etc.). Control range from -20 to +40 °C with automatic reset. 1 changeover contact. Switching capacity: 16 A, 230 V 1P.