Siemens Room Temperature Sensor (QAA2061) is designed for wall mounting. Active sensor for acquiring room temperature suitable for use in heating, ventilation and air conditioning plants for acquiring room temperature. The QAA2061 has a wide measuring rate, selectable between -35 to +35°C (R1), 0 to +50°C (R2=Factory setting) and -50 to +50°C (R3). This makes the Siemens QAA2061 the comprehensive solution across a variety of temperature ranges.