OYS-FG02 - Access Control Camera (Face Recognition/Temperature Indicator). The temperature measuring device should be used in a room with a room temperature between 10 °C -40 °C. Do not install the temperature measuring device under the vent, and ensure that there is no heating source within 3 meters. Personnel entering the room from a cold outdoor environment will affect the temperature measurement accuracy. The forehead temperature test should be performed after the forehead is unobstructed for three minutes and the temperature is stable.