Some device support the MLX90614 Infrared temperature sensor (single pixel I2C sensor). For the complete list see Supported Sensors and Inputs.
For information on this sensor, visit: https://www.melexis.com/en/product/MLX90614/Digital-Plug-Play-Infrared-Thermometer-TO-Can
DM devices which have integrated this sensor simply read and report the raw value returned by the sensor. There is a conversion which must be done to convert this value into the temperature. Details are on page 30 of the Melexis datasheet.
It is also important to note that this sensor reports both Ta (ambient temperature) and To (object temperature). Users should make sure not to confuse the two.