This is a DS18B20 temperature sensor in a waterproof housing with 1 meter (36in) long insulated leads. This is perfect for both internal and external temperature measurements in outdoor robotic applications. Formerly TE-233-036.
The Melexis MLX90614ESF-AAA is a high-accuracy, high resolution, non-contact thermometer with a 90-degree field of view. It has a measurement resolution of 0.02°C and is factory calibrated for a wide -70 to 380°C object temperature range.