In this example we will connect a MLX90614 to our ARduino and display the output on a 128 x 32 I2C OLED LCD display, you could use a different type of LCD or a bigger OLED variety but that is what we had at hand here
The MLX90614 is an Infra Red thermometer for non contact temperature measurements. Both the IR sensitive thermopile detector chip and the signal conditioning ASIC are integrated in the same TO-39 can. Integrated into the MLX90614 are a low noise amplifier, 17-bit ADC and powerful DSP unit thus achieving high accuracy and resolution of the thermometer.
I used a module for MLX90614, see the links at the bottom but here is a picture of a typical one
Now both the OLED display and the MLX90614 are I2C devices and both require 3v3 and GND, so the wiring is pretty straightforward for this project. Here is a layout drawn up in fritzing to give you the general idea