How to use Arduino UNO for low-cost temperature measurements with Pt 100 sensors

Temperature measurements are widely used for different applications, such as measuring air temperature in ventilation ducts, measurements for thermal comfort and other more specialized applications. Therefore, it is important to have access to reliable temperature sensors. However, this can be expensive, and the need for cheap robust temperature measurement setups is therefore high. This lecture note seeks to make this more approachable, by measuring temperature using an Arduino UNO, an amplifier and a Pt 100 sensor.
The aim of this lecture note is to detail the full procedure to make cheap temperature measurement setups using an Arduino UNO and Pt 100 sensors. These temperature measurement setups have been built and are used at Aalborg University, Department of the Built Environment (https://www.en.build.aau.dk/).
The guideline is meant for people with zero experience, so anyone can replicate the setup. Section 5 is a step-by-step guideline on how to connect the Arduino for measurement setup, and what code to use for logging the data. This section can stand alone and require no knowledge of the other sections. For a more thorough overview of the setup, read the previous sections as well. If any issues are experienced, refer to section 6 for troubleshooting common problems.