Load cell amplifiers are used to increase the strength of signals of a load cell. They are available in small designs with durable breakout boards to make the users able to easily read the cells to measure weight. They are connected to the microcontroller to read the changes in the resistance of the load cell. These Load cell amplifiers are handy products when it comes to creating process control or simple presence detection, industrial scale, etc. The YLW pin is an optional input and shield against outside EMI.