The YF-4EI from Luoyang Yida Automation Research Institute is a four-channel thermocouple measurement board based on a bare board design. It has the characteristics of low cost and high performance. Each measurement board can connect 4 channels of K or E type thermocouples, and can be expanded up to 16 modules through cascading. The measurement board uses a standard SPI interface to output temperature values after linearization, and has an open interface. In addition, it also has built-in automatic compensation for thermocouple cold end and thermocouple open circuit alarm.
