The microprocessorbased design maintains accuracy over a wide range of temperatures and conducts regular selfchecks to ensure correct operation. Additionally, one of the relay outputs is specifically designed for control of a cooling fan, and the userconfigurable fan exercise option extends the fan life and reduces bearing lockup.All Shinko products are designed and manufactured in Japan to the highest standards of quality and reliability including ISO9001. Shinko has been building quality products for over 50 years. more... See more text