The Omron E3FC-RN21 is a series of digital pressure sensors made by Omron, a Japanese electronics company. It is a hybrid type piezo-resistive pressure sensor that is suitable for the measurement of pressure and temperature in the 0 to 13 bar range. The E3FC-RN21 is a compact and lightweight unit that is robust, versatile and very cost effective. It features a pressure input and an analog output that allows for both local and remote pressure measurements. Additionally, the E3FC-RN21 series also takes care of overpressure and reverse pressure protection, as well as an elective/adjustable zero-offset.