The RMA421-A21A3A is a high-precision, universal process transmitter designed for reliable measurement and signal conversion. It features a 4-wire configuration with a control unit mounted as a DIN rail device. The transmitter supports up to two universal sensor inputs and offers optional SIL approval for safety-critical applications. It includes a user-configurable backlit LCD display with a 5-digit, 7-segment layout, allowing for clear visualization of measurement data, bar graphs, units, and tag names. The device is suitable for measuring various parameters such as current, resistance, RTD, thermocouples, and voltage, making it versatile for multiple process monitoring needs.

Endress+Hauser specialises in measurement and automation solutions for industrial processes. Their product portfolio includes flow meters, level sensors, and analytical instruments, supporting industries like chemical, food, water, and energy to improve efficiency, safety, and compliance.