The PM500 process meter from Electro-Sensors can run as a stand-alone rate meter or can be configured to run as a complete control and display system. The fully programmable meter has two 4-20 mA sensor inputs that can be scaled to any user-selected units. The sensor can be powered by either 115 VAC or 230 VAC and includes a four-digit display that is switchable between two inputs and communicates via Modbus RS-485. 800/328-6170; www.electro-sensors.com.