The ER422D-18B by Teledyne is a self-contained digital output data logger. It is designed to monitor and record a wide range of physical conditions including temperature, humidity, pressure, vibration, and other analog input signals. It features a built-in LCD display for displaying data readings, a keypad for command entry, and an internal battery for uninterrupted operation. It offers a range of data logging options including linearization, logging of min/max values, and analog to digital conversion. Additionally, it can connect to a PC via a USB or Ethernet connection.