The Otis Instruments, Inc. GenII ProSafe 4×22 Model OI-7420 is a two channel gas monitor that functions as a transmission controller. The OI-7420 monitors toxic, combustible and oxygen gas levels in ambient air by receiving and displaying 4-20mA signals from up to two wired sensor assemblies.
The OI-7420 features a 160×104 graphical LCD display and is equipped with four “dry contact” (Form C) 5 Amp alarm relays (with 4 Amp fuses) that are full-scale adjustable. The OI-7420 operates with either 12-35 Volts DC or 110/240 Volts AC power-in and includes a Modbus output with optional real-time monitoring software.
The ability to display data and activate alarms in relation to readings sent from on-site sensors make the OI-7420 a truly phenomenal product in the safety realm of the gas industry.