The Otis Instruments, Inc. Gen II OI-7032 (32-Channel) is a hybrid monitor and data logger that supports up to 32 WireFree sensor units, and up to four 4-20mA input sensors (when only 28 channels are setup as WireFree). Outputs are Modbus RS-485 and 4 Dry-Contact relays.
Part Number Formula: OI-7032-[Power Supply]-[Radio Frequency]-A4