The product code Gefran 1000-R0-1R-0-0-00 specifies a microprocessor-based PID temperature and process controller manufactured by Gefran.Part Number BreakdownEvery section of this hardware code reveals a factory-defined hardware configuration:1000: Model & Form Factor. This represents the 1000 Series controller in a standard 48mm x 96mm (1/8 DIN) panel-mount size. It features a 3-digit green LED display.R0: Main Control Output. Equipped with a hybrid Relay / Logic output designed with spark suppression on the Normally Open (NO) contacts.1R: Alarms. Includes exactly 1 Relay Alarm Output.0: Digital Communications. Features no serial communication interface (such as RS485 or Current Loop).0: Power Supply. Configured for low-voltage 11 to 27 Vac/dc operations (50/60Hz, 9VA max power consumption) rather than standard mains voltage.00: Customization Code. Standard default construction with no special software or hardware modifications.