The Koehler K27100 Ramsbottom Carbon Residue Apparatus determines the "carbon residue" left after evaporation and pyrolysis of a sample oil in the Ramsbottom furnace, providing an indication of the deposit forming tendencies of fuels and guidelines for the processing of refinery products. This instrument is a thermostatically controlled coking furnace for five samples. Cast-iron block type furnace reaches the standard test temperature of 550C (1022F) rapidly and controls with ±1C stability. Microprocessor temperature control has C/F switchable digital setpoint and display. Operator and equipment are protected by an over-temperature control circuit which automatically interrupts power to the unit should block temperature exceed the programmed cut-off point. Communications software (RS232, etc.), ramp-to-set and other enhanced features are available as extra cost options. Heavily insulated stainless steel cabinet with three-layer refractory top provides excellent heat retention. Conforms to the specifications of: ASTM D524, D6074; IP 14; ISO 4262; FTM 791-5002; NF T 60-117