Patent ID: 7520163

Claim:
A portable diesel fuel tester, comprising: a LCD display that displays testing information; a testing chamber for testing a diesel fuel having a door, the door having vent holes that vents a gas from the testing chamber; a sample tray located in the testing chamber that receives a sample of diesel fuel to be tested, the sample tray having a heating element that heats the diesel fuel to a-gas state; a SO 2 sensor that senses SO 2 gas generated by the heating of the diesel fuel; an air pump that circulates the gas of the heated diesel fuel from the sample tray to the SO 2 sensor; a power source for powering the fuel tester; a processor having a software that operates the tester, wherein the processor is in communication with the LCD display, the SO 2 sensor, the heating element, the power source and the air pump; and a housing that houses the LCD display, the testing chamber, the sample tray, the SO 2 sensor, the processor, the power source, and the air pump, wherein the housing is configured so that the tester is portable.