The Guth Model 12V500 Alcohol Breath Simulator is a State-of-the-Art, electronically temperature controlled, water-alcohol instrument for the purpose of providing  a precise calibration standard for testing or calibration of alcohol breath analyzers.  The Model 12V500 is the first simulator of its kind to incorporate dual temperature  probes to independently control and monitor the temperature of the solution. The  temperature of the water-alcohol solution placed in the simulator is maintained at  34掳鈥奀 卤 .05掳鈥奀 or better. The inlet and outlet port pathways have been designed to  be an integral part of the one piece heated aluminium top housing thus allowing  uniform heating and reduction of condensation. The new LCD graphics display has  a temperature resolution of .01掳鈥奀 and will display simulator status to the user in  the form of messages and status codes. As with all Guth products the 12V500 has  been engineered using the highest quality components to give reliable, accurate and  trouble free operation.