Profile: Guth Laboratories Inc. is a provider of electronic simulators to calibrate and standardize preliminary & evidential breath analyzers used by law enforcement & educational institutions. We supply domestic & foreign alcohol breath test simulators and certified alcohol reference solutions used to establish standards. We also offer alcohol breath test accessories, supplies, and service, including fuel cell sensors, sanitary mouthpieces, and the smallest hand carried preliminary breath testers. Our products include dry gas testing supplies, dry gas regulators, fuel cells, mouthpiece alcohol breath test & portable alcohol simulator and system simulator accessories. Our fuel cells are alcohol detector sensor when used with hand carried preliminary breath testers, evidential breath analyzers, and automotive interlock systems. Our fuel cell is an electrochemical device that generates a voltage across the output electrodes when an ethanol gas sample is introduced into the cell.