Can I use a [cold] fog-producing machine for leak detection purposes?
Any machine that produces a cold fog may be suitable for theatrical stage antics but is not suitable for professional leak detection purposes. Any machine that does not use a heating element is considered a cold fog machine. A cold fog machine simply atomizes a liquid solution. (Just about any solution can be atomized, even water). What you get is a heavy wet fog that can be very unfriendly in today’s sophisticated automobiles – most especially in a vehicle’s fuel vapor recovery (EVAP) system. EVAP systems are equipped with an activated charcoal that must maintain its integrity, otherwise you’ve just made matters worse. In other words, the wet fog can saturate the activated charcoal, rendering the EVAP system ineffective and most likely voiding the vehicle’s warranty. Another disadvantage is that the wet fog has a tendency of quickly condensing inside the system being tested, lacking that “hang time” required to properly travel through an entire test system. The only way to produce the
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