A Bosch SMT 300 smoke machine.
Photo credit: Bosch
The Bosch SMT 300 Smoke Tester uses OEM-approved technology for EVAP leak testing, as well as testing of oil leaks, exhaust leaks, wind leaks, EGR leaks and more. The UltraTrace UV Smoke solution leaves a UV light-traceable mark. The tester features a graduated smoke-control valve and flow meter and can be used with shop air or inert gases.