UL94 flame chamber Features: User-friendly design and reliable in performance Well-painted; black wall and large transparent window for better observation. Color touch screen can be selected to record the ignition/after flame/after flame time. Equipped with solenoid control gas valve, air flow meter, pressure regulating valve and pressure water column. A digital timer with an accuracy of 0.1S. This UL-94 apparatus is equipped with exhaust device for exhaust emission . The testability items include HB,V, HBF,5V and VTM and etc. Details operation manual & video for UL 94 flammability test procedure. http://burningtester.com/products/textile_flammability_tester/597.html