BBM   Easy set-up Highest efficiency No maintenance   BLOW-BY MEASUREMENT D2T markets a range of pendulum meters allowing you to measure the gas leak flow (« blow-by »). Adapted to automobile and industrial internal combustion engines. The « blow-by » phenomena starts when gas is put under pressure in the compression chamber, it escapes via the piston rings, liners, and valve guides to enter the engine crankcase. The measurement of the leaked gases is very important for the segmentation and distribution and allows parameter measurements in order to find the wear rate of a thermal engine.