Operating under the Bernoulli principle, the SEMTECH® HTF uses four high performance, dual stage, differential pressure transducers, sampling continuously at up to 5 kHz, measuring every pressure pulse from an engine. The sensors are housed in a heated manifold, eliminating thermal drift. The eight combined differential pressure ranges span nearly five orders of magnitude, allowing accurate measurements over a wide range of flow rates.
The exhaust sample is filtered and dried directly at the exhaust flow tube, with an additional dryer located in the control module. The intake manifold on the control module is custom built of stainless steel, to mitigate leaks. The gas analyzer uses non-dispersive infrared (NDIR) technology, incorporating a heated sample cell and relative humidity sensor, along with the interface electronics and control electronics.
Available Tube Sizes and Flow Rates