An Intrinsically Pressure Insensitive Low Cost Particle Number Diluter Featuring Flow Monitoring

An Intrinsically Pressure Insensitive Low Cost Particle Number Diluter Featuring Flow Monitoring

Blog Article

We present a low cost Particle Number (PN) diluter including mass flow monitoring.The device consists of a commercial hypodermic needle, a High Efficiency Particulate Air (HEPA) filter.and a custom-made flow sensor.

The flow sensor is used Lacquer to monitor the diluter’s performance and enable in-time replacement of the low cost elements used.Neither the sampling flow Canopy Rangehoods rate nor the pressure drop drastically change the dilution factor introduced by the presented device.This makes the presented device especially useful for particle number measurements at positions close to the tailpipe of internal combustion engine powered vehicles, where aggravating, fast pressure pulsations complicate correct sampling.