Patent ID: 7894060
Filing Date: 2011-02-22
Classification: G01N

Abstract:
1. A modular dust measuring device for the determination of a foreign body concentration in a gas having at least one optical sensor head which has a light transmitter and a light receiver and having a central unit which has an evaluation unit and a scavenging air unit, further comprising: the evaluation unit having a capability of determining the foreign body concentration with the help of a scattered light intensity or transmitted light intensity recorded by the light receiver and wherein the scavenging air unit can supply the sensor head with scavenging air to avoid or eliminate impurities or deposits; and the sensor head comprising a sensor module and the central unit comprising a central module, wherein the evaluation unit has a capability of evaluation and control of multiple sensor modules of different measurement principles, the sensor module interchangeably connected to the central module by standardized data interfaces and connections and the scavenging air unit having a configuration to make scavenging air available in the required quantity and with the required effective pressure for the multiple sensor modules of different measurement principles.