Thermo Scientific EPM 300 Dilution Probe Data Acquisition Unit

DESCRIPTION

The Thermo Scientific Scientific In-situ Dilution Probes, EPM 300 Series are designed for wet basis measurement using dilution extractive technology. The critical functions performed by the Series EPM 300 prepare the sample from the stack so that it can be accurately and precisely measured by the analyzer. Using an air-driven aspirator, the system extracts the sample from the stack. The sample then passes consecutively through a coarse filter, a fine particulate filter, and a glass or quartz critical orifice. Lastly, the sample is diluted with air from the aspirator, creating positive pressure in the sample line as it prepares for transport to the analyzer. This dilution process reduces the dew point of the stack gas to below that of the ambient air. The processed sample can then be transported to the analyzer up to 300 feet via an unheated sample line. (Heated sample lines may be required for low temperature applications.) In addition, a sample pump is not required for sample lines less than 300 feet which helps to reduce costs and increase up-time. The critical orifice determines the flow rate with which the sample is extracted from the stack. The EPM 300 Series offers a selection of three different orifice materials, including 7 glass, 5 quartz or 5 Monel orifices, all of which permit easy exchange to accommodate different dilution ratio requirements. The process of sample dilution, as utilized by the EPM 300 Series, promotes the filter longevity and reduces maintenance. In-Situ calibration is easy with the EPM 300 Series Probe. The calibration gas is supplied via the umbilical cord to the stack mounted probe. Then, calibration gas enters the probe and is diluted at the same dilution ratio as the sample from the stack. The calibration line is also used to provide blow back air to the coarse filter for cleaning purposes.