Simple and accurate sampling conditioning for CEMs

The SPP-100 ETG PERMEATION sample conditioning systems are designed to prepare hot gas sample streams for high flow, high performance gas monitoring applications. The ETG SPP-100 permeation system will remove particulates, mists and water vapour from a gas stream without the loss of analyte gasses.

The first step in conditioning the sample is filtering out particulate and aerosols. The sample gas enters the ETG permeation system through a bulkhead fitting or in the case of a heated sample line, a sealing fitting and then through the filter. From the filter the sample gas passes through a heated sample pump, under positive pressure conditions a membrane is used enhancing the water removal capabilities. Depending upon your application, the filter can be run as either a coalesce, a particulate or just as a particulate filter simply by switching the inlet and outlet ports. After pumping, the sample enters the Nafion dryer. Gases pass down the length of the tubing by means of a temperature gradient. Water vapour is selectively absorbed and moves through the tubing walls driven by the difference in partial water vapour pressure on the opposing sides of the membrane. Dry purge gas entering the dryer at the sample outlet and provides a medium for the water vapour removal from the sample to be carried away. It also cools the outlet of the dryer producing a temperature gradient which will result in both a rapid vapour removal and decreased final dew point temperature.

The key advantages of the SPP-100 Permeation Stack probe compared with the traditional sampling system are that the instrument removes only water vapour from the gas stream, it continuously dries the sample and almost any gas up to 10 LPM can be processed.  The SPP 100 is easy to install, reliable and has low maintenance costs, the positive sample line pressure enables greater efficiency on water removal

the rugged permeation element provides improved sample flow and the sample pump is included