Miniaturised Flame Ionisation Detector for Explosion Protection in Civil Sewerage Networks

An autonomous flame ionization detector for emission monitoring

“…This can be best explained by the example of the FIDEX project (Förster et al, 2017a). This project dealt with monitoring the sewerage systems for formation of an explosive atmosphere.…”

“…The compositions of the used sample gases are given in Table 1. It should be noted again that the concentrations of hydrocarbons in the sample gases are much higher than commonly used to determine response factors of FIDs and do not comply with the values recommended in corresponding norms (DIN EN 12619:2013-4;DIN EN 15267-3:2008-03) due to the project context in which the FID was first developed (Förster et al, 2017a). Therefore, the determined response factors give a valuable insight into the sensitivity of the FID towards different hydrocarbons, but do not state a compliance with actual regulations yet.…”

“…Previous characterization of the µFID revealed not only reduced gas consumption compared to conventional FIDs, but successful operation of the µFID with electrolysis only as well (Förster et al, 2017a, b). Furthermore, during these characterizations the sensitivity of the µFID was analyzed as a function of the sample gas flow for different burning gas flows (Förster et al, 2017a). Compendious results of these characterizations are plotted in Fig.…”

“…It was shown that sensitivity of the µFID increases with rising burning gas flows and that the sensitivity first increases with rising sample gas flow and decreases again with further rising sample gas flows. This behavior indicates a varying efficiency of the burning process due to different mixing of the gas flows in the burning chamber of the µFID (Förster et al, 2017a;Kuipers, 2011).…”

“…All these requirements are fulfilled by the flame ionization detector (FID) (Förster et al, 2017a). The FID is very sensitive and selective towards hydrocarbons and insensitive towards environmental conditions.…”