Appendix B | B-1
5100 HD CONFIGURED FOR REFINERY FLARE GAS
The 5100 HD TDLAS analyzer may be ordered in a dual-sample-cell, dual-
range-H
2
S conguration as AMETEK part number 9000-161-VE. This version of
the analyzer includes two optical sampling cells:
• Standard, two-pass sample cell for a measuring range in terms of percent
by volume (e.g. 0-10% or 0-60% vol/vol). The accuracy for this measure-
ment is +/- 2% of the range.
• Multi-pass, “Herriott” sample cell for a measuring ppm ranges (e.g.
0-300 ppmV). The accuracy here is +/- 15 ppmV.
Two laser diodes are used – one for each measuring range. The 5100 HD em-
ploys the same laser device for both ranges, but dierent wavelengths are used
to ensure an optimal match of absorption strength and sample cell path length for
each range.
The following two pages show a general arrangement drawing for this congura-
tion of the 5100 HD. A heated sample line entry boot is used for both the process
gas inlet and return to process lines. Unlike other 5100 HD versions, there is no
membrane separator/lter included in the analyzer oven. Accordingly, there is no
drain port or valve. The only operational maintenance is cleaning of the sample
cells as necessary.
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