Southern Analytical, Inc.
19407 Oil Center Boulevard
Houston, Texas 77073

Phone: (281) 591-0800
Fax: (281) 591-0052

Toll-Free: (888) 591-6300

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Sulfur Recovery Unit (Claus SRU)

AMETEK's No Sample Line technology for the sulfur pit. The 881-NSL has no costly troublesome external sample line. The analyzer mounts directly on your sulfur pit lid, eliminating sample line plugging, the number one problem in Claus Plant analysis. The 881-NSL photometer combines an extraordinary long lamp life (estimated 5 years!) with many innovative features designed to minimize maintenance and increase reliability. The 881-NSL is equipped with anti-clogging blowback features. Any out-of-range condition automatically initiates air blowback to clear the sample system. This feature minimizes the chance of costly downtime by reducing sample line plugging. The analyzer continuously monitors itself for proper operation and has built-in alarm features.

H2S is entrained in liquid sulfur as it runs into the sulfur pit. Polysulfide compounds in the liquid sulfur break down with time to release H2S. H2S from these sources collects in thevapor space above the sulfur where it could exceed the lower explosive limit. To prevent an explosion, most pits are air purged to keep H2S levels low. Compressed air is expensive, and most plants run with an excessively low H2S level to be on the safe side. The AMETEK 881-NSL Sulfur Pit Analyzer measures H2S in the vapor space above the sulfur pit. Substantial cost savings can be made using this reliable analyzer to control the H2S level giving an adequate safety margin. Some customers also want to measure SO2 in the sulfur pit, reasoning that the presence of SO2 may indicate an incipient fire.

Product PDFs:

• Model 881 NSL Sulfur Pit Analyzer