Intro4u2u

The lead acetate tape method for the detection of hydrogen sulfide (H2S) and Total Sulfur in gaseous streams is based on the established principle that H2S reacts specifically with lead acetate to form a brown lead sulfide stain.
The concentration of H2S is directly proportional to the rate of change of staining on the lead acetate tape. This principle is the basis for a number of ASTM methods, and is by far the most reliable and simplest way to measure H2S in process.
The analyzer moves the treated paper tape one section at a time. Depending on the sample concentration, the tape will begin to darken at a rate proportional to the concentration of H2S in the sample stream. The analyzer exposes a fresh section of tape to the sample inside the sample chamber every 3 minutes. GASI Analyzers are designed with the following in mind:
The lead acetate series of analyzers are third generation systems designed to meet increasing demands for low-level measurement in pipelines and process. The 6 models to choose from are the 801, 801W, 801WTS, 902 H2S, 902 TS and 902 H2S/TS.
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1. Low maintenance
2. Extended tape life
3. Fast speed of response (under 20 sec. to alarm)
4. Low power consumption
5. Optional total sulfur measurement
6. Multiple streams
7. Auto calibration
8. Remote communications