NINE SOLVENTS
Sampling Point
Sampling 0 3 Point
Sampling
Sampling
Sampling
Sampling
Point
Point
Point
Point
5
6
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F RDMRIIXTIRIF ViPDRS KFPT REinW EXPLOSIVE IIMITC
wiTU rnuTiMiiniio AMAIY7FRÇ
Delays in detecting
LEL
reduced
In a process using nine solvents with lower explosive limits ranging from 1.3% to 1 3 % , a P-E T R I - N O N ° Infrared Analyzer has the job of reporting vapor concentrations continuously so they can be kept below 8 0 % of the explosive limit. The T R I - N O N analyzer is sensitized to give an equal and linear response for each of the nine solvents. This linearity allows summation of the various combinations at each station regardless of the actual vapor concentration of any one component. Only an infrared analyzer using a selective detector can be sensitized in this manner. One T R I - X O N analyzes samples from six different points in succession along the process line at a speed of 30 seconds per point. Each point is checked every 3 minutes — often enough in this particular application to detect any dangerous change in vapor concentration. (Instrument response times up to 3.4 seconds for 9 8 Çc of final value are standard.) T h e TRI-NON is the only infrared analyzer with sufficient speed and stability to cover so many sampling points safely. In combustible vapor analysis, whether the system con-
Perkin-Elmer CORPORATION Norwalk, Connecticut
tains one or a mixture of solvents, the TRI-NON provides t h e best zero and range stability available. It does not run into trouble when non-hydrocarbon materials are present in samples. Since it does not burn in order to analyze, deposits d o not form in the detecting element and flash-back protection is unnecessary. Maintenance problems are kept to a minimum. When yon specify continuous analyzers for your process streams, P-E alone has a complete line of instruments to choose from. Or let us develop a complete analytical control system for you. Nowhere else can you get the combination of chemical engineering and instrument know-how that you'll
find
at
P-E.
.T.M.
T h e
perkin-Elmer
Corp.
( fc* ) P-E T R I - N O N A n a l y z e r s a r e x j _ _ ^ / available in a wide range of models and prices to meet all types of continuous analytical problems. They are rugged and dependable, expressly designed for use in the varied environments of a processing plant or refinery. For quick and easy maintenance, instrument components can be tested right on stream — without disconnecting. JAN.
9,
1956
C&EN
159
