Encyclopedia of Environmental Science and Engineering, Volume I and II

TABLE 1

Continuous monitor equipment

Vendors of single-pass transmissometers

Bailey Meter Leeds & Northrup

29801 Euclid Avenue Sumneytown Pike

Wickliffe, (H44092) North Wales, PA 19454

Cleveland Controls, Inc. Photomation, Inc.

1111 Brookpark Road 270 Polatis Avenue

Cleveland, OH 44109 Mountain View, CA 94042

De-Tec-Tronic Corp. Preferred Utilities Mfg.

2512 N. Halsted Street 11 South Street

Chicago, IL 60614 Danbury, CT 06810

Electronics Corp. of America Reliance Instr. Mfg.

1 Memorial Drive 164 Garibaldi Avenue

Cambridge, MA 02142 Lodi, NJ 07644

HABCO Robert H. Wager

85 Nutmeg Lane Passiac Avenue

Glastonbury, CN 06033 Chatham, NJ 07928

Vendors of double-pass transmissometers

Environmental Data Corp. Land Combustion International

608 Fig Avenue 2525-B Pearl Buck Road

Monrovia, CA 91016 Bristol, PA 19007

Lear Siegler, Inc.

74 Inverness Drive East

Englewood, CO 80110

Research Appliance Co. Same instrument Contraves Goerz Corp.

Chemed Corp. 301 Alpha Drive

Route 8 Pittsburgh, PA 15238

Gibsonia, PA 15044

Dynatron, Inc. Same instrument Western Precipitation Div.

57 State Street Joy Manufacturing Co.

North Haven, CT 06473 PO Box 2744 Terminal Annex

Los Angeles, CA 90051

Datatest, Inc.

1117 Cedar Avenue

Croydon, PA 19020

Amperometric analyzers, also called coulometric

analyzers, measure the current in an electrochemical

reaction. They are susceptible to various interferents;

however, they are useful for SO 2 , H 2 S, and mercaptan

analyses.

Conductimetric analyzers for SO 2 determinations mea-

sure the change in the electrical conductivity in water after

a soluble substance is dissolved in it. This is a non-specific

method, therefore interfering gases must be removed prior to

introduction to the monitor.

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