DESIGNATION NUMBER : EQOA-0880-047

IDENTIFICATION :     "Thermo Electron Model 49 U.V. Photometric Ambient
O3 Analyzer", operated on a range of either 0 - 0.5 or 0 - 1.0 ppm, with
or without any of the following options:

                     49-001 Teflon Particulate Filter
                     49-002 19-inch Rack Mountable Configuration
                     49-100 Internal Ozone Generator for Zero, Precision
                            and Level 1 Span Checks
                     49-103 Internal Ozone Generator for Zero, Precision
                            and Level 1 Span Checks with Remote
                            Activation
                     49-488 GPIB (General Purpose Interface Bus) IEEE-488

SOURCE :             Thermo Environmental Instruments, Inc.
                     8 West Forge Parkway
                     Franklin, MA 02038

 MANUAL
   OR      :         Automatic
AUTOMATIC

REFERENCE
   OR      :         Equivalent
EQUIVALENT

FEDERAL VOLUME       REGISTER PAGE        NOTICE DATE
--------------       -------------        -----------
     45                   57168             8/27/80