The Collaborative International Dictionary of English v.0.48:

Analyzer \An"a*ly`zer\, n.
   1. One who, or that which, analyzes.
      [1913 Webster]

   2. (Opt.) The part of a polariscope which receives the light
      after polarization, and exhibits its properties.
      [1913 Webster]

WordNet (r) 3.0 (2006):

analyzer
    n 1: an instrument that performs analyses [syn: analyzer,
         analyser]

Moby Thesaurus II by Grady Ward, 1.0:

21 Moby Thesaurus words for "analyzer":
   analyst, assayer, breaker, centrifuge, cutter, essayer, examiner,
   experimenter, gas analyzer, mass spectrograph, mass spectrometer,
   research worker, researcher, scanner, separator, sieve, stripper,
   test driver, test pilot, tester, tryer-out