Model 4500 MkIII Compliance Opacity and Dust Monitor

Key Features

  • Lifetime warranty on LED light source
  • 3-year warranty on transmissometer
  • No continuously moving parts
  • Patented all-glass multi-prism retroreflector
  • Patented flood LED
  • Optional fail-safe shutters
  • Auxiliary Function Unit (AFU)
  • Adaptor flanges and spoolpieces
  • Control Room Unit (option)
  • Single Purge Blower
  • Wide operating temperature range
  • Auxiliary Power Supply (APS)


The Land Model 4500 MkIII has reset the industry standard on compliance opacity and dust concentration measurement. Combining the unique features of three patented technologies, the 4500 MkIII achieves the highest available specification for the principal performance parameters, as defined by the internationally recognized ASTM Standard D 6216-07.

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