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This unit has been discontinued as of December 31, 2011.
TSI's IAQ-Calc™ Indoor Air Quality Meter 7535 is an outstanding instrument for investigating and monitoring indoor air quality (IAQ). The 7535 model is a cost-effective meter for carbon dioxide (CO2) measurements. The proprietary TSI LogDat2 software permits easy transfer of data to a computer. Data can be reviewed on-screen, or downloaded to a computer for easy report generation. Statistics function displays average, maximum and minimum values, and the number of recorded samples.