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TSI IAQ-Calc Indoor Air Quality Meters

Models 7515, 7525, 7535 and 7545

TSI's IAQ-CALC Meters are outstanding instruments for investigating and monitoring indoor air quality (IAQ). The Model 7515 is a cost-effective meter for carbon dioxide (CO2) measurements. The Model 7535 adds data logging of CO2. The Models 7525 and 7545 simultaneously measure and data log multiple parameters. The Model 7525 measures CO2, temperature, humidity, and calculates dew point, wet bulb temperature, and % outside air. The Model 7545 adds carbon monoxide (CO).


  Verify building HVAC system performance
  Examine building IAQ conditions to optimize worker productivity
  Comply with regulations and guidelines

Features and Benefits

  Low-drift NDIR CO2 sensor for stable, accurate readings
  Sampling function records multiple point measurements
  Ergonomic, overmolded case design

Models 7525 and 7545

  Temperature and relative humidity measurements help determine thermal comfort
  Calculates % outside air from either CO2 or temperature
  Directly calculates dew point and wet bulb temperatures
  Electrochemical sensor measures CO (Model 7545)
  Models 7525 and 7545 shows up to three parameters
  Models 7515 and 7535 shows only one parameter
  The model 7525 meets the British Standard for the monitoring of CO2 in catering facilities (BS8494)

Data Logging-Models 7525, 7535 and 7545

  Simultaneously records all parameters and logs samples with time and date stamp
  Model 7525 logs up to 24,200 data points with all measured parameters enabled
  Model 7535 logs up to 40,300 data points with all measured parameters enabled
  Model 7545 logs up to 22,000 data points with all measured parameters enabled
  TSI LogDat 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

Data Sheet

Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.

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TSI Instruments

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4000 Series Mass Flowmeters for Gases


7565 Q-TRAK IAQ Monitor
8375 ACCUBALANCE Capture Hood
9555 VELOCICALC Ventilation Meter
PAN300 Series Duct Leakage Testers

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