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Zefon International, Inc. :: Portable Instruments :: IAQ Instruments :: TSI IAQ-CALC Indoor Air Quality Meter

TSI IAQ-CALC Indoor Air Quality Meter  
TSI IAQ-CALC Indoor Air Quality Meter 
Printable version

TSI’s IAQ-CALC™ Meters are exceptional indoor air quality instruments for investigating and monitoring building air quality. These IAQ instruments simultaneously measure and data log multiple parameters to monitor indoor air quality conditions. The Model TSI-7525 measures CO2, temperature, humidity, and calculates dew point, wet bulb temperature, absolute humidity, humidity ratio and % outside air. The Model 7545 IAQ meter adds CO.

Features & Benefits:

  • Easy to use, accurate and reliable
  • Take and record measurements for IAQ thermal comfort studies
  • Temperature and relative humidity measurements help determine thermal comfort
  • Calculates % outside air from either CO2 or temperature
  • Directly calculates dew point, wet bulb temperature, absolute humidity and humidity ratio
  • Electrochemical sensor measures CO (Model TSI-7545)
  • Two-line display shows two parameters simultaneously
  • Simultaneously records all parameters and logs up to 14,000 samples with time and date stamp
  • TSI LOGDAT™ software permits easy transfer of data to a computer
  • Data can be reviewed on-screen, printed or downloaded to a computer for easy report generation
  • Statistics function displays average, maximum and minimum values, and the number of recorded samples


Sensor Type Thermistor
Range 32 to 140°F (0 to 60°C)
Resolution ±1.0°F (±0.6°C)
Accuracy 0.1°F (0.1°C)

Relative Humidity
Sensor Type Thin-film capacitive
Range 5% to 95% RH
Resolution ±3.0% RH
Accuracy 0.1% RH

Dew Point
Range 5 to 120°F (-15 to 49°C)
Resolution 0.1°F (0.1°C)

Carbon Dioxide CO2
Sensor Type Dual-wavelength NDIR
(non-dispersive infrared)
Range 0 to 5000 ppm
Resolution 1 ppm
Accuracy ±3.0% of reading or ±50 ppm
(whichever is greater)

Carbon Monoxide CO - Model TSI-7545 Only
Sensor Type Electro-chemical
Range 0 to 500 ppm
Resolution 0.1 ppm
Accuracy ±3.0% of reading or ±3 ppm
(whichever is greater)
Response Time <60 sec to 90% step change

Additional Information Available

1. Download Product Data Sheet

This product is available for shipment within the USA only

Manufacturer TSI
U/M Each
Stock Status Normally Ships within 24 hours

Product Price Order

  IAQ-CALC Meter
  Product #: TSI-7525


  IAQ-CALC Meter with CO
  Product #: TSI-7545


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