TSI Alnor

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  • CO2
    • Range: 0 to 5000 ppm
    • Accuracy: ±3.0% or ±50 ppm, whichever is greater
    • Sensor Type: Dual-wavelength NDIR
  • CO
    • Range: 0 to 500 ppm
    • Accuracy: ±3.0% or ±3 ppm, whichever is greater
    • Sensor Type: Electro-chemical
  • Temperature
    • Range: 32 to 140°F (0 to 60°C)
    • Accuracy: ±1.0°F (±0.6°C)
    • Sensor Type: Thermistor
  • Relative Humidity
    • Range: 5% to 95% RH
  • Accuracy: ±3.0% RH
    • Sensor Type: Thin-film capacitive
  • NIST Certificate Included
  • Calculates % outside air, dew point & wet bulb temperature
  • Data logs up to 26,900 data points with all measured parameters enabled
  • Log intervals: 1 second up to 1 hour (user selectable)

What's in the Box

  • Meter and probe
  • Logdat2 software
  • USB cable
  • AC adaptor
  • Hard carrying case
  • Batteries
  • Manual
  • NIST certificate

The TSI Alnor IAQ-CALC 7545 meter is an outstanding instrument for investigating and monitoring indoor air quality. The 7545 simultaneously measures and data logs multiple parameters including CO, CO2, temperature, humidity and is capable of performing calculations such as dew point, wet bulb temperature, and % outside air. With such a wide range of functions in a handheld meter, the 7545 is an excellent choice for a wide range of applications such as verifying HVAC system performance and to ensure compliance with IAQ regulations and guidelines.

The TSI Alnor IAQ-CALC 7545 meter utilizes stable, accurate sensors and displays up to three parameters simultaneously. An internal data logger feature logs up to 26,900 data points with all measured parameters enabled. Data can also be easily transferred to a computer with the included LogDat2 software which facilitates easy report generation and includes a statistics function that displays average, maximum and minimum values, and the number of recorded samples.


TSI Alnor VOC Probes
Volatile organic compounds, pre-calibrated, plug-and-play IAQ probes


TSI Alnor Gas Regulator
Gas regulator (0.3 lpm) for all gas calibration kits
TSI Alnor Calibration Collar
Provides closed area around gas probes for calibration
TSI Alnor Calibration Kits
Calibration kits for TSI Alnor IAQ meters
TSI Alnor Calibration Gases
Span calibration gases, zero calibration gases, as well as standard ppm concentrations are available for TSI Alnor meters


Please consider these optional accessories.

TSI Alnor IAQ Probe Stand
Stand designed for TSI Alnor indoor air quality (IAQ) probes


This product can be used in the following applications: