TSI Alnor

Not in stock. Usually ships in 2-3 weeks [?]

Need Help? Call 1-800-884-4967
Mo-Th 8am to 5:30pm. Fr 8am to 5pm ET


  • CO2
    • Range: 0 to 5000 ppm
    • Accuracy: ±3.0% or ±50 ppm, whichever is greater
    • Sensor Type: Dual-wavelength NDIR
  • 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 30,300 data points with all measured parameters enabled
  • Log intervals: 1 second up to 1 hour (user selectable)

What's in the Box

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

The TSI Alnor IAQ-CALC 7525 meter is an outstanding instrument for investigating and monitoring indoor air quality. The 7525 simultaneously measures and data logs multiple parameters including 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 7525 is an excellent choice for a wide range of functions such as verifying HVAC system performance and to ensure compliance with IAQ regulations and guidelines.

TSI Alnor model 7525 IAQ-CALC meters utilize stable, accurate sensors and displays up to three parameters simultaneously. An internal data logger feature logs up to 30,300 data points with all measured parameters enabled. Data can be easily transferred to a computer with the included LogDat2 software. The software also facilitates easy report generation and includes a statistics function that displays average, maximum and minimum values, and the number of recorded samples.


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: