TSI / Airflow 7525 | Indoor air quality meter

The TSI / Airflow 7525 instrument is the ideal tool for accurately measuring indoor air quality (IAQ) quickly and accurately using a single probe.  This model is able to simultaneously measure and data log CO₂, temperature, and humidity

Features

Features and benefits 

• Low-drift NDIR CO₂ sensor for stable, accurate readings
• Sampling function records multiple point measurements
• Ergonomic case design
• Temperature and relative humidity measurements which helps determine thermal comfort
• Directly calculates dew point and wet bulb temperatures
• Displays up to three measurement or calculated parameters
• 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

Technical

Carbon dioxide (CO₂):

Sensor type     Dual-wavelength NDIR (non-dispersive infrared)

Range       0 to 5,000 ppm

Accuracy      1 ± 3.0 % of reading or ± 50 ppm, whichever is greater

Resolution      1 ppm

Response time  20 seconds

Temperature:

Sensor type      Thermistor

Range      0 to 60 °C

Accuracy      ± 0.5 °C

Resolution      0.1 °C

Response time      30 seconds (90 % of final value, air velocity at 2 m/s)

Relative humidity:

Sensor type      Thin-film capacitive

Range      5 % to 95 % rh

Accuracy      2 ± 3.0 % rh

Resolution      0.1 % rh

Response time       20 seconds (for 63 % of final value)