24/7 Technical Support
TSI 8551 Q-TRAK W/CO IAQ Get Quote



The Q-Traks simultaneously measure Carbon Dioxide, Carbon Monoxide, temperature and relative humidity. Use the Q-Traks in survey mode to obtain real-time readings while surveying areas of interest and to pinpoint potential problem areas or in standard logging mode to automatically take and store measurements. For trend recording, use the customized logging mode for unattended operation with data taken automatically and stored into memory. The powerful TrakPro Data Analysis Software enables statistical analysis, data graphing and report generation. Readings are displayed one at a time on the Model 8551 Q-Trak. The Model 8554 Q-Trak Plus displays all four parameters simultaneously and has 33 days of datalogging memory at one-minute intervals; otherwise, the specifications are identical.

Key Features

  • Monitors Four IAQ Parameters
  • Survey and Datalogging Modes

Technical Specifications

Sensor CO2: Non-dispersive infrared (NDIR) CO: Electro-chemical Temperature: Thermistor Humidity: Thin-Film capacitive
Range CO2: 0 to 5000 ppm CO: 0 to 500 ppm Temperature: 32 to 122F Humidity: 5 to 95% RH
Accuracy CO2: ± 3% of reading and ± 50 ppm CO: ± 3% of reading or ± 3 ppm, whichever is greater Temperature: ± 1.0 F Humidity: ± 3%
Response Time CO2: 20 seconds CO: <60 seconds to 90% of final value Temperature: 30 seconds Humidity: 20 seconds
Datalogging 63,000 data points
Power 4 AA batteries, 13.5 hours operation, or AC adapter


  US Metric
Dimensions 7.2 x 4.2\" x 1.5\"\" 183 x 107 x 292 mm


  US Metric
Weight 1.3 lbs 0.590 kg


Calibration Gas
Calibration Gas