With most people spending the majority of their time indoors, air quality plays a critical role in health, comfort, and productivity. Indoor air quality monitoring helps identify risks and maintain safe, efficient environments in workplaces, homes, and commercial buildings.

TSI indoor environmental quality (IEQ) instruments provide accurate, easy-to-use, and reliable monitoring solutions, helping organizations improve working conditions, enhance productivity, and support energy-efficient operations.


With most people spending the majority of their time indoors, air quality plays a critical role in health, comfort, and productivity. Indoor air quality monitoring helps identify risks and maintain safe, efficient environments in workplaces, homes, and commercial buildings.

TSI indoor environmental quality (IEQ) instruments provide accurate, easy-to-use, and reliable monitoring solutions, helping organizations improve working conditions, enhance productivity, and support energy-efficient operations.

  • Reversible 4-inch (100 mm) head
  • Calculates volumetric flow rate
  • Sampling function records multiple point measurements
  • Automatic averaging of air velocity
  • Simultaneously displays velocity and temperature
  • Logs 12,700+ samples with a time and date stamp
  • Simple to operate
  • Measurement range: 0-30 m/s
  • Measure temperature and velocity
  • Calculates volumetric flow and standard velocity
  • Ergonomic design and ultra light weight
  • Automatically senses and displays supply or return flows.
  • Back pressure compensation
  • Multiple hood sizes available
  • Detachable digital micromanometer
  • Measures and data logs multiple parameters such as CO₂, temperature, and humidity
  • It calculate dew point, wet bulb temperature and percent of outside air
  • Simultaneously displays CO₂, CO, temperature and humidity measurements
  • Calculates dew point, wet bulb and percent outside air
  • One instrument with multiple plug-in probe options including VOC’s and air velocity
  • Bluetooth communications
  • Measures PM1, PM2.5, PM10 size fractions and total particle concentration
  • Accommodates up to 6 optional, pre-calibrated gas sensors (e.g., CO, H2S, NO2, NH3, etc.)
  • Real-time temperature and barometric pressure density compensation for VOC and CO₂
  • Simultaneously measures and logs up to 20 IAQ parameters
  • Dry bulb, wet bulb, and globe temperature
  • WBGT (indoor/outdoor index)
  • Heat index (humidex)
  • Particulate, gas and photoionization detector (PID) measurement from a single device
  • Temperature, Relative humidity, CO₂, VOC
  • Built-in sampling pump
  • Rotary impactor
  • 90° Light-scattering laser photometer
  • Real-time ultrafine particle counter
  • Concentration range: 0 to 5 × 10⁵ particles/cm³
  • Solves tough IAQ problems
  • Easy to use
  • Data log information
  • Measuring range: 0 to 99999 Lux.
  • Ideal for spot checks of lighting conditions in workplaces.
  • Includes hold function, min/max value display, and protective cap for storage.
  • Sensor modeled on the human eye’s spectral sensitivity.
  • Small, lightweight, and easy to carry.