Datalogger for indoor air quality analysis (IAQ). The instrument measures the quantities: airspeed, temperature, relative humidity, atmospheric pressure, CO2 (Carbon Dioxide) and CO (Carbon Monoxide). The SICRAM hotwire air speed probes, vane air speed probes, temperature probes, relative humidity and temperature combined probes can also be connected to the instrument. Memory capacity of 67,600 records for each of the two inputs. Logging interval from 15 seconds to 1 hour.