TR-76Ui-S Three-channel Data Logger for recording CO2 concentration, temperature (-25 to 70°C) and humidity (0 to 99%RH)

The TR-7Ui series, with a simple USB connection to your PC, provides an easy way to make detailed settings and download data. Basic settings and REC start/stop can also be done by simply pressing buttons on the units themselves.
TR-76Ui-S is a three-channel data logger designed to measure and record CO2 concentration, plus high precision temperature and humidity. The CO2 warning notification feature helps provide a standard for timing ventilation in classrooms and buildings. This model comes with a high precision temperature-humidity sensor, making it perfect for situations where strict temperature and humidity control is required in addition to the CO2 measurement.