The data logger TR-76Ui-H is a three-channel recorder designed to simultaneously measure and record CO2 concentration, temperature, and humidity. The model achieves a temperature measurement accuracy of ±0.3°C between 10° and 40°. The accuracy is ±0.5°C at all other temperatures. The overall range is -30° to 80°. According to the manufacturer, automatic atmospheric pressure adjustment for the measurement location ensures more stable and accurate CO2 measurements. The unit has a CO2 range up to 9,999 ppm. The data logger has a capacity to store up to 8,000 data sets and is supplied with software which enables the user to download recorded data to a PC via USB connection, whereby data from all three channels can be simultaneously viewed in graph or table form. It can be used with the handheld data collector TR-57DCi with graphical display to collect recorded data from the TR-76Ui-H via infrared communication and immediately check the collected data on the spot. For monitoring in locations where electrical outlets are not available, this unit can also measure and record when operating under battery power. The product package includes the data logger unit, sensors, USB cable, batteries, and software.