CO2 / Humidity / Temperature Meter with SD Card Data Logger

The Lutron MCH383SD is a combined handheld CO₂, humidity, and temperature meter with a built-in SD card data logger. It has a large easy to read LCD display and comes complete with a CO₂ probe and power supply, although the unit can also be powered with 6 AAA batteries. The built in SD card data logger will take SD cards with a capacity of up to 16GB. There is no need for special datalogging software. You just slot the SD card into your laptop or PC and download the data to a spreadsheet for analysis.