The modular CO2 transmitter EE870 from E+E Elektronik now measures CO2 concentration up to 5% CO2 (50,000 ppm). The extended measuring range makes the EE870, consisting of CO2 probe, conversion board and connection cable, even more versatile. The interchangeable CO2 probe EE871 with auto-calibration uses an infrared measuring principle (dual wavelength NDIR operation principle) that is particularly insensitive to pollution. Aging effects are compensated automatically, resulting in excellent long-term stability. Thus the CO2 transmitter is ideal for demanding applications.