Value CL11 temperature/humidity sensor Temperature & humidity sensor Freestanding Wired & Wireless

The CL11 data logger evaluates air quality with the combined measurements of CO2, humidity, and temperature. These measurements are important to understand Indoor Air Quality (IAQ) in classrooms, conference and waiting rooms, as well as any indoor areas where people gather. A high concentration of carbon dioxide can develop quickly when closed rooms with insuffi cient ventilation are fi lled with people. Carbon dioxide (CO2) is a colorless and odorless gas that exists in the earth’s atmosphere and which is dangerous in high concentrations. The proportion of CO2 in natural ambient air is about 0.04 % or 400 ppm. Exhaled air contains approximately 3.8 % by volume CO2, which quickly mixes with the ambient air. When closed rooms are insuffi ciently ventilated, the levels of CO2 increase quickly leading to fatigue and loss of concentration for the rooms occupants. In order to initiate improvements to the air quality, for example by increasing the supply of fresh air, it is important to measure the key parameters of indoor air quality. These parameters are CO2, humidity, and temperature.