The Chauvin Arnoux CA1510 Indoor Air Quality CO2 Logger is a portable tool designed to monitor and ensure a healthy environment through both audible and visual alerts. Accurate and compliant with the latest air quality monitoring standards, the CA1510 measures CO2, temperature and humidity with up to one million readings stored internally. Carbon dioxide is a colourless, odourless gas making it difficult to detect, it can be the cause of headaches, nausea and difficulty concentrating. Temperature and humidity can also be a reason for low air quality and contribute to mould spores in the environment.