The measuring loggers are used to track the temperature and relative humidity conditions of a space. A logger must be placed approximately in the middle of the room height, free of any obstacles. It shouldn’t be placed in a corner or a closed space (e.g. a cabinet), where air can’t circulate. The logger should be placed so that it isn’t moved during testing. It ought not to be placed near objects that heat up, such as lights, hot-water pipes, computers, radiators or exterior walls (the heating effect of the sun). It also shouldn’t be attached to windows or metal, that would lower the temperature. A logger shouldn’t be placed too near a faucet, since it affects the relative humidity.