CAS Data Loggers recently provided the data logging solution for a small greenhouse currently cultivating several species of herbs for cooking and medicinal purposes. From potting to product, each variety has to be kept at ideal growing conditions before sale. From his own experience, the owner preferred to maintain the crop around 70°F (21°C) and an 80% relative humidity. Last year he had already installed a climate control system, but its effects were heavily localized rather than evenly spread out. Rather than having to keep checking thermometers placed around the walls, the owner wanted to use data loggers to record and save enough readings to get a realistic temperature and humidity profile to find these colder and drier zones. Once he could see this profile, he would be able to check all current readings against this accurate baseline.