6.3.3. Monitoring and recording incubator relative humidity when maintaining adult workers in the laboratory

Small changes in ambient weather, as well as the opening of the incubator door, can significantly affect incubator relative humidity, especially when the total volume of the chamber is greater than one litre (Rockland, 1960; Winston and Bates, 1960). Because of this, an accurate, reliable data recorder or a digital measuring device should be used to document relative humidity, as well as temperature, over time. Numerous types of equipment are available, such as the iButton (Maxim Integrated Products, San Jose, United States) or HOBO (Onset Computer Corporation, Cape Cod, United States).