Customers place these circular chart temperature / humidity recorders in refrigerated storage facilities, office and manufacturing environments, greenhouses and live animal production facilities. These circular chart temperature / humidity recorders provide simultaneous monitoring of both temperature and relative humidity, or temperature only, with different chart speed models available, ranging from 6 hours to 31 days for models 14007-14009 only. Each model is available in either °F or °C scale.

On the temperature / humidity circular chart recorder, a red pen tracks temperature and a blue pen tracks humidity measurements, permanently recording them on a 6.6 inch diameter paper chart. The circular chart recorder runs on a single AA alkaline battery for approximately 1 year of continuous use. A keyhole slot is on the back of the unit for wall mounting, or the recorder can stand free on a flat surface.