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DescriptionThe CTH100 thermo-hygrograph chart recorder provides an economical way to read and record both temperature and relative humidity, without the need to install expensive sensors. This portable, battery-operated recorder offers simultaneous recording on its 6.6" (167 mm) easy-to-read circular chart. Three models are available based on recording time - 1 day, 8 days, or 32 days. Its neat appearance and compact size make it ideal for a number of applications in a variety of locations: laboratories, wineries, warehouses, computer rooms, museums, hotels, restaurants, factories, textile mills, paper mills, construction sites, greenhouses, mushroom cultivation farms, and home gardens.