Collection Care at ISEAS Library: Thermo-hygrographs

You may have spotted these devices in the Library. Ever wondered what they are?

Thermo-hygrographs measure temperature (thermo) and relative humidity (RH, the hygro- aspect) in the air. These sensitive devices can measure the temperature and RH at their surrounding areas, recording the readings onto a chart. Like any sensitive measuring device, they’re regularly calibrated to enhance accuracy.

Every week, ISEAS Library Technician Ramli Mohamed makes his rounds across the five floors of the Library to collect the data recorded on 10 thermo-hygrographs, and check for any irregularities. Different types of materials are best stored at different temperatures and RHs, so data from these charts help Ramli and Library staff monitor trends and keep conditions optimal for our library materials.

Together, Ramli and these thermo-hygrographs contribute to the Library’s ongoing efforts to care for our collection.

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