Tinytags provide environmental monitoring in local authority archives, recording temperature and humidity to help ensure the preservation of historic documentsand artefacts. Recording conditions over time also helps ensure compliance withthe requirements of the National Archives. The material stored is mainly paper and parchment but there are also some photographs and glass plates. Four Tinytag Ultra 2 temperature and relative humidity loggers are used to monitor conditions in the strong-room. Readings are checked every two weeks to spot any major fluctuations and identify what might be causing any variation.

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