What are the technical aspects of transformer oil sample bottles?

Transformer oil sample bottles must be made from materials that do not react with the oil, such as glass or specific plastics. They should be airtight to prevent contamination and moisture ingress, which can compromise oil quality. The bottles should be opaque to protect the oil from light exposure, which can degrade its properties. Additionally, proper labeling and volume specifications are essential for accurate sampling and analysis of the transformer oil.