> The lost capsule is a density gauge, commonly used in mining and forms part of a level sensor. https://www.abc.net.au/news/2023-01-30/how-wa-authorities-sear

> The lost capsule is a density gauge, commonly used in mining and forms part of a level sensor. https://www.abc.net.au/news/2023-01-30/how-wa-authorities-search-for-radioactive-capsule/101906396 https://www.abc.net.au/news/2023-01-30/how-wa-authorities-se... ... possibly like this? https://www.vega.com/en-au/products/product-catalog/level/radiation-based https://www.vega.com/en-au/products/product-catalog/level/ra...