The Seetru Seeflex gauge is designed for use within the marine and offshore industries for tanks containing fl ammable liquids. The Seefl ex gauge meets the requirements of SOLAS (Safety Of Lives At Sea), and is also type approved by many worldwideshipping authorities including; Det Norske Veritas (DNV), RINA, Lloyds Register of Shipping, Nippon Kaiji Kyokai and Bureau Veritas. This gauge is commonly used for fuel oil, hydraulic oil and lubrication oil tanks of cargo shops and work boats.