Ranges: 0-100% LEL (Infrared) 0-100% Vol flammable (Infrared) 0-25% Oxygen (O2) 0-20% Carbon Dioxide (CO2) Infrared 0-1000 ppm Carbon Monoxide (CO) ***************************************************************** The new GMI - SHIPSURVEYOR instrument is designed to provide a solution for all your safety monitoring and inerting marine application requirements. With 7 models to choose from, this extremely versatile instrument comlpies with international marine regulations for Confined Space Monitoring, Inerting, Pre-entry Testing, Tank Cleaning and many other marine appilications in vessels such as LNG / LPG Tankers, Oil Tankers, Fruit Carriers and Refrigerated Cargoes.