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A portable Trimix Analyzer designed to ensure the correct mix of helium, oxygen and nitrogen for technical diving. This easy-to-operate diving instrument analyzes mixes, automatically correcting for environmental conditions and eliminating the risk of errors from manual calculations. It has a large backlit LCD display that is easily read even in low light conditions, and which provides additional information such as a Maximum Operating Depth calculation. The features make the Trimix 4001 one of the best nitrox analyzers on the market for diving oxygen analyzers. Displays O2, He and balance (0-100%) Automatically adjusts for environmental conditions to avoid risk of nitrogen narcosis during dives down to 46 meters Includes temperature, barometric pressure and RH sensors Long life battery with 16 hours of use, with two-hour charge time 15-minute auto-off feature to save battery Watertight, IP65 enclosure Measurement range 0-100% Helium, 0-100% Oxygen Accuracy ±2% of range at constant conditions Response time ±2% of range at constant conditions Sensor model He: AII-41-100, O2: AII-11-75D Sensor life He: 10 years, O2: 60 months in air Calibration interval Prior to use with ambient air or a known concentration of oxygen Inlet pressure <5 psig with 1-2 SCFH or open tank valve slowly until hissing sound Ambient pressure (extract sample with optional integral pump) Display Backlight LCD 6.4 x 6.4cm (2.5 x 2.5”) Dimensions 221 x 190.5 x 96.5mm (8.7 x 7.5 x 3.8") Ingress protection Watertight case (when closed) IP65 Compensation Temperature, barometric pressure, relative humidity Storage temperature 0°C to 50°C (32°F to 112°F) 50°C intermittently Operating temperature Operating temperature Power Rechargeable battery, 9 V DC from 110/220 V AC (can charge battery in 2 hours). Optional 12 V DC car charger.