The Handi is the #1 choice for ease, convenience, and portability with the oxygen analyzer and sensor all in one compact unit. Analyze your Nitrox mix with your choice of optional flow metering devices; the GM2087 Flow Restrictor that connects to the BC inflator hose or the GM3003 Quick-Ox Sampler that is simply held up to the valve outlet. This unit is CE approved. Features include: * BC flow meter and quick Ox checker * Two-year warranty * Typically lasts up to four years * Three-digit LCD display * Splash-resistant * Simple, reliable * Pocket-sized