Product application: Analyze the content of dissolved oxygen in pure water Features:-Waterproof, particularly strong, lightweight O2 or dissolved oxygen analyzer-Works with Orbisphere's patented electrochemical probe-No warm-up required for accurate measurements-High sensitivity The 3655 can detect as low as 0.1 ppb-sturdy IP67 / NEMA4 stainless steel construction is durable and durable-responsive, usually from the saturation concentration to 2ppb range, only 3 minutes -Low maintenance, usually every 6 months -Data storage function, downloadable analysis