The SensoRex DO6400-T is a dissolved oxygen sensor that measures dissolved oxygen in water. It has a measurement range of 0-20 mg/L (ppm) O2 with an accuracy of ±1% of reading. The sensor uses optical fluorescence quenching technology with a rugged titanium body and IP68 waterproof rating. It has an operating temperature range of 0-50°C, response time of <60 seconds, and expected lifetime of >5 years. The sensor has a standard 4-20 mA output and is designed for long-term monitoring and recording of dissolved oxygen in natural waters, wastewater, aquaculture, and industrial processes. It requires no membranes or electrolyte replacement.