Designed with precision FQ optical technology coupled with intelligent microprocessor-based electronics, the self-monitoring DO8 stores calibration data within the sensor, which minimizes maintenance over long service intervals while providing stable, dependable DO measurement. The Triton DO8 Sensor features a maximum error rate of less than 2 percent, repeatability of ±0.5 percent and resolution of 0.01ppm or 0.01 percent saturation. It operates over a wide measurement range with three different outputs from 0 to 20 mg/l (0-20ppm), 0-200 percent saturation or 0-500hPa (0-6 psi).Electro-Chemical Devices Inc. www.ecdi.com800.729.1333