DOS-1703 Portable Dissolved Oxygen Meter DOS-1703 portable dissolved oxygen meter is outstanding for ultra-low power microcontroller measurement and control, low power consumption, high reliability, intelligent measurement, using polarographic measurements, without changing the oxygen membrane. Having reliable, easy (one-hand operation) operation, etc.; the instrument can display dissolved oxygen concentration in two kinds of measurement results indicates, mg / L (ppm) and the oxygen saturation percentage (% ), in addition, measure the temperature of the measured medium simultaneously. Technical indexes Measuring range DO 0.00--50.0mg/L 0.0--500% Temp 0 60 ATC/MTC Atmosphere 300--1100hPa Resolution DO 0.01mg/L,0.1mg/L(ATC 0.1%/1%(ATC Temp 0.1 Atmosphere 1hPa Electronic unit measurement error DO ±0.5 % FS Temp ±0.2 Atmosphere ±5hPa Calibration At most 2 point, (water vapor saturated air/zero oxygen solution) Power supply DC6V/20mA; 4 x AA/LR6 1.5 V or NiMH 1.2 V and chargable Size/Weight 230 100 35(mm)/0.4kg Display LCD Sensor input connector BNC Data storage Calibration data99 groups measurement data Working condition Temp 5...40 Relative humidity 5%...80% (without condensate) Installation grade â?¡ Pollution grade 2 Altitude