CyberScan DO300 Product Features :: Waterproof and Dustproof Housing - IP67 rated, ideal for rugged harsh conditions. Plus it floats! :: Automatically Compensates Salinity and Barometric Pressure after manual input for increased accuracy :: Independent 100% and Zero Adjustment Calibrations give meter high accuracy across entire measurement range :: No Meter Warm-up Required with Galvanic Cell - takes measurements immediately and produces quick response :: Displays Electrode Diagnosis gives slope, zero offset and millivolt values to help determine when to service or replace electrode :: Stability Indicator prompts whenever reading stabilizes :: Hold Function momentarily freezes reading for easy viewing and recording :: Auto-Power Off saves battery power after non-use :: Self-Diagnostic with message codes for easy troubleshooting :: Adjustable Backlit Display for viewing readings conveniently in poorly lit places :: Large, Easy-to-Read Custom LCD Display with simultaneous readings provides optimum viewing with user-friendly icons :: Rugged Carrying Case (Included) provides handy on-site meter calibration and measurement Applications Aquacultural: Use to monitor oxygen levels in catfish and shrimp farming; game stocking ponds; ornamental fish tanks and ponds; and in other fish farming applications. Industrial: Ideal for checks the quality of plant water intake and discharge, wastewater and water treatment, recirculating systems and industrial process systems. Environmental: Use to test water quality, monitor health of aquatic ecosystems, survey surface and ground water drinking supplies, and meet EPA regulations. Educational: Ideal for quick, accurate DO readings in laboratories and schools. Specifications Product Specification Description Dissolved Oxygen Range 0 to 19.9 mg/l or ppm Resolution & Accuracy 0.01 mg/l, 0.1 ppm & ±1.5% Full Scale % Saturation of Oxygen 0.0 to 199.9 % Resolution & Accuracy 0.1 % & ±1.5% Full Scale Temperature Range 0.0 to 100.0 °C (32.0 to 212 °F) Resolution & Accuracy 0.1 °C (0.1 °F) & ± 0.3 °C (0.5 °F) Salinity Correction 0.0 to 50.0 ppt Barometric Pressure Correction 500 to 1499 mm Hg or 66.6 to 199.9 kPA Method Manual input for automatic correction No. of DO Calibration Points Up to 2 points; 100% in air and/ or 0% in known solution Temperature Compensation Automatic / Manual (0 to 100 °C) Back-lit Display Yes Memory 50 data sets Special Functions Stability Indicator; Self-diagnostic; Electrode characteristics; Hold & Auto-Power Off after20 minutes Power 4 'AAA' x 1.4V batteries Dissolved Oxygen DO Meter DO300 Eutech Water Quality Meter à¤Ã×èͧÇÑ´ DO à¤Ã×èͧÇÑ´¤Ø³ÀÒ¾¹éÓ à¤Ã×èͧÇÑ´»ÃÔÁÒ³ÍÍ¡«Ôਹ㹹éÓ