AZ Instrument DO Meter with Memory MSE Supplies is an authorized distributor of AZ Instrument Corp. Applications: The portable 8403 AZ DO meter can measure the value of Dissolved Oxygen with unit of % or ppm or mg/l in liquid, which had been widely operation in the Water Quality Testing applications. It has the big LCD which can display the D.O. (Dissolved Oxygen) value and the temperature. The 8403 AZ Digital DO Device could be the best Water Quality tester for all professional measuring purposes, including the LAB, water treatment business, Aquaculture, Aqua farm, swimming pool or other related industry. Specifications: Model 8403 DO Measuring Range 0~199.9 (in %) DO Accuracy ±1.5% F.S (in %) DO Resolution 0.1% (in %) DO Measuring Range 0~19.99 (in ppm or mg/l) DO Accuracy ±1.5% F.S (in ppm or mg/l) DO Resolution 0.01 (in ppm or mg/l) Temperature Measuring Range 0~50.0℃ Temperature Accuracy ±0.3℃ Temperature Resolution 0.1℃ Manual Compensation Included Salinity Adjustable Range 0.0~50.0 ppt Salinity Resolution 0.1 ppt Barometric Pressure Adjustable Range 500~1499 mmHg/66.6~199.9 Kpa Barometric Pressure Resolution 1 mmHg/0.1 Kpa Coefficient of membrane Adjustable Memory 99 Points IrDA Port Included Real Time/Recall Included LCD Size 44(L)*26 (W) mm Operating Temperature 0~50℃ Operating RH% Humidity <80% Storage Temperature 0~60℃ Storage RH% Humidity <90% Sensor Life Time >6 months (with good maintenance) Meter Size 175(L) * 70(W) * 33(H) mm Weight ~150g Battery AAA *4 PCS Standard Package Meter, Batteries, Dissolve Oxygen (D.O.) Probe (840PAZ),Manual, Carry Case, Electrolyte, Syringe, Membrane, O-ring Optional Accessory USB Cable & Software