Waterproof DO Meter, DO 300 Cyberscan, Ex. SingaporeWaterproof and DustproofDO Range : 0.00 to 19.99 mg/L or ppm, 0.01 mg/L or ppmTemperature range : 0.01 to 50.0 °C, 0.1 °C% saturation of Oxygen Range : 0.0 to 199.9 %Memory 50 data setsGalvanic dissolved oxygen probe, 3 meter

DO Meter, DO 110 Cyberscan, Ex. SingaporeDO Range : 0.00 to 19.99 mg/l(ppm), 0.01 mg/L or ppmTemperature range : 0.01 to 50.0 °C, 0.1 °C% saturation of Oxygen Range : 0.0 to 199.9 %Memory 100 data setsGalvanic dissolved oxygen probe, 3 meterRS232C Output

DO Meter, DO6+ EcoScan, Ex. SingaporeDO range : 0.00 to 19.99 mg/L or ppm, 0.01 mg/l or ppmTemperature range : 0.01 to 50.0 °C, 0.1 °C% saturation of Oxygen : 0.0 to 199.9 %

DO Meter Lutron 5510, Ex. TaiwanMeasuring :Dissolved Oxyen Range : 0 to 20.0 mg/L, 0.1 mg/LOxygen in Air Range : 0 to 100.0%, 0.1% O2Temperature Range : 0 to 50 °C, 0.1 °C

DO Meter Lutron 5509, Ex. TaiwanDO Range : 0 to 20.0 mg/LResolution : 0.1 mg/LAccuracy : 0.4 mg/L