Portable Digital Pen Type Dissolved Oxygen Meter Waterproof

Portable Digital Pen Type Dissolved Oxygen Meter Waterproof Water Quality Tester Detector Accurate Reliable Ideal Backlit LCD Screen for Household Drinking Water Swimming Pools Hydroponics Specification: Condition: 100% Brand NewItem Type: Dissolved Oxygen MeterMaterial: PlasticMeasuring Range:Dissolved Oxygen: 0.0- 20.0mg/LTemperature: 0~40°CBasic Error:Dissolved Oxygen: ±0.3mg/LTemperature: ±1°CResidual Current: ≤ 0.15mg/LResponse Time: ≤30s (90% response at 20°C)Automatic Temperature Compensation Range: 0~40°CPower: 4 x AAA...