Apera Instruments, AI469, SX751 8-in-1 Portable pH/DO/ORP/Conductivity/TDS/Salinity/Resistivity/Temperature Meter KitApera SX751 is designed for lab-grade measurement of up to 8 water quality parameters in the field, including pH, ORP (redox), DO (dissolved oxygen), conductivity, TDS, salinity, and resistivity.Basic FeaturesIntelligent functions - auto calibration, auto temperature compensation, self-diagnosis, data logging, auto power off, and more.Digital filter technology - enhance the meter's response time and measurement accuracyAutomatic electrode recognition - the meter automatically switches to the right parameter mode according to the connected electrodeData logging - 400 sets of data storage and recallBuilt tough - IP57 water-resistant structure, ideal for use in harsh environmentpH Electrode Features:Fast response and high accuracySuitable for general water solutions' pH testingMeasurement Range: 0 to 14 pH, 0 to 80°C (32 to 176°F)Junction: Single ceramicCable length: 1 meterTemperature sensor: 30K ThermistorConductivity Electrode Features:Measurement Range: 0 to 200 mS/cm ( 0 to 200,000 µS/cm), 32 to 122°F (0 to 50°C)Housing: POMCable length: 1 meterConnector: 8-pinTemperature sensor: 30KΩ thermistorDO Electrode Features:Enables automatic compensation for temperature and salinity, minimizing, DO measurement errorElectrode polarization takes only 5 minutesMeasurement Range: 0-20.00mg/LCable length: 2 metersTemperature unit: 30KΩ ThermistorORP Electrode Features:Platinum ring ORP sensor for fast and stable readingsMeasurement Range: -1999 to 1999 mVJunction: Single CeramicReference Electrode: Ag/AgClCable length: 1 meterApplications:Environmental monitoringAquaculturePools and spasLaboratoryBeverage makingWater treatmentComes as a complete test kit in a rugged carrying case for convenient field test.