T-721 Precise pH-DO Meter
Precise measurements of pH/DO in fields of biotechnology, aquaculture, power plant and environmental protection, and also more widely used in areas of education and scientific research.

Features:
●7 inch color capacitive screen with high resolution (1024*600) and sensitivity, which can show more parameters, more intuitive and simpler to read data.
●Auto calibration, auto temperature compensation, data storage, USB data export, clock, wireless printing, function setup, smart self-diagnosis and other intelligent functions.
●English and Chinese operating system, humanized design with adjustable screen brightness.
●Auto recognition of standard pH buffer solutions and there are three kinds of standard buffers for option: USA series, NIST series and China series.
●Built-in big memory can store 1000 sets of test data which can be saved and transferred to USB and opened with Excel, very easy and convenient for edit.
●DO mode has functions of ATC, auto salinity compensation and auto pressure compensation.
●New structure polarographic DO electrode can measure temperature, salinity and dissolved oxygen simultaneously, equipped with special DO electrode calibration sleeve, only need 3~5 min for polarization.
●Combined diaphragm cap makes it extremely convenient to replace the sensitive membrane just by screwing the new cap to the electrode.
●DO measurement is polarographic and suggested to be used with our magnetic stirrer or other appropriate models chosen by customers.
●With standard Bluetooth module and support wireless Bluetooth printing to make operations much easier for users. Optional data transmission to PC and cell phone via Bluetooth.
●IP54 dustproof and waterproof housing.
Specifications:
pH :Measuring range :(-1.99 ~ 19.99) pH
Resolution :0.1/0.01 pH
Accuracy :±0.02 pH
Input current :≤1×10-12 A
Input impedance :≥1×1012 Ω
Stability :±0.01pH/3h
Temp Compensation range :(0 ~ 100)℃ (auto or manual)
mV :Measuring range(mV/ORP/EH) :-1999.9mV ~ 0 ~ 1999.9mV
Resolution :1mV
Accuracy :±0.1% FS
DO :Measuring range :(0 ~ 20.00) mg/L(ppm) (0 ~ 200.0)%
Resolution : 0.1/0.01 mg/L(ppm) 1/0.1%
Accuracy :Electrode: ±0.10 mg/L
Instrument: ±0.40 mg/L
Response time :≤30 s (25℃, 90% response)
Residual current :≤0.1 mg/L
Temp compensation range :(0 ~ 100)℃ (automatic)
Salinity compensation range :(0 ~ 45) ppt (automatic)
Air pressure compensation :(80 ~ 105) kPa (automatic)
Automatic calibration :Air saturated by water, water saturated by air
Electrode type :Polarographic
Temperature :Measuring range :-10℃~ 110℃
Resolution :0.1℃
Accuracy :5~ 60℃: ±0.4℃ Others: ±0.8℃
Other Parameters :Data storage :1000 groups
Storage contents :Measurement series number, measuring value, temperature, ATC or MTC state, measuring date and time
Power :DC12V/1A
Communication connectors :Wireless Bluetooth, USB
Dimensions & Weight :240 × 170 × 70mm/600g
Working Conditions :Ambient temperature :5 ~ 35 ℃
Ambient humidity :≤85%
IP grade :IP54