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.

Main 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 Resolution Accuracy Input current Input impedance Stability Temp Compensation range	(-1.99 ~ 19.99) pH 0.1/0.01 pH ±0.02 pH ≤1×10-12 A ≥1×1012 Ω ±0.01pH/3h (0 ~ 100)℃ (auto or manual)
mV	Measuring range(mV/ORP/EH) Resolution Accuracy	-1999.9mV ~ 0 ~ 1999.9mV 1mV ±0.1% FS
DO	Measuring range Resolution Accuracy Response time Residual current Temp compensation range Salinity compensation range Air pressure compensation Automatic calibration Electrode type	(0 ~ 20.00) mg/L(ppm)  (0 ~ 200.0)% 0.1/0.01 mg/L(ppm)    1/0.1% Electrode: ±0.10 mg/L, Instrument: ±0.40 mg/L ≤30 s (25℃, 90% response） ≤0.1 mg/L (0 ~ 100)℃ (automatic) (0 ~ 45) ppt (automatic) (80 ~ 105) kPa (automatic) Air saturated by water, water saturated by air Polarographic
Temperature	Measuring range Resolution Accuracy	-10℃~ 110℃ 0.1℃ 5~ 60℃: ±0.4℃  Others: ±0.8℃
Other Parameters	Data storage Storage contents     Power Communication connectors Dimensions & Weight	1000 groups Measurement series number, measuring value, temperature, ATC or MTC state, measuring date and time DC12V/1A Wireless Bluetooth, USB 240 × 170 × 70mm/600g
Working Conditions	Ambient temperature Ambient humidity IP grade	5 ~ 35 ℃ ≤85% IP54

Standard configuration

1. T721 pH/DO meter                                                        1 unit

2. Composite pH electrode                                                1 pc

3. DO electrode                                                                 1 pc

4. Rotary electrode holder                                                 1 pc

5. pH buffer (pH4.00, pH6.86, pH9.18/50ml）                   1 set

6. 12V power adapter                                                         1 pc

7. DO membrane cap                                                         3 pcs

8. DO electrode electrolyte (30ml)                                      1 bottle

9. Instruction manual in USB                                              1 copy