T-730 pH/mV/Conductivity/DO Meter

Multi-parameter analyzer for high precision measurement in laboratory covering 10 kinds of electrochemical parameters like pH, conductivity and dissolved oxygen. Suitable for the fields of petroleum, chemical, pharmacy, power plants and environmental protection, and also widely used in areas of education and scientific research.

Main Features:

●7 inch colored capacitive screen with high resolution (1024*600) and sensitivity, which can show more parameters, more intuitive and simpler to read data.

● Meet GLP norms, with 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.

●Built-in big memory can store 1000 sets of test data which can be saved and transferred to USB flash drive 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.

●Auto recognition of 8 kinds of standard conductivity solutions and there are two series of standard solutions for option: Europe & USA series and China series.

●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.

●Able to switch between conductivity, TDS, salinity and resistivity. Multinomial calculation for TDS and salinity to ensure the conversion precision of the full scale.

●Auto recognition of standard pH buffers. And there are three series of buffer solutions for option: Europe & USA series, NIST series, CHINA series.

●With standard Bluetooth block and support wireless Bluetooth printing to make operations much easier for users. Optional data transmission to PC and cell phone via wireless Bluetooth.

●IP54 dustproof and waterproof housing.

●DO measurement is polarographic and suggested to be used with our magnetic stirrer 600 or other appropriate models chosen by customers.



Measuring range



Input current

Input impedance


Temp compensation

(-1.99 ~ 19.99) pH

0.1/0.01 pH

Electrode: ±0.002 pH, Instrument: ±0.01 pH

≤1×10-12 A

≥1×1012 Ω

±0.02 pH/3h

(0 ~ 100)℃(auto or manual )


Measuring range(mV/ORP/EH) Resolution


-1999.9mV ~ 0 ~ 1999.9mV


±0.03% FS




Measuring range









Temp compensation

Electrode constants

Reference temperature


(0.00~20.00) μS/cm   (20.0~200.0) μS/cm

(200~2000)μS/cm    (2.00~20.00) mS/cm

(20.0~200.0)mS/cm  (200~2000) mS/cm (K=10)

Resistivity:(0 ~ 100) MΩ·cm

TDS: (0 ~ 100) g/L

Salinity: (0 ~ 100) ppt

0.01/0.1/1μS/cm  0.01/0.1/1 mS/cm

Electrode: ±0.5% FS, Instruments: ±0.80%FS

(0 ~ 50)℃ (automatic)

0.1/0.5/1/5/10/50/100 cm-1

25℃, 20℃,18℃

Dissolved Oxygen


Measuring range



Response time

Residual current

Temp compensation

Salinity compensation

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

≤30s (25℃, 90%response)

≤0.1 mg/L

(0 ~ 45)℃ (automatic)

(0 ~ 45) ppt (automatic)

(80 ~ 105) kPa (automatic)

Air saturated by water; water saturated by air




Measuring range



-10℃~ 110℃


5~ 60℃: ±0.4℃  Others: ±0.8℃

Other Technical Parameters

Data storage

Storage contents


Power requirements


Dimensions & Weight


Measuring value series number, measuring value, temperature, ATC or MTC state, measuring date and time.


USB, Wireless Bluetooth

240 × 170 × 70mm/600g

Working Conditions


Ambient temperature

Ambient humidity

IP grade

5 ~ 35℃



Standard Configurations

1. T-730 pH/mV/ISE/Conductivity/DO meter                                          1 unit

2. Rotary electrode holder                                                                          1 pc

3.201T-M plastic pH/ATC three-in-one composite electrode               1 pc

4. 2503-C glass pH composite electrode                                                1 pc

5. MP500 temperature electrode                                                              1 pc

6. 2401-M conductivity electrode                                                             1 pc

7. DO500 DO electrode                                                                               1 pc

8. Standard pH buffer solutions(pH4.00, pH6.86, pH9.18/50ml)     1 bottle/each

9. 1408μS/cm standard conductivity solution (50ml)                          2 bottles  

10.12V power adapter (for instrument)                                                   1 pc

11. DO503 membrane cap (for DO electrode)                                        3 pcs

12. DO502 DO electrode inner solution (30ml)                                      1 bottle

13. Cathode polishing paper                                                                     2 pcs

14. Instruction manual                                                                              1 unit