Before selecting a water quality testing instrument, the following two points should be clarified:
► First of all, we must clarify our own needs, that is, what parameters do we want to measure, single parameter or multiple parameters, and what specific parameters are there;
► Secondly, you need to know the environment in which the instrument is used. If it is used in the laboratory, it is recommended to use a desktop water quality analyzer. If it is used in the field or for multiple monitoring points, it is recommended to use a portable water quality analyzer.
The following is a comparison table of the differences between different water quality testing instruments in Tongao
 |  |
| 6900 series | Portable 900 Series |
| 6900 series products are laboratory desktop instruments with built-in thermal printers. The instrument integrates the advantages and disadvantages of previous instruments to maximize strengths and circumvent weaknesses, making detection more accurate; the overall design of the instrument is simple and elegant, easy to operate and intuitive, and detection is more stable. It is suitable for the detection data requirements. taller users. | Portable 900 series, the overall box-type configuration, easy to carry, new light source structure design, high scalability, the host comes with a rechargeable power supply, the digestion instrument has three power supply modes: 220V, vehicle or mobile power supply, suitable for on-site detection or multiple Passed between monitoring points. |
 |  |
| Desktop TR series | Economy TRS Series |
| TR series products, Tongao Technology’s classic instruments, metal casing, built-in thermal printer, with data storage, data printing and other functions, cost-effective, suitable for daily sewage testing of enterprises. | TRS series products, Tongao Technology's economical series instruments, ABS shell, suitable for simple daily testing of enterprises. |
 | |
| Touch screen 8100 series | |
| 8100 series products, touch screen series products, the overall full touch design, simple and intuitive operation, can expand dozens of detection parameters, intelligent operation program, guide users to easily complete the operation. | |
