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  • pH automatic control liquid addition system
    pH automatic control liquid addition system
    SC-200A Max pH Automatic Control Liquid Addition System
    This instrument is a new type of automated control system that integrates pH value online display, measurement, and automatic adjustment of acid/alkali solution. Widely used in places where pH value
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      This instrument is a new type of automated control system that integrates pH value online display, measurement, and automatic adjustment of acid/alkali solution. Widely used in places where pH value needs to be controlled and adjusted, such as laboratory researchers monitoring and controlling the acidity and alkalinity of solutions in various reaction vessels, reaction tanks, biochemical containers, catalytic fields, and bioreactors.

      This system is the latest third-generation high-precision pH automatic control system developed by the R&D team of Changsha Sichen Instrument. It is carefully designed and manufactured for universities, research institutes, laboratories, domestic and foreign R&D enterprises, and R&D production departments, and has completely independent intellectual property rights. Obtained one national invention patent (ZL201410349779.8) and multiple utility model patents (ZL201721373766.X); ZL 201420406067.0; ZL201420406055.8. The whole machine adopts PLC control and is connected with a customized peristaltic pump to automatically adjust the preset pH value of the solution in the container by adding acid or alkali. It is an ideal pH monitoring and automatic control system for laboratories such as catalysis, pharmaceuticals, chemical engineering, electroplating, biochemistry, biological fermentation, plant extract workshops, scientific institutes, or small production test sites


    1. Working power supply: AC220V ± 10% 50Hz

    2. Control mode: PLC

    3. Control range: 0-14pH

    3. Measurement accuracy: ± 0.05pH

    4. Resolution: 0.01pH

    5. Pump head speed: 0.1-300rpm

    6. Display: 10 inch touch screen

    7. Liquid addition speed: 13 # tube 0.10-10.2ml/min (standard)

    16 # tube 1.97-33.98ml/min (standard)

    25 # tube 3.26-190ml/min (optional)

    8. Temperature compensation: automatic temperature compensation (optional)

    9. PH control: freely adjustable

    10. PH electrode suitable temperature: 0-80 ℃ (optional high temperature up to 135 ℃)

    11. PH standard buffer powder: 4.00/6.86/9.18

    12. Dimensions: 535 * 355 * 255mm

    13. Environmental temperature: Room temperature~45 ℃

    14. Relative humidity:<80%

    15. Whole machine weight: approximately 9.6kg


    1. PH detection, display, and automatic liquid addition adjustment are integrated, which can adjust the pH of the solution through static or online monitoring.

    2. It can control the addition of test solution based on pH value, and the peristaltic pump can operate independently for other experiments.

    3. Touch integrated 10 inch display screen, Chinese operation interface, displaying both control settings and measured values simultaneously.

    4. Using PLC control to accurately control the speed of the liquid pump and adjust the liquid addition speed in real-time.

    5. Multiple control modes: dual pump independent mode, unidirectional liquid addition mode, bidirectional liquid addition mode can be switched at any time according to needs.

    6. Low impedance high-precision customized pH composite electrode with fast response, suitable for pH monitoring under various working conditions.

    7. The stepper motor controls the peristaltic pump to add liquid, with good controllability. The fluid only contacts the pump tube, not the pump body, and is pollution-free.

    8. The sealed pipeline connection is composed of acid and alkali resistant liquid addition pipes and imported pump pipes, with a long service life.

    9. The pH measurement and control accuracy is high, and the flow rate can be automatically adjusted. Users can set the appropriate flow rate according to the usage process.

    10. It can avoid the physical harm caused by organic solvents to experimental personnel when adjusting the solution, and also improve work efficiency.

    11. Adopting dual pump heads, it can simultaneously control the pH one-way adjustment of two samples.

    12. Real time pH monitoring data and change curves can be viewed, and historical data can be exported with a USB interface.

    13. Real time display of the flow rate, current temperature, and simulation animation of the pumped neutralizing liquid can be achieved by switching between different modes.


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