Analysis of Quality Judgment for Industrial Online pH Meters
1. Accuracy: the industrial online PH meter without accuracy has no use value. The way to judge the stability of the online PH meter is to use a high-precision instrument. The same industrial online PH meter can be placed in a stable solution for a long time to see whether the value changes and the extent of change; On the other hand, the stability of multiple industrial online pH meters requires placing several calibrated industrial pH meters of the same model in the same stable solution to see if the readings are consistent and what is the error. If stability cannot be guaranteed between several industrial online pH meters of the same model, it is difficult to ensure the accuracy and stability of each instrument's industrial pH meter.
3. Common error adjustment: Temperature is the most obvious factor causing pH error. The presence or absence of temperature probes and the sensitivity of temperature probes also affect the use of industrial online pH meters.
4. Convenient operation and beautiful interface: Users are relatively easy to judge in this regard. Some old-fashioned industrial online pH meters use analog switches, which makes calibration difficult, small changes are difficult to detect, and are prone to fatal system errors. On the other hand, considering the cost and technology, many instruments use LED Nixie tube, and the display content is not rich enough. Of course, some manufacturers make up for this shortcoming through certain ways. At present, the commonly used user-friendly interfaces are LCD liquid crystal display keyboard type humidity sensor probes, stainless steel electric heating tubes, PT100 sensors, fluid solenoid valves, cast aluminum heaters, and heating coils.
5. Advantages and disadvantages of pH electrodes: There is no doubt that the performance of electrodes directly affects some technical indicators of industrial online pH meters, and even superior industrial online pH meters equipped with inferior electrodes are useless.
6. Safety: In recent years, more and more customers have begun to pay attention to operational safety, and well-designed industrial online pH meters using lower safety voltage inputs can greatly improve safety performance.
