The Progress of Domestic PH Meter

Although the main purpose of often posting these articles is self-evident: to promote our own APURE brand pH meter. But in fact, even if we don't promote it, we should also realize that it is not necessarily bad to choose a domestic brand in ordinary applications. As long as there is no special requirement for accuracy, generally domestic products can meet the demand, and the price is almost only 1/2 of the imported product, and sometimes only 1/3 of the imported PH meter. In this case, unless it is a user who has identified a brand, it is usually recommended to use domestic products. There have been four generations of PH meter development, from the first generation of transistor circuits, to the first generation of integrated circuits, to the third generation of intelligent chip circuits, and now the fourth generation of multi-parameter serialized instruments. for many years. The first-generation electrochemical instrument: an electrochemical instrument that uses an electrometer tube as the input stage and uses a pointer meter to display the measured value. Generation: adopt operational amplifier and A/D conversion inheritance circuit. Typical product: PHS-3C from Leici Factory. The third generation: store some standard data in the chip, use software technology for automatic calibration, and have some intelligent functions of electrochemical instruments. The fourth generation: take multi-parameters as the design object, adopt the same design rules, hardware materials and operating modes, use different software programs, configure different sensors and accessories, and form a series of electrochemical instruments with single parameter, double parameter or multi parameter. As the domestic leader of PH meter, Lei Magnetic Factory is well-known at home and abroad, but their products are still mostly of the first and third generations, and the price of the fourth generation is relatively high. But although their prices are relatively high, they are relatively low compared to imported pH meters.