Portable acidity meter

Abstract

The invention relates to a portable acidity meter. The portable acidity meter comprises a power supply, a single-chip microcomputer, an acidity sensor probe, a temperature sensor, a hardness sensor and a dissolved oxygen sensor, wherein the power supply is connected with the single-chip microcomputer, the output ends of the acidity sensor probe, the temperature sensor, the hardness sensor and thedissolved oxygen sensor are electrically connected with the input end of the single-chip microcomputer, the temperature sensor is a DS18B20 digital temperature sensor, and the single-chip microcomputer is an AT89C2051 single-chip microcomputer. The portable acidity meter further comprises an LED display circuit, a voice broadcast circuit, an information storage module and a printing module, wherein the output end of the single-chip microcomputer is electrically connected with the LED display circuit, the voice broadcast circuit, the information storage module and the printing module. The portable acidity meter is simple, scientific and reasonable in structure, convenient to use, and capable of measuring the acidity and alkalinity, temperature, hardness and dissolved oxygen in solutions.

Description

technical field [0001] The invention relates to an acidity meter, in particular to a portable acidity meter, which belongs to the technical field of acid-base measurement. Background technique [0002] Acidity meter is a commonly used instrument and equipment, which is mainly used to precisely measure the pH value of liquid medium. It can also measure the MV value of ion electrode potential with the corresponding ion selective electrode. The acidity meter is widely used in environmental protection, sewage treatment, scientific research , pharmaceutical, fermentation, chemical industry, aquaculture, tap water and other fields. The instrument is also an essential inspection equipment for QS and HACCP certification in food factories and drinking water factories. The characteristic of industrial acidity meter is that it requires good stability, reliable operation, certain measurement accuracy, strong environmental adaptability, strong anti-interference ability, and has analog m...

AI Technical Summary

Problems solved by technology

[0003] Most of the water hardness and acidity detection methods in my country use the titration method. A certain amount of acid is titrated to the measured solution to make the phenolphthalein indicator in the solution fade, and then the water hardness is calculated by using the formula. The disadvantage is that it needs to be established. The testing room needs to train professional testing personnel, the detection speed is slow, the precision is low, and the acidity of the tested solution is not accurate enough, which affects the detection of the staff

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