Electrochemical trace oxygen analyzer for effectively prolonging usage life of sensor

Abstract

The invention relates to the field of gas analysis, and is an electrochemical trace oxygen analyzer for effectively prolonging usage life of sensor. The invention comprises a gas path system, a sensor system, a control system, a power supply system and a display system; the gas path system is connected with the sensor system; the control system is respectively connected with the gas path system, the sensor system, the power supply system and the display system; the sensor system comprises a sensor and a test chamber with sensor accommodation space; an air inlet and a gas outlet of the test chamber are connected with the sensor; the air inlet and the air outlet also provided with solenoid valves, and the solenoid valve is connected with the control system. The electrochemical trace oxygen analyzer provided by the invention can effectively prolong usage life of the sensor, and damaged or old sensors can be replaced conveniently, and the service life of the analyzer is improved; gas pressure in the air path of the oxygen analyzer can be balanced, thereby substantially improving usage life of the sensor.

Description

technical field [0001] The invention relates to the field of gas analysis, in particular to an electrochemical trace oxygen analyzer which effectively prolongs the service life of a sensor. Background technique [0002] Trace oxygen analyzers are usually used in working environments that have special requirements for oxygen content, and the corresponding electrochemical sensor for detecting oxygen content is one of the important components of the trace oxygen analyzer. [0003] The electrochemical sensor is the core component of the electrochemical trace oxygen analyzer. When the measured gas enters the test chamber, the oxygen in the gas reacts with the substance inside the sensor, and outputs a continuous current signal according to the oxygen concentration of the gas, which is controlled by the circuit The board collects and processes the output current of the sensor and then transmits it to the microcontroller. The microcontroller calculates the signal and issues corresp...

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Problems solved by technology

[0004] However, the prior art lacks a device or method for protecting the electrochemical sensor, so that the electrochemical sensor is often exposed to an environment with a high oxygen concentration, which affects its test accuracy and shortens its service life;

[0005] It often happens that the gas pressure is too large (positive pressure) or too small (negative pressure) to cause damage to the electrochemical sensor. Because the sensor is expensive, it has caused great economic losses to the user; at the same time, the electrochemical sensor contains toxic substances and is damaged. If the sensor is not handled properly, it will cause a certain degree of damage to the environment;

[0006] If the sensor is damaged, it is very troublesome to replace the sensor in the prior art, and even professional engineers are required to do it. The maintenance period is long and the cost is high, which brings a lot of inconvenience to the user's production measurement;

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