Operation and usage principle of fixed ozone detector with Hengaode instrument ozone detection transmitter

Mainly based on the working mechanism of its internal sensors, it detects ozone concentration and converts it into electrical signals for processing and output. The core principles include technologies such as ultraviolet absorption, semiconductor sensing, and electrochemical sensing, among which ultraviolet absorption and electrochemical sensing are widely used.‌

‌working principle‌

‌Principle of UV absorption‌Using ozone to treat specific wavelengths of ultraviolet radiation (such as253.7nmor254nm）The absorption characteristics are measured by measuring the degree of ultraviolet attenuation to calculate the concentration. The ultraviolet light source emits light, which is filtered by a light filter and only allows the target wavelength to pass through. After passing through the ozone absorption cell, the light is received by a photoelectric sensorLambert-BeerThe Law (Bill)-Lambert's law establishes a linear relationship between light intensity attenuation and concentration.‌

‌Principle of Electrochemical Sensing‌Detecting ozone through oxidation-reduction reactions on the working electrode. Electrochemical sensors consist of a working electrode, a counter electrode, and an electrolyte. Ozone diffuses into the sensor and reacts, producing a current signal proportional to the concentration. After circuit processing, the concentration value is output.‌

‌Principles of Semiconductor Sensing‌Using gas sensitive semiconductor materials (such asWO₃TheSnO₂）Ozone adsorption causes a change in material resistance, and the concentration can be calculated by measuring the resistance change, but this technology is less commonly used in transmitters.‌

‌Operation and usage process‌

‌Sampling and Testing‌The transmitter collects gas samples through a built-in suction pump or diffusion method, and the sensor detects ozone concentration in real time. Some models support pump suction sampling and are equipped with extended probe rods for easy detection at different heights or positions.‌‌Signal Processing and Output‌The detection signal is converted into a digital signal by the signal processing module, and the concentration value is calculated and displayed in real-time on the display screen, supporting multiple units (such as...)PPMThePPBThemg/m³）Switch. The output methods include4-20mATheRS485Relay alarm, etc., to achieve data transmission and remote monitoring.‌

‌Alarm and Calibration‌When the concentration reaches the preset threshold, it triggers an audible and visual alarm (such as a level four alarm) and displays a prompt message. Equipment usually has self calibration function to ensure long-term stability.‌

‌Key Features‌

‌Accuracy and reliability‌Using high-precision sensors (such as imported electrochemical sensors), the actual measurement accuracy can reach3%Internally, some models have passed the intrinsic safety explosion-proof design and are suitable for flammable and explosive environments.‌‌environmental adaptability‌Integrated temperature and humidity compensation functions, the shell is made of acid and alkali resistant, impact resistant materials, and supports wide range measurement (such as...)0-1PPMto0-100%VOL）Meet the needs of different scenarios such as laboratories, industrial workshops, and atmospheric monitoring.‌