How to choose a good ozone detector? first of all, Different uses require different types of ozone detectors.
1.the detection objects are different.
(1). The detection objects of ozone detectors are mainly divided into these scenarios:
Used for air quality monitoring, laboratory research, water treatment and disinfection or indoor air quality detection. Different scenarios have different requirements for the accuracy, range and protection level of ozone detectors.
The detection object may be ozone gas in air or O3 in water. Generally, ozone gas is detected at ppm and ppb levels. The ppb level is mostly used to detect ambient air quality. PPM is used for industrial grades.
(2). Different ozone detectors use different sensor.
Electrochemical ozone sensor: The cost is relatively low, the range covers the ppm range, but there is a cross reaction to the gas, the life is generally 1-2 years, and regular calibration is required. It is greatly affected by temperature and humidity. You can choose some big brand ozone sensors, such as CITY Technology, ALPHASENSE, Membrapor.
Ultraviolet absorption ozone sensor: It uses a 254nm wavelength ultraviolet light source, which is a unique characteristic absorption peak of ozone. It has high accuracy, is not affected by cross-reaction, and has a stable detection life of more than 5 years. It is the first choice for some high-end ozone detector. It can detect ppm ppb levels. But the cost is very high.
Semiconductor ozone sensor: The lowest cost, poor accuracy, unstable, generally not recommended.
2.The accuracy of an ozone detector can be determined from the following aspects:
(1).Accuracy: Usually better within ±5%FS, UV is much better than EC electrochemical accuracy.
(2).Resolution: 0.01ppm accuracy is much better than 1ppm
(3).Cross interference: It measures the response of the instrument to other non-target gases
(4)Service life: Electrochemical sensors are generally 1-2 years, and UV sensors have a longer life.
In addition, to choose a good ozone detector, you also need to see whether it meets national standards, such as safety certification and performance certification. The waterproof and dustproof level of the instrument, and the user's needs for functions, such as alarm function, data transmission and recording function, etc.
However, after choosing a good quality ozone detector, a key step is to calibrate the ozone detector regularly, that is, to compare and adjust the standard gas of known concentration with the instrument reading. Because the sensor is affected by the environment, it is generally recommended to calibrate it once every six months. You can find a professional laboratory or professional organization for calibration. The quality of the standard gas determines the accuracy of the calibration.
Our company Xi'an Huafan Technology Co., Ltd. Produce ozone gas detectors which are used for industry. It uses electrochemical sensors with a range of 0-5ppm, 0-10ppm, 0-50ppm or 0-100ppm. There are portable gas detectors and fixed gas detectors, which can meet the real-time data transmission function. The ozone leak detector is calibrated by the Institute of Metrology, with quality, safety and reliability. Welcome to consult.