1, correct the demand Correction method, length […]
1, correct the demand
Correction method, length of time, and ease. Ozone Detector Ozone (O3) is an allotrope of oxygen (O2), a light blue gas with a distinctive odor. The molecular structure is triangular, the bond angle is 116°, its density is 1.5 times that of oxygen, and its solubility in water is 10 times that of oxygen. Ozone is a strong oxidant. Its redox potential in water is 2.07V, second only to fluorine (2.5V). Its oxidation capacity is higher than chlorine (1.36V) and chlorine dioxide (1.5V), which can destroy decomposing bacteria. The cell wall quickly diffuses into the cell, oxidatively decomposes the glucose oxidase necessary for oxidizing glucose inside the bacteria, and can also directly interact with bacteria and viruses, destroy cells, ribonucleic acid (RNA), and decompose DNA. Macromolecular polymers such as DNA), RNA, proteins, lipids, and polysaccharides destroy the metabolism and reproduction of bacteria. The killing of bacteria by ozone is caused by the breakage of the cell membrane. This process is called cell dissipation. It is caused by the cytoplasm being pulverized in water. It is impossible for cells to regenerate under dissipated conditions. It should be noted that, unlike hypochlorite disinfectants, the bactericidal ability of ozone is not affected by pH changes and ammonia, and its bactericidal ability is 600-3000 times larger than that of chlorine. Its sterilization and disinfection are almost instantaneous. When the ozone concentration in water is 0.3-2 mg/L, the bacteria can be killed within 0.5-1 min. To achieve the same sterilization effect (such as killing E. coli 99%), the amount of ozone water required is only 0.0048% of chlorine. There are two ways to correct - the experiment room and on-site calibration. The field calibration is to exhale the oxygen sensor. The oxygen reading of the instrument must be descended and an alarm occurs.
The life of the gas detector is as long as possible. Generally speaking, the life of the sensor is at least 2 years, and the flammable gas sensor is 2 to 5 years. The longer the average error time, the better. Accuracy and precision (unit: g/cm3 or kg/m3), the smaller the deviation, the better. The product warranty period is generally 2 years.
Identification and evaluation of the hazard (wēi hài) gas in the limited space should be carried out by the company's professionals and on-site experienced (zuò yè) supervisors or employees to determine the selected test (check and test) Whether the sensor of the instrument meets the requirements of use. Gas detectors are classified according to the test object, and there are flammable gas (including methane) detection alarm device, toxic gas detection alarm device, and oxygen detection alarm device. According to the principle of detection, flammable gas detection includes catalytic combustion type, semiconductor type, thermal conductivity type and infrared absorption type; toxic gas detection has electrochemical type, semiconductor type, etc.; oxygen detection has electrochemical type. Classified by usage, portable and fixed. Classified according to the place of use, there are conventional and explosion-proof types. Classified by function, there are gas detectors, gas alarms and gas detection alarms. Classified by sampling method, there are diffusion type and pumping type. Portable gas detectors can be used to constantly detect the concentration of relevant gases in the petroleum and chemical industries to ensure the safety of workers! The simple and lightweight gas detector can continuously detect flammable, hydrogen sulfide, carbon monoxide, oxygen and other flammable gases in the surrounding environment. Its functional and waterproof design and rugged, impact-resistant housing make it suitable for use in any demanding environment.