Affected by strong cold air, it is expected that from the night of the 31st to the 1st of April, there will be rain, snow and windy weather in Hebei Province from north to south. There are light snow or sporadic snow (1~3 mm) in the Bashang area, and light rain (3~8 mm) in other areas, including small to moderate rain in the western areas of Baoding, Shijiazhuang, Xingtai and Handan (7-15 mm). ). The minimum temperature in all regions will generally fall by 6-8 °C, and the local temperature will drop by 8-10 °C. On the morning of April 2, the minimum temperature in the central and southern regions will drop to -1 to 3 °C. Most parts of the province have northerly winds from north to south with 4 to 6 northerly winds; the central and western coasts of the Bohai Sea have northeast winds of 7-8 and gusts of 9th. Dissolved oxygen analyzer is mainly used to detect the oxygen content in solutions. It consists of a Dissolved Oxygen Controller and a Dissolved Oxygen Sensor. Real time feedback of data to the controller through sensor measurement. Daruifuno's DUC2-DO dissolved oxygen analyzer is equipped with an optical dissolved oxygen sensor. The fluorescence method does not consume oxygen, does not require electrolyte, has a fast response and is convenient for measurement. Dissolved Oxygen Analyzer Suzhou Delfino Environmental Technology Co., Ltd. , https://www.daruifuno.com
At present, the winter wheat in the middle and north wheat areas of Hebei Province is in the greening period, and the south enters the rising stage. Because the cooling process lasted for a short period of time and the temperature was fast, it had little effect on the rejuvenation of winter wheat. The precipitation was beneficial to the growth of winter wheat.
It is recommended that all localities should guard against the adverse effects of heavy winds and rain and snow on traffic and other aspects. Coastal areas should do good wind defense work; the temperature rises and falls before and after the arrival of cold air, residents should pay attention to prevent colds. The Ching Ming Festival is coming soon. The number of people who use the fire and the tourist to go to the graves is increased. It is necessary to strengthen the management of fire in the wild and do a good job in forest fire prevention.
Dissolved oxygen refers to oxygen molecules dissolved in water. It is one of the gases necessary for the survival and breathing of organisms in water bodies. The concentration of dissolved oxygen in water can affect the growth and health of aquatic organisms. The online dissolved oxygen analyzer can realize real-time continuous monitoring of the dissolved oxygen value of water quality.
The measurement principles of dissolved oxygen analyzers usually have the following types:
Polarography: An electrode is immersed in water to measure the dissolved oxygen content based on a change in current or potential generated by a redox reaction between the dissolved oxygen and the electrode.
Optical method: This method uses an optical dissolved oxygen sensor to measure the dissolved oxygen concentration. One common optical sensor is the oxygen sensor, which uses an oxygen-sensitive dye to detect the amount of dissolved oxygen in water. These sensors can measure using principles such as fluorescence or absorption spectroscopy.
Chemical methods: Chemical methods typically use reagents to measure dissolved oxygen levels. These reagents chemically react with dissolved oxygen to produce a measurable color change or electrical signal, allowing the concentration of dissolved oxygen to be determined.
The cold air brings precipitation, which is beneficial to Hebei winter wheat to grow up and grow up.
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