Water level sensor is an instrument that can automatically determine and record the water level of water bodies such as rivers, lakes and irrigation canals. In practical application, according to the different scale and form of project works, different development needs, different application location, the choice of water level meter is different. With the development of society, the progress of the times, the quality of the project excellence, the accuracy of the signal acquisition to improve the practical performance of the product enhancement, less investment, occupies a small area, the construction of a convenient water level meter, will be more and more water conservancy projects to choose.

1.Bubble Water Level Sensor
A tube with air capacity at the upper end is inserted into the water, and a small amount of air is passed into the tube with a constant flow, and the current water level can be converted by measuring the air pressure inside the tube. Bubble type water level gauge only a gas tube into the water, test and then pressurized, usually in the no-pressure or micro-pressure state, so the drift is very small, do not need to be timed rate fixing.

Scope of Application and Characteristics:
(1) High measurement accuracy (millimeter level), large range (up to 70m or more), maintenance-free, vibration-resistant, long life;
(2) With simple installation, flexible operation and networking, the instrument only needs to put the gas guide tube and gas capacity into the water, without building a logging well, saving investment in civil construction;
(3) Especially suitable for flowing water, large and small rivers, reservoirs, or water pollution and corrosive industrial wastewater and other occasions;
(4) Equipment and the body of water to be measured completely without "electrical" connection, only a gas pipe into the water, thus avoiding a lot of interference, influence, constitute its own use of characteristics, data stability and reliability.

2. Radar Water Level Sensor
Radar water level meter uses radar waves to measure the distance to the water surface, which is actually a radar rangefinder. Radar wave measurement is not affected by temperature, humidity, wind speed, rainfall and other environmental factors. The radar water level meter measures the water level in a non-contact way, which is also not affected by the water body, and the accuracy reaches the first grade accuracy.

Scope of Application and Characteristics:
(1) High measurement accuracy (millimeter level) and large range (up to 70m or more);
(2) Only need to place the probe above the water surface, can not build a logging well, saving investment in civil construction;
(3) Non-contact measurement, not polluted by the water body, does not damage the water flow structure;
(4) Not affected by tempe...

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Hydrogen Sulphide Generation Sites:

1）Chemical Industry
The production and manufacture of sulphur-containing compounds such as parathion, ethion, phosmet, sulfanilamide, etc.; petrochemicals, coal chemical industry, natural gas chemical industry, rubber vulcanisation process, etc. can produce hydrogen sulphide.

2）Oil Extraction
In the process of drilling and extracting oil, a large amount of hydrogen sulphide can be spewed out due to impurity sulphur in the oil.

3）Tanning, Monosodium Glutamate
Tanning leather with sodium sulfide hair removal, the production of monosodium glutamate with sodium sulfide in addition to iron, can produce hydrogen sulfide.

(4) Paper, Sugar, Food Processing Industry
With plants and animals as raw materials for some of the production process, due to the fermentation and corruption of organic matter can produce hydrogen sulfide.

(5) Mining, Smelting Industry
All kinds of ores contain impurity sulfur, mining and smelting process can have a large amount of hydrogen sulfide; purification of certain metals with hydrogen sulfide, the generation of its insoluble sulfide, there is also hydrogen sulfide.

6) Fishing Industry
Fish in the cabin can produce hydrogen sulfide after corruption, poor ventilation can easily lead to poisoning.

(7) Sewage Pipe and Well Operation
Cleaning of pickling pols, sewers, sewage drains, septic tanks, rubbish piles can often be exposed to high concentrations of hydrogen sulphide.

8）Chemical Cleaning Operations
Cleaning operations using sulfur-containing cleaning agents, devices, containers, pipelines, heat exchangers, etc., the material and scale containing sulfur and sulfur compounds, under certain conditions will produce hydrogen sulfide gas.

Hydrogen sulphide is produced from the decomposition of proteins and some chemical reactions. It is a weakly acidic, water-soluble substance that can be dissolved in water, burned or precipitated. Hydrogen sulphide is easily ignited under normal conditions. When the concentration of hydrogen sulphide is very low, it gives off a rotten egg odour. When the concentration is high, the odour disappears as the olfactory system is paralysed.

Hydrogen sulphide is a very powerful neurotoxin. When a person inhales too much of it, it can irritate the mucous membranes and cause poisoning. Mild poisoning may cause symptoms such as tearing, red eyes and dizziness. Severe cases may lead to consequences such as neurasthenia and vegetative nerve disorders. It can be said that the toxin contained in hydrogen sulphide is very strong.

Hydrogen sulphide is also a flammable and explosive chemical that forms explosive mixtures when mixed with air. When exposed to open flames or high temperatures, it can cause combustion and explosion.

The hazardous threshold concentration of hydrogen sulphide i...

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