What are the consequences of adding an external filter to air sampling?

Responsibly, the addition of an external filter for air sampling is a solution. It's not as bad as a netizen said.

External filters.

First of all, back to why the external filter is installed, there are two reasons: 1. The environment is harsh, and there is more dust in large particles of smoke (non-fire smoke); 2. There are other substances in the environment that affect the normal operation of the air sampling detector, such as corrosive gases.

1. Use a filter to filter large particles of smoke and dust to reduce the pollution of the detector or reduce the frequency of replacement of the built-in filter.

Built-in filters.

2. The filter is mainly used to treat corrosive gases to avoid damage to the inside of the detector.

With an external filter, the resistance of the external filter can be achieved by increasing the power or speed of the suction pump. In addition, in this case, the pipe length design can only be appropriately reduced. The longer the pipe is not always better, and it is correct to make a suitable design according to the site environment.

When using an external filter, it is clear that the resistance to air sampling will be increased, which will make the air sample collection time longer, so the total length of the air sampling tube must be shortened to prevent the distal sampling hole from failing due to excessive pressure loss. According to the national standard, the air sampling detector must be able to transmit the air sample from the farthest sampling hole back to the detector within 120 seconds and make a detection response, if an external filter is installed, it is obvious that the total length of the air sampling tube must be shortened to meet the national standard. But we've found that many vendors don't tell their customers about this problem, and their customers are exposed to risk.

In addition, the alarm time delay method is used to avoid false alarms, because the alarm time is delayed, and similarly, the air sample from the farthest sampling hole will not be able to be transmitted back to the detector within 120 seconds, so the total length of the air sampling tube must be shortened to comply with the national standard. Often, customers are also kept in the dark and unaware of the risks.

The benefits can be placed in the cabinet of the fish tank on the surface is invisible, the space is more filter material, the noise is very small, if you have money, you will buy Ihan's, if you don't have money, you will buy at's plug-in, it is not recommended to use Jiabao's quality is very poor.

Generally, the filter cartridge is used on fresh water. Sea tanks are used less.

Because its efficiency is not very high. (Limited filter media).

Shortcoming. **Expensive. It's not very cost-effective.

Not very safe. It is generally placed on a low cabinet. If there is water seepage. The consequences are unimaginable. (Such a column.) I've had it too).

Generally not professionals are also difficult to install. It's more troublesome.

The benefits are: can be universal. No matter how big the tank. Freshwater and seawater can fool others to put it on.

The external filter filtration efficiency is very high, the maintenance is simple, the noise is small, it does not occupy too much water space, and the chemical properties of the water can also be adjusted by selecting the filter material, so it is a high-end supporting equipment for larger aquariums, especially suitable as a feeding equipment for tropical fish of the lipid carp family and the South American cichlid family that like a clean and soft water environment, and is the preferred filter for aquariums for planting aquatic plants.

At present, the imported external filter is of good quality, but also more expensive, although some domestic brands are lower, but the quality of the pump is often not up to standard, and some are replaced by submersible pumps, which affects the use effect.

It will suck in dust and damage the cylinder.

Air compressors must have an air inlet filter. Otherwise, the air compressor will inhale debris and dust after loading and running. It will damage the main engine and lubricating oil, etc.

The main filter medium of the air filter is the moisture, oil, solid particles and peculiar smell in the air, as for the harmful gases you said, the ordinary air filter can not be filtered, which has high requirements for the filtration coefficient.

In short: if there are special requirements for filter media, it is recommended to consult regular manufacturers.

You can filter it if you turn it around! The principle of an air filter is that small particles pass through and large particles are retained. The reverse is actually not much. The biggest impact is on the filter media. The filter media may be damaged.

It doesn't work, but it doesn't work, it doesn't work, and at most the bacteria content will exceed the standard.

The external filter installed on the outside is afraid that someone will steal the water, so there can be nine covers outside, because no one will steal the water because it is fixed.

Put it back on, or put it in a hood.

Check your meter to see how much you pay each month.

If there is a branch to another place, then you will know that someone has stolen water, and you can call the police.

Then there is no filtering effect. Destroying clean air filters is a consumable in itself and needs to be replaced regularly depending on the situation.

Air filters, also known as styles, are an important protective barrier for air compressors. Its main function is to filter out the dust impurities in the air entering the air compressor, so as to ensure the quality of compressed air, protect the cleanliness of the air compressor, and prevent other foreign substances from damaging the oil filter, oil-air separator, lubricating oil, main engine and other related components.

The most important part of the air filter is the filter element, and the filter element is generally made of high-precision imported filter paper, and its service life is generally 1500 2000 hours. That is to say, after this service life, its filtration effect will be greatly reduced or even invalid, unable to meet the normal working requirements, so it must be replaced.

The damage caused is enormous, so you must not use it with this kind of luck mentality. Here are a few examples of common hazards:1

It causes foreign matter to enter the air compressor, affecting the service life and working efficiency of the internal accessories and lubricating oil of the air compressor. 2.

Once the air filter is overdue, its resistance will inevitably increase, which will lead to an increase in energy consumption and waste in the entire air compressor system. 3.

It does not have a good filtration effect, which affects the quality of the compressed air. 4.

It leads to a decrease in the suction volume, which affects the reduction of the exhaust volume of the air compressor and affects the normal production. From the above, it can be seen that air filters have a standard service life, and once the service life is exceeded, they must be replaced in time, otherwise it will cause a series of bad effects

Air filter is the abbreviation of air filter.

The engine has to suck in a large amount of air during the working process, and if the air is not filtered, the dust suspended in the air is sucked into the cylinder, which will accelerate the wear of the piston group and the cylinder. Larger particles enter between the piston and the cylinder, causing a severe "cylinder pulling" phenomenon, which is especially acute in a dry and sandy working environment. The air filter is installed in front of the carburetor or intake pipe to filter out dust and sand particles in the air and ensure that sufficient and clean air enters the cylinder.

According to the principle of filtration, the air filter can be divided into filter, centrifugal, oil bath, composite type, during maintenance, the paper filter element must not be cleaned in oil, otherwise the paper filter element will fail, and it is easy to cause a speeding accident. During maintenance, only the vibration method, the soft brush removal method (to brush along the wrinkles) or the compressed air backflush method can be used to remove the dust and dirt attached to the surface of the paper filter element. For the coarse filter part, the dust should be removed in time from the dust collection parts, blades and cyclone pipes.

Even if it can be carefully maintained every time, the paper filter element cannot fully restore its original performance, and its air intake resistance will increase, so when the paper filter element needs to be maintained for the fourth time, it is generally necessary to replace the new filter element. If the paper filter element is cracked, perforated, or the filter paper is deglued from the end cap, it should be replaced immediately.

The first function of the air filter is to intercept.

When the motion of the particles hits other objects, the van der Waals force between the objects causes the particles to stick to the surface of the fiber. The dust entering the filter media has more chances of hitting the medium, and it will stick when it hits the medium.

Air filter function 2: electrostatic effect.

For some reason, fibers and particles can become charged, creating an electrostatic effect. The filtration effect of electrostatic filter material can be significantly improved. Reason: Static electricity causes the dust to change its trajectory and hit obstacles, and static electricity makes the dust stick more firmly on the medium.

The third function of the air filter is to filter the substance.

In fact, the air filter is to filter the solid substances in the air, such as iron filings or sand particles, but these substances will damage the piston sealing ring, block the small exhaust holes on the components, shorten the service life of the components or make them ineffective. The function of the air filter is to separate the liquid water and liquid oil droplets in the compressed air, and filter out the dust and solid impurities in the air, but not the gaseous water and oil.

As the name suggests, it is to filter out impurities in the air.