The main purpose for designing the air sampler is to facilitate the agriculture industry. These air samplers are also used in the military, homeland and other defense operations. Sometimes these air samplers are also used by the first response teams and some of the times these samplers are also used by the workers and public of the safety segments.

• Some of the system features of the Air Samplers:

- There air samplers help in collecting and concentrating the invisible chemicals and airborne particles and hence help in purifying the air.

- The air samplers which are categorized under the environmental safety models can collect the dust particles up to a size of 10 µm size range.

- The air samplers which are categorized under the agricultural models can collect the particle of size 10-60 µm size range.

- The particles are concentrated into small volumes of the liquid in these samples in a quantity of 10-15 ml.

- These air samplers also have the pre-separators which help in removing the large sized interfering particles and the best thing about these air samplers is that they can collect the air particles with an efficiency of 70%.

You must have come across people who astonish you by their knowledge of classic cars? Such people are capable enough to recognize the make and model and even the year of any classic car they come across. Although it seems a terrific job but it is not as difficult as it appears to be. Even you can become an expert in knowing all about the classic cars with good practice. Following are certain tips that can surely help you out.

First of all, you will have to sit down and research on the date range of the variety of classic used cars. Keep in mind that those cars are known as classic cars that were built from 1933 until fifteen years ago. However, a vintage car refers to the era from 1903 to 1933 and a Veteran car is supposed to be manufactured(Renting a Classic Car) even before 1903.

You should also start attending car exhibitions and auto-expos to increase your knowledge. Here you will find a good range of classic buy cars that would be separated form the muscle and the antique collection. After that, you should start studying cars by narrowing down your expertise. Pick up any one of your favorite make and models and start studying about it.

Once you are through with the one make and model, you should pick up another one and know all about it. You should also take into notice the variance in different models and their specific features as well. You will have to give in time and efforts to acquire this wisdom.

When you start noticing the finer details of the classic cars, with practice, you will become an expert too in recognizing them on the road.