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It would seem like a safe bet that the people who purchase stethoscopes have a good bit of knowledge about how the devices work and what makes one particular instrument or brand better than the next. Wouldn’t you feel better being treated by  a doctor who can recite endless facts about his stethoscope rather than being treated by one who wasn’t sure which end went in his ears and which went against your skin? However, keep in mind that not all purchasers of medical equipment are in the medical profession. Maybe you are a parent looking to buy a gift for your medical school student. If this is the case, would you recognize the name littman master classic ii stethoscope?

It might help to know that the Littmann brand is considered one of the absolute best when it comes to stethoscopes. Dr. David Littmann (1906-1981) designed and patented the Littmann stethoscope, which from the outset had a great reputation for acoustic performance. The doctor was a highly respected German cardiologist and a professor at Harvard Medical School. Originally, there were two variations to this particular brand. One was designed to be used by doctors and the other by nurses. Much has changed since the doctor introduced his first models, yet the products produced under his name continue to be highly respected.

You can find out much about what makes the Littman products so good online. You should be able to find a good picture as well as details and comments regarding the particular instruments. The Master Classic II was priced in the range of $95 to $140 on several websites. Comments by one person who had used the stethoscope for almost a decade were strongly in favor of the instrument. This person cited the comfort on the ears, the acoustics, which were marked by a lack of environmental sounds, and the durability as strong selling points.

There are many reasons to buy a Littmann, but unless you are in the medical profession and have used stethoscopes and talked with other people about their experiences in this area you probably are not aware of what makes this brand better than the next. To get a better idea, maybe parents should mention the brand to their future doctors to see whether they have a preference. After all, they are the ones who will be reaping the benefits of the gift.

An air cooled chiller absorbs excess heat from processed water. The heat is then transferred to the air surrounding the chiller unit. This chiller system is most often used when the additional heat it discharges does not matter. Sometimes the excess heat is in fact utilized; say to warm a plant during winter, which leads to cost savings. This chiller system requires lower maintenance as compared to a water cooled system. In fact, it also does not need a condenser water pump or a cooling tower. But the air cooled chiller consumes 10 percent more power than the water cooled unit as a wet surface transfers more heat than a dry surface. There are many types of air cooled chillers available in the market, including packaged units, split unites, semi-hermetic units, fractional chillers and portable chiller units. The right chiller system can be selected based on one’s needs and application.