Top Uses of a Magnifying Glass

The magnifying glass is known as one of the oldest instruments used to improve sight. Modern magnifying glasses are double-convex lenses and they make the objects appear larger. The lens is convex on both sides, i.e. thicker in the middle. When viewing objects the light rays are bent towards the centre of the lens, making the object look larger than it is to the eye. Every magnifying glass has a focal length, which are the distances from the optical centre of the lens to the point where the light rays converge. The focal length of any lens is determined by the radius of the curve on the face of the lens. The mathematics that describes magnification is relatively straightforward and can be found in comprehensive physics textbooks.

Top Uses of Magnifying Glasses

Where would we be if we did not have magnifying glasses? They come in handy for a variety of things. Let's take crafts, for instance. Whether it is knitting, embroidery or some other handiwork, magnification can be the difference between a perfectly finished project, and something only a mother could love. If we could not see fine details, imagine all the handmade sweaters with dropped stitches walking around on the backs of people oblivious to wearing clothing that looks like Swiss cheese. Or all the stitched samplers on the walls of homes everywhere that are less than complete. More often than not, angled hems or crooked letters would take the place of symmetry and order.

If you are putting together a model without the use of a magnifying glass, your chances of having hardware left over increase exponentially. Tiny screw holes can be overlooked, the installation of a minuscule washer may be missed or a microscopic dowel might be forgotten. As a result, it's more likely that your miniature areophane, slot car or birdhouse might not perform exactly how it should. Even if it's just for show, it should be secure and complete and not fall apart on the shelf.

If you find it difficult to use a hand-held magnifying glass online, you can attach one to your eyeglasses or wear one around your neck. Voila! Hands-free vision. This is handy because when you're working on a task, you need both hands. You need one hand to hammer and one to hold the nail. One hand to hold the hoop and the other is to hold the needle to make the stitches. And have you ever seen someone try to knit with one needle? I think they call that crocheting and you still need another hand to guide the yarn. So without an apparatus to magnify the projects, you are working on, a lot of fine details may be missed. Fine details may lead to larger details, and the next thing you know, you're opening a gift from your mother and trying to keep a straight face when you discover the sleeves on your new handmade sweater are knitted shut. It looks like you might be getting mother a magnifying glass online or lamp next year.

Why Do You Need a Magnifying Glass in the Laboratory?

The first step in making your selection is to decide exactly how you want to use your magnifying glass. Will it be used to read a newspaper or a book, read the fine print on a map, or a finely printed prescription label? Do you want to read a menu in a restaurant, examine a diamond or gemstone? There is a wide range of different types of magnifiers in addition to the popular lollipop or Sherlock Holmes shapes, such as Head Visor magnifiers and the pendant necklace magnifying glass. You can choose pocket or purse folding magnifiers, an eye loupe, and tabletop magnifiers and round the neck hands-free magnifiers. You can find lighted magnifying glasses including LED lighted jewelers’ loupes, lighted pocket magnifiers and lighted handheld magnifying glasses. You can find the type of magnifying glass to meet your specific requirements.

What Does Focal length, Field of View and Depth of Field Mean?

Magnifying Power is the ability of the lens to increase the visual size of an object. The X (times) is used to identify this factor. A magnifying lens bends light rays resulting in an image that looks larger than the actual object. For example, a 3X magnifier triples the size of an image, 4x magnifies 4 times, 5x five times and so on; Focal Length or Working Distance. In addition to power, a magnifying glass can also be classified by its working distance. The higher the power of a lens, the shorter is the working distance (the distance between the object and the magnifier). For example, a 2X lens has a working distance of 5". Field of View is the size of the area that you see through the magnifying glass. The field of view becomes smaller as the magnifying power increases.

The depth of Field is the distance in which a magnifier can be moved above an object and still have the object in focus. The higher the magnification, the shorter is the depth of field. Choosing where to buy your magnifying glass online is just as important as selecting the magnifying glass. Here are some suggestions on how to find the right place to make your selection. You want to make your purchase from a company that offers you an unconditional guarantee.

For example, if you order your magnifying glass online and then discover that it's just not the magnifying glass you need, you should be able to return your purchase for another selection or return it for a full refund. You may not find a retail store that has what you want and you may have to place your order on the internet. That's why it is most important to find a seller who unconditionally guarantees your satisfaction.

Will One Size of Magnifier Meet All Your Needs?

Probably not, but one very popular solution gives you A choice of several handheld magnifying glasses sold together in sets. These provide multiple magnifying powers and varied diameter lenses that can be used as needed for different purposes.

The Correct Technique of Using a Digital Refractometer

A Refractometer is the most effective instrument that measures the refractive index of gases, liquids, and solids. It is a non-invasive device used to measure the speed of the light reduced in any solution. Inside it, a shadow line appears which can be viewed with the help of magnifying eyepiece. In short, it is used for the identification of the substances. It is commonly used in beer making industry, vision care, and veterinary medicine or in the study of gems. In vision care, it is used to test the eyesight and the nature of the glasses.

Digital Refractometers

Digital handheld is most popular for its tolerance, lightweight and water resistant abilities. These features help to do as many as measurements in a very short period of time. The laboratory Refractometers are the best solution for the people who want results in parameters or outputs

They are the most popular as they are very easy to use. To use them you need to deposit juice in a well that allows a light emitting diode (LED) to reflect light through the prism. Once you deposit your juice you need to wait for only a few seconds and you will see results in the LCD screen. In addition to giving fast results, they also give accurate results. Their main flaw is that they are quite expensive.

Techniques to know to control a Digital Refractometer

For refractometers to last for a long time, you need to take good care of them. Here are tips on how to take care of them:

Wet environment

You should never expose the digital refractometers to wet environment. Once you are through with the analysis or you want to store them, you should clean and dry the prism. One sign that you have exposed your digital refractometer to wet environment is cloudiness of the field of view. When this happens you should ask a professional technician to help you out.

Right use

You should never use the digital refractometer for the wrong purpose. For example, you should never use a digital refractometer to measure saline solutions. To be on the safe side you should buy a digital refractometer that is designed for the solution that you are interested in evaluating.

Storage

In addition to ensuring that you store the digital refractometer in a dry place, you also need to ensure that the storage location has a constant temperature. Research studies have shown that storing the refractometer in a location whose temperature fluctuates by up to 5 degrees Fahrenheit you risk damaging the optics and prism.

Conclusion

You should always handle the digital refractometer with great care as dropping them can result in breakage, scratching or displacement of the optics or prism. Their results are more effective in a well-maintained, clean running and recently charged systems. It really does not matter for which reason you are using this instrument, they come in a large range of variety at a very affordable rate. The only part is calibration as it refers to the accurate reading. In order to calibrate it, one can put some drops of RO/DI. They help you to eliminate all the mess with no use of moving parts.

Top Digital Refractometers that You Can Buy in 2018

There is a considerable amount of progress in the technology of scientific lab devices. Every year research is performed and updates are introduced. Every year new models of devices are introduced.

Digital refractometer, that is used to measure the refractive index of a liquid is an important device used in labs and fields. It has its application in both educational and practical fields. It has also evolved over the years. For example, the sources of error are reduced using the latest technology. The size and the operation have also become much user-friendly than before. As a matter of fact, there are different models, introduced for easier handling in different fields. Let’s look at the latest models of digital refractometers of this year.

Here are the top five digital refractometers that you can buy in 2018: -

·         ART-F touch:This one gives out the highest accuracy in reading and has the continuous reading mode which gives rapid and fast ressults. It is also very easy to use. It has a wide range of sample temperature, i.e, up to 100°C. Owing to its design, it is also very easy to clean.

·         ART-C:It is one of the budget-friendly models of a refractometer. It has a continuous measuring mode and a two lines display. It can also be attached to an external computer. The measurements are highly accurate and the quality of the liquid is also maintained. The sample chamber is flat and easy to handle.

·         ABBE refractometer AR12:The measuring range is broad and the device is very much easy to handle. The volume of the sample needed is not much. It is also very easy to clean. With the help of a contact fluid, it can also measure the refractive index of solids. It is useful for school and education purpose.

·         DHR95:This one is perfect for field analysis. It is handy and at the same time has a 5 digit LED index which makes viewing the reading easier. It works fast and gives out the result in about 2 seconds with reliability regarding the accuracy. It also has an in-built temperature compensator.

·         Handheld:As the name suggests it is a handy one that is perfect for field analysis. There are different models available for this device. It is very quick on spot control. It has a quick spot control and is generally used in fruit or vegetable vegetation. In fact, it is the most used digital refractometer in recent times.

You can look these up online and buy the one that suits your requirements, this way you will get a fair and honest feedback and description that will help you make the right decision. As these scientific devices have a specific use, it is better to do a thorough research before buying. Because, if there is any defect, there is a chance that it will never work. So be careful. Do not compromise with the quality only to save a few bucks. Remember, quality always pays off.