Archive for the ‘Scales’ Category

An analytical balance is a beam balance that has an incredible amount of precision. It is used in scientific laboratories across the globe as a tool for weighing chemicals. It is most often used in quantitative chemical analysis. It can typically measure the mass of an object to an accuracy of plus or minus .0001 grams. However, analytical balances can usually only measure small samples up to 320 grams.

The weighing pans that are used for such high precision weighing are enclosed inside transparent enclosures with doors. This is to prevent dust from collecting inside the pans and affect the weight measurement. The dust can also affect the parts that are used for weighing – such as knives and bearings. Metallic dust is especially harmful to these parts. The enclosure also keeps air currents inside the room from affecting the operation of the balance. Analytical balances are extremely sensitive and because of this sensitivity, they must be used and maintained properly.

When a laboratory orders an analytical balance from a reputable retail provider, it is important to assemble the balance properly. There are incredibly important knife-edges and delicate parts that should all be packed separately for shipping. When assembling a balance, it is important to move slowly and carefully and steady your hands against a solid object. Make sure before you start that you know where all the parts go and how to get them in place without extreme force. Be extremely careful of the knife-edges that should be packed separately. A tiny blow of these knifes against any edge can ruin them.

Other factors to consider before and during assembly are that the balance should be solidly and very firmly supported on a bench or table. This bench or table should be mounted to the floor or to the wall for extra support. It should be placed in a location free from vibration. Some balances come with built-in vibration dampers but if not, mounting it on a heavy slab with sponge rubber cushions to eliminate vibration is recommended. The balance should also be protected from air currents and temperature. When the door on the balance is opened it should not have any exposure to wind or drafts. It should be away from flames, chemicals and extreme temperatures so that convection currents cannot set up inside the enclosure and affect the measurements. Even high-powered lamps can cause a temperature change great enough to get the balance off. A 30 to 50 watt lamp a few feet from the case should not cause any great problems.

In order to protect the balances from dust, temperature and air currents many laboratories have found it advantageous to install rooms, with air conditioning for maintenance of constant temperature and humidity. This just depends on the level of accuracy your lab might need from the analytical balance.
Any scientific laboratory or other entity needs to take all of the above into account when unpacking, determining a proper location and setting up the balance to ensure proper weighing and mass measurements of these small compounds and chemicals.

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Many types of businesses use floor scales. Practically any company that includes a warehouse full of inventory could use a floor scale. Freight and shipping companies could use floor scales to weigh pallets and other items. Airlines may use floor scales to weigh luggage and other containers that are to be placed on their airplanes. Floor scales are made in many different weight capacities and models. Many floor scales have the same basic features, but there are also specialized features on the models of several different floor scales.

Choosing a floor scale for your business should not be a difficult decision. You must simply review the needs of your business and what your business will be using the floor scale for and then investigate the different makes and models of floor scales available on the market today. Below are two types of floor scales and a brief description of each scale. This guide should be helpful to you in choosing a floor scale that is proper for your business and business needs. .

Cardinal – Cardinal makes a floor scale model called the Guardian. The Guardian is classified as a wash down floor scale model. The Cardinal Guardian has a weight capacity of up to ten thousand pounds with an accuracy rating of one pound. The platform size of Cardinal’s Guardian comes in two options, from four feet by four feet for a total of sixteen square feet of platform space to five feet by five feet for a total of twenty five square feet of platform space. The Guardian is a perfect floor scale for harsh environments because of its rugged construction. This floor scale has a stainless steel deck, frame, and the load cells are corrosion proof and explosion proof. There is no electrical power in this scale because it uses hydraulic load cells. This lack of electrical power makes the Guardian perfect for wet environments. This means it could be used outdoors where it could be possibly exposed to rain, this scale can be pressure washed if used in chemical environments, or this scale can be used in marine applications. Depending on the features you choose for the Guardian, the price range is from about five thousand dollars to approximately ten thousand dollars.

Weighmax – Weighmax makes floor scales that are rough, rugged, and affordable. The Weighmax floor scales have full steel frames and high quality load cells. These floor scales are very well built and can handle lots of strenuous use. The Weighmax scales are classified as heavy duty shipping scales, so this type of scale would be perfect in a shipping environment. These floor scales have a two hundred percent overload capacity, technical support to connect to a computer or printer, and a NEMA approved swivel indicator. This scale can be purchase with a platform size of four feet by four feet (sixteen square feet), or five feet by five feet (twenty five square feet). This scale also comes in different weight capacities from five thousand to ten thousand pounds. This is a very affordable scale with a price range from $579 to $679.

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