Small electric scales can be found in a great number of modern homes, and are not necessarily being used in the way that most people may first guess. Today people are using scales for more than tracking how much they weigh. Although bathroom scales that measure in pounds are still the most common household scale, many people are also using small electric scales in the kitchen as part of their daily food preparation routine. These scales, which are sometimes referred to as dietary scales, measure in either grams or ounces, although many newer scales have a built in conversion function. Dietary scales are a must-have tool for people who want to know exactly how much food they are preparing or consuming in the home.

But the small electric scale is not only used in the kitchen. It is used in the home office as well. They are also frequently used by people who own their own small businesses. Scales are an almost unavoidable part of the process of sending mail and packages. If you’re mailing it, then chances are that it’s going to be weighed at least once before it reaches its destination. Many business owners and home workers are streamlining the process of sending mail by weighing it themselves in their offices. This way they can either immediately affix the appropriate amount of postage, or they can find out how much it will cost them to send the mail and plan accordingly.

The small electric scale is also often used by businesses for which consistency in product portion size is important. For example, an entrepreneur who makes, packages, and sells her own line of bath products might use a scale to ensure that each bar of soap that she sells is of an acceptable and somewhat uniform size. In weighing her product before she sends it out, this businesswoman is making sure that neither she nor her customer is getting cheated. Her scale will help her build her product’s reputation.

Small electric scales which are being used by businesses and in the home are well-suited for their respective uses when properly calibrated; however, unlike some other small scales, they are not known for their extreme accuracy. Ultra precision scales are used in laboratories and in other settings where accuracy in measurement is of the utmost importance. These types of scales, which can be quite expensive, are made using some of the very latest technology in scale manufacturing. They are very sensitive and can give readings that are accurate down to mere parts of the increments that other small scales use.

The balance scale, which was the only kind of scale around for hundreds of years, had a fairly basic design. It consisted of a mounted beam with arms of equal length, and pans, or scales, suspended from the end of each arm. An object of unknown weight was placed in one pan while standard weights were added to the unknown pan. The user would place weights in the pan opposite the item being weighed until the two pans were level. Then the user would calculate the weight of the object in question by counting how many weights he had placed in the opposite pan. Although the balance scale was the primary scale used all around the world for many years, today we have other types of scales to choose from.

The spring scale was invented by Richard Salter in 1770. A spring scale works by measuring the amount of force an object exerts on a spring. This amount of force is directly proportionate to how much the object weighs. Spring scales, which are sometimes also called Newton meters, measure force in Newtons, but today’s scales often offer users readings that are already converted to weight in kilograms or pounds. Spring scales come in different forms. Some, like older bathroom scales, are flat and have internal scales. Others are hanging scales, meaning the object being weighed is suspended from a hook or pan that is on one end of a spring.

The digital scale is another, very popular type of scale that is used today. Digital scales are basically electronic versions of the spring scale. They work by measuring how much force is exerted by the weight of the object placed on the scale on a beam inside the scale. Digital scales are available in a many sizes that can accommodate objects that weigh anywhere from grams to tons. Some examples of these scales are food scales and modern weigh bridges, respectively.

The average person today most commonly uses digital scales and spring scales, and may encounter these weighing scales in a variety of places in their everyday life. For example, many people have digital or spring scales in their bathroom or in their kitchen. It is also very common for the average person to have to see either a digital or spring scale at their local grocery store or market. Today, digital scales for weighing meat and produce are built right into the checkout line.

The following is an overview of different types of small digital scales, listed approximately from highest to lowest resolution.

• High resolution scales

These types of scales are suited for laboratory use in universities.  Ideally, they should include a tare function for zeroing weighing vessels such as weighing paper or trays.  A standard feature is display capability for different weighing units, most commonly, ounces and grams.  The desired resolution for these scales is 1 mg, a requirement met by scales with maximum weighing capacities of 750 mg.  For pharmaceutical applications, the resolution should be 0.1 mg.

• Counting scales

Counting scales are useful for measuring quantities of items whose weights are consistent.  They often have a memory feature that stores the weight of as much as 450 different items, which eliminates the need to weigh a standard sample every time.  Fulfillment centers  use these scales for counting products quickly and accurately. Document control and business card supply companies often use them to count sheet paper and business cards. Utilizing counting scales for fulfillment purposes is advantageous to a business because it reduces quantity errors on product orders, which leads to greater client satisfaction.

• Rain gauge scales

The scale method of measuring precipitation is superior to standard graduated rain gauges in that the weight, rather than the volume of precipitation is measured.  This confers greater accuracy, since water tends to stick to the sides of standard rain gauges, resulting in under-estimates of actual precipitation.  Another advantage of using rain gauge scales is the option of using a meter that measures the amount of chemicals present in the precipitation, for the purposes of quantifying environmental pollutants.  These scales must be resistant to moisture, corrosion and extremes in temperature.

• Industrial bench scales

Bench scales have a display that is attached to the weighing platform by an electronic cord, and can be interfaced with a computer for advanced computing features and functions, including displaying and recording weight data.  A label, paper, and card printer may also be attached.  They are used in postal services, shipping and receiving centers, as well as the food and restaurant industry.

An Englishman named Richard Salter revolutionized the world of weighing scales in 1770 by inventing the spring scale. Before Salter’s spring scale, the balance scale, which was invented in approximately 4000 BC, had been the longtime standard in weight measurement. He and his nephews John and George went on to open a very successful business selling scales and balances and patent the spring balance in 1838.

The hanging spring scale can be as simple as a hook attached to a spring, which is fixed at the opposite end, and has a variety of possible applications. It can perhaps most commonly be found in the grocery stores in the produce section. The suspended scales which people use to weigh their produce are perfect examples of hanging scales. They can also sometimes be found in the deli section of the supermarket.

Hanging scales are often used on farm and in factories, and can easily be purchased with up to a 10,000 pound capacity. Hanging scales are also used in more industrial settings. Cranes can be equipped with hanging scales in order to building materials at construction sites or other very large objects.

One of the advantages of using a hanging scale over other types of weighing machines is their portability. A small hanging scale can be attached to a variety of surfaces. Additionally, especially in the case of crane scales, hanging scales can be maneuvered in to weigh things that could not otherwise be reached or are difficult to move. For example, hanging scales are often used by medical facilities to weigh handicapped and bedridden patients.

One of the disadvantages of using a spring scale, in particular, is that they are sensitive to the gravity of the place in which they are used. This is because the spring scale measures the force an object exerts on the spring inside the mechanism. This means that because gravitational force varies in different parts of the world, spring scales can give different readings of the weight of the same object when placed in different locations. Because of this if the user wants an accurate reading many spring scales must be recalibrated taking into consideration the gravitational pull of their current location before using their scale.

Fortunately today digital scales are available for purchase that offers the user the option to have their scales automatically calibrate themselves. Digital hanging scales in particular have become quite popular and can be found in every industry from food stores to construction sites. Digital hanging scales with stainless steel load sensors are ideal for industry, as they are more rugged and durable.

When we are heading out on a long drive, planning an outdoor party, or planning to go for a walk outside, we like to know whether it will rain, when, and how much. However, in many situations, it is important to know whether it rained in the past, when, and how much. Farmers, for example, depend on rain for their crops. If it does not rain the right amount and a drought is expected, they must choose another plant variety to grow or suffer crop failure. Cities rely on rain collected in reservoirs for their yearly supply of water for showering, drinking, watering plants, and other activities. If it does not rain enough, these activities must be restricted. If it rains too much, or at the wrong time, a city may flood, causing long-term damage.  Environmental researchers are interested in precipitation data to track trends in the climate on the local and global levels.

There are several ways of measuring precipitation. Cylinders may be placed in different areas, and as it rains or snows, this precipitation falls into the cylinders. A person must then drive around to each cylinder and record the current measurement. This may cause problems as the cylinders may overflow. In addition, it is not efficient to travel to every cylinder and this method gives no data on when and how quickly the precipitation fell.

A much more accurate method of determining how much precipitation has fallen in any area is with a rain gauge scale. A bucket is placed on the electronic scale, and the rain gauge scale measures the total amount of water in the bucket. Since electronic rain gauge scales must be kept outdoors, they must be able to survive extreme temperature and precipitation. High-quality scale manufacturers like Arlyn Scales use stainless steel load sensors rather than aluminum load sensors in order to prevent corrosion. In addition, these high-quality rain gauge scales can be built with USB ports to allow for detailed record-keeping, including time data, on a high capacity flash drive.

Although the internet is becoming the media of choice for sending out advertisements and bulk mailings, traditional postal service is still often used to send out advertising fliers, glossy postcards, or product samples. When a company chooses to send out a bulk mailing, it can pay a special bulk postage rate to the United States Postal Service. However, in order to get this special price, the company has certain responsibilities. It must sort the mail according to postal rules, report the weight of one single piece of mail and a batch of mail, and then report the total number of pieces that are being sent out.

Digital parts counting scales are the perfect solution to a business’s mailing needs. This electronic scale first calculates the weight of each piece of mail. The operator places a known number of pieces on the scale and enters the number of pieces that are being weighed. This industrial scale then divides the total weight by the number of pieces to calculate a piece weight. The scale is then switched into counting mode. When all of the pieces of mail are placed on it, the electronic scale divides the total weight by the weight of a single piece to calculate the total number of pieces being mailed.

When sending out particularly large bulk mailings, it is important to have a scale that has a large capacity while also having a high enough resolution to be able to accurately determine the weight of one single piece of mail. Ultra-precision SAW scales, a new technology developed and manufactured by Arlyn Scales, are a good example of a large-capacity, high resolution digital scale. A SAW scale with a 100 lb. capacity has a resolution of .001, allowing for a very precise count of a very large number of pieces of mail.

This data recording can be done by humans. However, this opens up the possibility of human error-the data may be recorded incorrectly. Sometimes, digital scales may be connected to a computer using a standard communication protocol such as RS-232. But if the computer is not in the vicinity of the scale, this introduces the issue of running long lengths of wire which is both expensive and time-consuming.

Scale manufacturers that offer the newest technologies, like Arlyn Scales, now make electronic scales with optional built-in Universal Serial Bus (USB) ports. Standard USB thumb drives can be plugged into these ports, and weight data from the industrial scale can be recorded on these memory devices. The digital scale can be programmed to automatically load the data on its screen onto the thumb drive at pre-set intervals such as every hour, every minute, or even several times a second. Or, an operator can press a button on the control panel of the scale to record the data at that point.

Once data has been stored onto the USB thumb drive, the device can be removed from the USB port of the electronic scale and the data can be imported into a database or spreadsheet program on any computer that has a USB port. This method of copying data from industrial scale to computer is very cheap, with 4 GB thumb drives costing as little as $10.

For all of these reasons, there are many rules and regulations pertaining to the management of hazardous wastes. Some of these simply define what materials and items are deemed to be hazardous and which are not. Others outline the methods required for physically handling hazardous materials. There are specifications for the types of clear and accurate documentation that must be maintained.

Much of this documentation is associated with the amounts of these materials. Generally, they must be weighed at all steps in the process. Clearly, it is important to know how much material is generated. That can be determined by using a good quality industrial scale. Depending on the amounts and type of hazardous waste, this could be a bench scale with resolution as high as 0.001 lb. If it is a liquid that is stored in a pail, tank or drum, then a drum scale would be considered. Cylinders of hazardous liquids and gasses are weighed on cylinder scales. Platform scales, floor scales and pallet scales are used to weigh larger containers, totes and larger tanks. The weight can be recorded by hand onto the proper form. Alternatively, Arlyn Scales offers computer interfaces for most of their electronic scales. Weights can now be automatically stored in a database file, or can be printed on labels and other types of forms. It is even possible to use a USB memory stick to log the weight information from these digital scales, along with the time and date of the weighing action. This is particularly useful for maintaining high quality records.