Measurement Density Using a Weight Scale

Intelligent Weighing Technology supplies a complete range of high-quality laboratory balances, industrial scales, load cells, and weighing accessories. Its leadership team has more than 70 years’ experience in the weighing and measurement business, both in the USA and worldwide. With its 8,000 square foot facility, Intelligent Weighing Technology offers increased product inventory for faster shipping. We appreciate them providing the content below.

Have you ever heard of Under Weighing Hooks or Below Balance Weighing?

This is a large section of the weighing business that is often overlooked. Of course, many weighing balances have the ability to “under weigh” by the use of a hook that is connected to the weighing mechanism, and much of the time this is used only to weigh items that are too large or bulky to fit on the platform or in the weighing chamber on an analytical balance.

But there is another sector of weighing that is more complex;

Density Determination.

measuring density using a scale

Measurement Density Using a Scale

In this field, we look for the density of our material by using Archimedes Principle of weighing the item in air and then in a liquid. One of the largest industries to use this method of testing is the construction business.

Customers use this for identifying the density of anything from Bitumen in road surfaces, concrete, to core samples taken from the ground where construction is going to take place. Here, an end user will weigh the core sample suspended from the under-weighing hook, (normally in a basket with holes) in air and then, using a bath of water, suspend the core in the water and weigh it again. (Still in the basket).

Seems a  bit complicated? But, with use of a suitable “Below Balance Weighing” device, these measurements are easy to accomplish. The balance will not see the weight of the water, just the effect of the water on the object.

Note! For correct results, the water should be free of contaminants and the temperature of the water is a variable that should be taken into account.

Generally one of these “under balance weighing” balances or scales is not difficult; the customer almost always is familiar with the formulas. For instance, in the construction business often the state has already specified the tests and interestingly, what weighing equipment to use. (Certainly 0.1 g and capacities varying from 3000 g up to 20,000 g)

Density is required for many industries, all you need to do is know which balances have under-weighing capability or, in the case of analytical balances, which ones can have the density kit fitted. The more sophisticated balances have a density program included, so an end user can easily input the data he/she needs to get an accurate and consistent result. Many low capacity balances, such as analytical balances, have density kits that can be purchased; simplifying the process even more.

In fact, the more sophisticated electronic balances have a density program to lead users through the process. So! That is density in solids. There is some scratching of heads when we talk about densities in liquids. How can you do that???

Well, instead of suspending the object in a liquid such as water, you suspend an object of a known weight in the liquid to be tested, sometimes known as Gravimetric Displacement.

In conjunction with the Density Kit, an optional glass sinker enables you to determine the density of liquids. The difference of the weight of the sinker in air and in the liquid is
used to calculate the density.

To recap, the area of density determination with digital scales involves terms like “undeweighing” or “below balance weighing”. Please contact the sales team at Central Carolina Scale (919) 776-7737 or complete our Request a Quote form on the website for assistance with a particular application.

Buy A Lab Balance And Adam Donates Money to African School

To help commemorate Adam Equipment’s 40th anniversary, Adam Equipment has pledged a financial contribution to support the expansion of the Star School in Rwanda, through the Mission Possible global initiative.

In an effort to increase the number of students taught in the primary and secondary classrooms, the school sought to increase the building capacity through a new facility. The building will provide space for an additional 280 students to enroll in classes. This project will increase educational opportunities for the children served by Star School, giving them a chance at a better future and helping them to learn key skills that will provide a lasting effect. The project is scheduled for completion in January 2013, in time for the new term.

Adam has already presented the first of several payments to the Star School, helping to cover the cost of building a larger facility. Construction has started, with the pouring of a foundation for the new structure. This is one small way in which Adam Equipment hopes to commemorate their anniversary and give back to the global community.

For every PW analytical balance, PGW precision balance and PMB moisture balance purchased from now the until end of November*, Adam Equipment will donate an additional $15 to the Star School project. We hope you will take this into consideration as Continue reading

Scale Requirements for Buying Gold

From time to time, someone will contact us looking to start a business buying back gold jewelry from customers. With the price of gold recently it’s becoming more popular than ever. However, there are some real important things to consider. The scale being used to weigh the gold needs to be a precise and accurate scale. In many states, that means the scale used for weighing gold needs to be NTEP approved legal for trade.

For example, in the state of Michigan, the following information is listed on their website regarding buying and selling precious metals. See more at http://www.michigan.gov/mdard/0,4610,7-125-1569_19192_21233-233502–,00.html

The Office of Weights and Measures has received numerous inquiries from local authorities responsible for issuing licenses, and individuals buying and selling gold from retail or residential locations. Operators of businesses buying and selling such commodities by weight in the State of Michigan must comply with the requirements of the Michigan Weights and Measures Law, Public Act 283 of 1964 as amended. Business operators must also check with local authorities for specific requirements of local ordinances and licensing requirements that apply. State Law requires that all commercial transactions conducted, based upon a determined weight, must be conducted with the use of an approved scale.  Below is a summary of the basic requirements for all commercial weighing and measuring devices (scales/meters).

 

  • Scale used is Class II or Class III, NTEP (National Type Evaluation Program) approved (legal for trade)
  • Scale used is tested onsite prior to use by an approved Michigan Registered Agency (third party) or a State Weights and Measures Official
  • A Placed in Service Report and a test report for the device are submitted to the Office of Weights and Measures Continue reading

Ideal Choice For Basic Portable Balances

CORE Portable Balances offer the ideal choice for basic weighing with simple operation and outstanding value.  Compact and durable, Adam Equipment Core balances are the best choice for basic weighing in laboratory environments, junior high school science class, or anywhere you need to weigh light items accurately.  The simple keypad with dual tare keys and a bright backlit display make Core balances easy to use. The tough durable ABS housing is designed to withstand field and laboratory environments, while being easy to clean and protected from accidental spills. With built-in ShockProtect™ overload protection Core balances can handle excessive overloads without a problem. Complete with a removable draft shield, AC adapter, and integral security slot, Core balances are ready to work right out of the box. Continue reading

PW Analytical Balances Feature Value and Performance

Adam Equipment provides a high quality range of laboratory balances, top-loading balances and moisture balances, which are ideal for any type of laboratory, and an extensive range of portable balances covering a wide variety of weighing applications. PW Analytical Balances feature Capacity range of 120g to 250g. The PW series of Analytical Balances are designed to meet the needs of Laboratories, Schools, Industry and commercial users offering a wide range of applications. Adam Equipment’s PW Analytical balances showcase an attractive yet functional design along with advanced features making the PW series your best choice for the laboratory.

The PW Analytical balance incorporates a deceptively simple user interface for easy setup and control of a wide range of smart functions. Internal calibration, security features, and simple and advanced weighing applications can be executed on the spot, without the need for complex calculations. All the PW’s features are packaged into a high power, high performance balance, saving time and resources.

Adam PGW Lab Balances are Built For Everyday Use

All metal construction, an oversized backlit display, and simple, intuitive operation make the PGW a winner in laboratory and industrial applications. That’s because every PGW comes LOADED with solutions for the critical issues that users face: Reliability – The Adam Equipment PGW balance offers proven processing technology plus GLP and custom printouts with date and time, and a capacity tracker to monitor weighing range. Flexibility – Choose a PGW model with internal or external calibration and customize text prompts in English, Spanish, French, or German. Simplicity – The PGW boasts an oversized backlit display with 24mm digits plus modes to meet every lab’s need: counting, percentage, animal weighing, check weighing, net/total, & auto density calculation.

* 18+ Weighing units (including one custom unit)
* Selectable digital filtering for animal / dynamic weighing
* Adjustable filters
* Simple user-friendly operation Continue reading

What will it cost me if I don’t buy a good scale?

Choosing the right scale and the right scale company for your application is extremely important. Whether you are looking for a small Ohaus balance or a large Rice Lake 80 foot long Truck Scale, you can save a lot of time and headaches by choosing the right company from the start. Even in today’s tough economy, consumers need to understand the total cost of ownership. For example, downtime often is the most significant cost incurred in industrial settings. In operations like landfills, aggregates, and quarries, many vehicle scales act as the “cash register.” If the scale isn’t Continue reading