An Analytical Balance is a precision instrument generally used in laboratories that is used to measure very small masses, in proportions less than a milligram in the case of the traditional analytical balance and in ranges that go up to ten thousandth of a gram (0.1 mg) in the case of digital laboratory balances.
The first analytical balance was created in 1750 by the Scottish chemist Joseph Black and has been a staple in chemistry laboratories ever since. Its design and precision has been refined to reach the current, much more precise models.
The most modern balances are so thorough that they have a protective barrier on the measuring plate to prevent air currents or dust microparticles from affecting the final result.
What is the Analytical Balance Used For ?
These types of balances are essential today not only in the chemical area, but also in any other scientific or commercial area that requires measurements below milligrams. The medical and veterinary fields as well as pharmaceutical companies are the main consumers of this type of instrument.
When a very precise measurement is required, the best tool to turn to is the analytical balance. This type of instrument has become essential in different types of industries, such as pharmaceuticals, and they are very useful for any company or business project that requires high degrees of accuracy in mass measurement.
Parts of an Analytical Laboratory Balance
The parts of a precision analytical balance can vary by model and brand, but generally speaking, these are the most common components:
- Glass doors: prevent the entry of drafts
- Measuring plate: it is the place where the mass to be measured is placed.
- Tare button: it is the one that allows you to return the measurement to zero to obtain a more precise result.
- Metal alloy base: It is the support of the balance.
- Feet: it is the base that keeps the balance level.
- Display or screen: there is shown not only the weight, but other readings made by the scale.
- Bubble level: in balances that have this component, you can check if it is actually level.
Do you need an analytical balance for your company and you don’t know how to choose one? Well, here we provide you with all the information available to help you make the best decision.
Types of Analytical Balances
The two main types are Electronic and Mechanical.
Comparison of Analytical Balances in Amazon Online Store
How Does a Precision Analytical Balance Work ?
Unlike a conventional balance, in which only the mass is placed and the measurement is taken, in an electronic analytical balance what is measured is the force that is needed to counteract the mass to be measured.
To achieve this, what is done is to install a force restoration sensor on the balance, which is nothing more than a small electromagnet.
How to Use an Analytical Scale ?
Before measuring it is necessary to make sure that the analytical balance has been calibrated and that it is correctly leveled. The bubble level can help to check the latter and, if it is not level or calibrated, corrections must be made.
The balance must then be connected to a power source. If it is used for the first time, it must be left on for at least four hours to reach the correct temperature to operate. However, the ideal is to check the instruction manual because heating time may vary depending on the model.
Before introducing the mass to be measured, put on gloves and use tweezers. Beyond ensuring the ideal aseptic conditions, this is done because if the hands come into direct contact with the balance, fingerprints can add mass to the measurement.
If the mass is to be measured on a paper or container, you have to put them first, wait for the machine to stabilize and then subtract that measurement from the mass to obtain a more accurate measurement.
Another way to do this is to use the tare button to bring the measurement to zero. Thus, when the sample is placed on the paper or container, the measurement will not be altered.
Once done, add the mass to be measured, close the doors and wait for measurement results. When finished, record the result, extract the sample, close the doors and return the balance to standby mode.
The Best Analytical Balances
There is a wide offer in the market for this equipment, here we show you some models:
Where to Install the Analytical Laboratory Balance ?
As chemical analytical balances have a high level of precision (we saw that air and fingerprints can influence results), it is necessary to find a suitable location for it to function properly.
These are some points to keep in mind when installing an analytical balance:
- Measurement room should not have windows. If it is not possible, then you should have only one, to avoid the influence of drafts and sunlight.
- Location must have only one entrance door.
- It must be a place free from vibrations and movements.
- The humidity should be between 45 and 60%.
- If possible, use fluorescent lamps. Otherwise, other types of bulbs can be used, but in any case they must be far from the table where the balance is located to avoid the influence of thermal radiation on the measurement.
- The table where the scale is to be installed must be rigid and must be installed in the most resistant areas of the building, such as columns or corners. Nor can it be made or have parts of metal, steel, plastic or glass to avoid magnetism and electrostatic charges.
- Avoid placing the balance near air conditioners, computers, or other objects that have a fan.
Cleaning and Maintenance
An analytical laboratory balance is a very practical but also very delicate tool that requires certain minimum care to guarantee its useful life. The main ones are:
- Containers used to hold the mass must be at the same temperature as the measuring room. Also, they should always be dry.
- It is important that the balance is not connected to any power source while we are cleaning it.
- The crystals should be removed slowly. They can be washed in the same way as conventional crystals.
- The measuring plate should be removed and cleaned with a cloth soaked in alcohol. The base of the plate is polished with a brush, preventing the remains of dust or dirt from falling into the balance.
As general maintenance measures, it is important to remember that the balance must always be connected to maintain the thermal balance of its circuits.
At the end of each measurement, it must be put into «standby» mode and, when the time comes to clean it and it must be switched off, it must be put into «warm up» mode to start a new heating phase.
Below are the reference measurements of an analytical balance:
Where to Buy an Analytical Scale at the Best Price ?
As you have seen, an analytical laboratory balance is a very valuable tool due to the very precise results that can be obtained with it.
Now you know what its basic components are, how to use it correctly and what kind of care you should give it to keep it in optimal condition, but where to buy it ?
If you are looking for an analytical balance for your company or project, you may have some doubts about which one may be the best for you. You will certainly want to have the right one at an unbeatable price!
In Amazon there is a wide variety of scales that fit what you need. Among the brands with the best opinions in the market are the Ohaus analytical laboratory balance, the Sartorius analytical balance and the Mettler analytical balance, among others. But how much does an analytical balance cost? It depends on many factors.
The cost of an analytical scale depends on variables such as the brand or model and surely in the Amazon you will be able to find the one you are looking for, do not give it any more laps and take advantage of the wide range of analytical scales!
Drawings of an Analytical Balance
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