No laboratory is complete without scales. The work that happens in laboratories involves precision and can provide you with accurate weight measurements. But every laboratory's needs vary by industry, and the wide variety of laboratory scales reflects these differences. Today we'll look at some of the most common types of laboratory scales, both electronic and manual.
Throughout history, balance sheets have taken many different forms. Here are some common types.
SEMI-MICRO, MICRO AND ULTRA MICRO SCALES
For weighing small quantities, ultramicro- and microbalances are chosen. Typically, these scales have a maximum load capacity of 3 to 10 grams with an accuracy of 0,1 micrograms or 0,00001 g. Typically, these types of scales consist of two components, one containing the electronics and the other containing the measuring cell. This will limit the interaction and influence of electronics on sample weighing. Applications in which these types of scales are used range from solids/filter weighing, pipette calibration, drying, ashing, coating measurement.
ANALYTICAL SCALES
In many ways, analytical balances are the gold standard and the most common among laboratory balances. This is because they offer uncompromising sensitivity. Their capacity can be as small as 1 gram and usually does not exceed several kilograms. For this reason, they are most suitable for weighing small quantities.
Analytical balances are so precise that their measuring cup is usually closed. This is to ensure that dust and other environmental factors such as wind do not interfere with your measurements.
TOP LOADING AND PRECISION BALANCE
At first glance, top-loading balances resemble analytical balances and they operate in the same way. But they have completely different practical applications. Typical top loading scales have a maximum capacity of 150 grams to 10 kilograms. They cannot measure objects of extremely low mass, such as laboratory balances, nor are they as accurate.
However, what top loading scales lack in accuracy, they make up for in speed. They are completely digital and can give readings in seconds.
THREE BEAM SCALES
It's hard to get through basic training without using three-beam balance. They have been a hallmark of school laboratories for many years because they are easy to use, cheap and durable.
Triple beam scales are so named because they include three "decades" of weights that typically measure mass in hundreds of grams, tens of grams, and single grams. Start with the heaviest decade and work your way down until the object you hope to weigh is balanced. Then add the numbers in decades to get the mass.
HISTORY OF EQUAL HANDS BALANCES
The equal-arm scale has its roots in ancient Egypt. This is probably the oldest type of scale, but it is still relevant today. At its most basic level, an equal-hand balance consists of two bowls suspended on opposite sides of a lever.
To use this type of scale, place the item you want to weigh on one of the pans. Then place objects of known weight, such as calibration weights, on the other. When the two pans are balanced as much as possible, the weight of the unknown object is equal to the sum of the calibration weights.
Evil, like bookmakers, like cryptocurrency exchanges, like drugs, like quick money. Of course, all this is evil and...