Difference Between Analytical Balance and Triple Beam Balance

What is Analytical balance?

• Analytical balances (also known as chemical balances) are designed to measure mass in the sub-milligram range.
• The measuring pan of an analytical balance (0.1 mg resolution or better) is enclosed in a glass cage with doors to prevent dust accumulation and to prevent air currents from affecting the functioning of the balance.
• This enclosure is commonly referred to as a draught shield. The employment of a mechanically ventilated balance safety enclosure with specially designed acrylic airfoils permits a turbulence-free airflow that prevents balance variations and the measurement of masses as low as 1 g without fluctuations or product loss.
• In addition, the sample must be at room temperature in order to prevent natural convection from producing air currents within the enclosure and causing a reading inaccuracy.
• A single pan mechanical substitution balance is a technique for keeping a constant reaction throughout the balance’s useful capacity.
• This is accomplished by maintaining a consistent load on the balancing beam and, consequently, the fulcrum by subtracting mass from the same side of the beam as the sample is added.
• Instead of employing actual masses, electronic analytical scales assess the force required to oppose the mass being measured. Consequently, they require calibration changes to account for gravitational variances caused by varying locations and altitudes.
• They generate a force to counter the sample being measured using an electromagnet and output the result by measuring the power (and resulting force) required to achieve equilibrium. This type of measuring instrument is known as an electromagnetic force restoration sensor.
• Electronic analytical balances, single-disk analytical balances, and electro-optical analytical balances are the three primary types of analytical balances.
• Analytical electronic balances are a popular instrument found in chemical laboratories.

What is Triple beam balance?

• The triple beam balance is a tool for precisely measuring mass.
• Typically, such instruments have a reading inaccuracy of 0.05 grammes. Its name alludes to the fact that it has three beams, with the middle beam being the largest, the far beam being of medium size, and the front beam being the smallest.
• The disparity in size between the beams reflects the disparity in weights and scale readings that each beam measures.
• The reading scale of the centre beam typically reads in 100 gramme increments, that of the distant beam in 10 gramme increments, and that of the front beam between 0 and 10 grammes.
• The triple beam balance can be used to directly measure mass from objects, calculate liquid mass by difference, and measure chemicals.
• The triple beam balance is used to precisely measure masses, with a reading error of 0.05 grammes.
• Move the three sliders on the three beams to the leftmost places, such that the balance reads 0, with the pan empty. If the indicator on the far right is not aligned with the fixed point, calibrate the balance by twisting the set screw under the pan on the left.
• After calibrating the balance, place the object to be measured on the pan.
• Slide the 100 gramme indication to the right along the beam until the indicator falls below the set mark. Immediately to the left of this point is a notched location that represents the amount of hundreds of grammes.
• Now drag the 10-gram indicator to the right along the beam until the indicator falls below the fixed threshold. The notched position to this point’s immediate left specifies the number of tens of grammes.
• The front beam is not notched, thus the slider can go wherever along it. The numbers in boldface on this beam represent grammes, while the tick marks between the boldface numbers represent tenths of grammes.
• To determine the object’s mass, simply add the numbers from the three beams.
• As with a ruler, the front scale can be read to the nearest half tick point.

Difference Between Analytical Balance Vs Triple Beam Balance