Located in nearly every laboratory, high precision balances perform a critical role. They are designed to handle a wide variety of materials for many applications, from research and development, production and quality control to educational institutions. High precision balances are often used for weighing chemicals, powders, larger objects and containers.
Several factors can contribute to the measurement accuracy of an analytical or precision balance, including temperature, environmental conditions and the use of proper procedures. The most significant factor, however, is the accuracy level required for your application. Evaluate the level of accuracy and precision needed for your specific weighing task to choose the best type of balance.
Analytical and precision balances feature a range of capacity sizes, from less than 150 grams up to over 10 kilograms. They also come with various pan sizes, from small to extra large. The higher capacities and sensitivity of an analytical balance make them better suited for high-precision weighing, while precision balances are a great choice for applications in less protected environments and with less critical measurements.
When evaluating the sensitivity and accuracy of a high precision balance, look at its linearity and repeatability. Linearity is determined by weighing successively heavier and lighter calibration masses on the scale and plotting the results on a graph. The lower the deviation of the lines connecting these points, the better the linearity. Repeatability is tested by weighing the same sample multiple times and comparing the results to find the average mass. The more consistent the results are, the greater the repeatability and the better the precision. high precision balance