What is the difference between an analytical balance and a precision balance?

An analytical balance provides readability of 0.1 mg or better, while a precision balance typically reads to 0.001 g or 0.01 g. Analytical balances include draft shields and are designed for highly sensitive measurements. Precision balances handle larger samples and are less affected by environmental conditions.

What readability do I need for my lab application?

You need a readability that is at least one-tenth of your smallest sample weight or required measurement increment. For example, measuring 100 mg samples may require 0.01 mg readability, while gram-level work may only need 0.01 g. Selecting higher readability than necessary increases cost without improving results.

Do lab balances need to be calibrated?

Yes, all lab balances require regular calibration to maintain accuracy. Calibration ensures measurements remain traceable to certified standards. Internal calibration simplifies this process by automating adjustments, while external calibration requires manual verification with certified weights. In regulated environments, calibration records must be documented and retained.

What is the difference between readability and repeatability?

Readability is the smallest increment of weight a balance will display. Repeatability is the degree of agreement between multiple measurements of the same mass, on the same balance, under the same conditions.

What is the best way to clean my balance to ensure accurate readings?

Inspect and clean before each use. A flannel cloth or soft brush works well for dusting and light cleaning. Use a non-abrasive cleaner for light spills, and a dry flannel cloth for glass parts. Set a regular maintenance schedule for deep cleaning to ensure optimal performance and instrument longevity.

Can vibration affect the accuracy of my balance?

Yes — even slight vibration from a heavy footstep can affect accuracy. Place the balance on a sturdy benchtop away from high-traffic areas such as hallways, elevators, stairways, and doors. If that placement is not possible, an anti-vibration table should be considered.

"Baby, it’s Cold Outside” | from Cole-Parmer Blog

If you live in the Eastern or Midwestern United States, there’s no need to guess how cold it is outside this winter ―the new H-B Instrument Enviro-Safe® Nonhazardous Glass Thermometers available from Cole-Parmer will confirm that.

H-B Instrument Enviro-Safe® Thermometer

Cole-Parmer is proud to present these new Earth-friendly “green” thermometers certified as 100% nontoxic, nonhazardous, and biodegradable. These accurate and safe thermometers offer the same accuracy as mercury thermometers without the hazards. They are ideal for use in laboratories, universities, food/beverage, environmental, wastewater, and many other general-purpose applications where the presence of mercury or other hazardous liquids is not desired.

All Enviro-Safe glass thermometers contain an environmentally friendly non-mercury liquid that is 100% certified as nontoxic, nonhazardous, and fully biodegradable. In case of breakage, the liquid can be cleaned up easily with soap and water. These thermometers also have recyclable packaging, an antiroll fitting, individual serial numbers, and a statement of accuracy.

So, what’s so bad about mercury thermometers, anyway?

Mercury thermometers are harmful to both the environment and your personal health. In fact, Mercury is toxic to humans and wildlife. If a mercury thermometer breaks and is not properly disposed of, tiny droplets of mercury can evaporate within the environment over time. When mercury vapor enters the bloodstream through inhalation, brain damage, spinal cord, kidney, and liver damage may occur in time.

Additionally, improperly disposing of mercury from thermometers can contaminate lakes and streams. Mercury may accumulate in the bodies of fish and other wildlife and, through natural processes, converts this mercury into methyl mercury, which is harmful to humans when consumed.

“Baby, it’s Cold Outside”

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