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.

Safety Shields: Remain Splash-Free

Working in a lab with biohazards, chemicals, or other potentially dangerous substances? Protect yourself from splashes and flying debris with splash shields and safety shields. Some shields even protect you from beta radiation.

Cole-Parmer® Benchtop Splash-Guard

Because shields are crafted of clear materials, such as Plexiglas^® acrylic, and polycarbonate, they do not limit your vision or prevent you from accessing the bench. Most shields adjust to provide the flexibility you need for a variety of projects.

Shield options include freestanding, magnetically clamped, and adjustable neck clamp versions. For greater stability, look for weighted shields with a solid base to hold the shield in place.

Twin bracket clamp models provide the strength and stability to hold larger and heavier shields without compromising adjustability.

When selecting a shield, make sure that it is designed to protect you from the type of hazard you will encounter, such as biohazards and beta radiation.

See our full selection of safety shields.

Safety Shields: Remain Splash-Free Using Shields and Other Safety Devices

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