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.

Which Chamber is Best for Your Lab? (Part 2: Glove Boxes)

This is part two in a four-part series.

From glove boxes to incubators to environmental chambers, how do lab users decide which equipment they need? While some overlap in capabilities exists, each of these chambers offers distinct uses.

Glove boxes enable the manipulation of materials within a sealed, transparent environment. Typically used for chemical synthesis, pharmaceutical applications, laser welding, and specialty chemicals, glove boxes are highly versatile. With their unique design, they prevent contact between users and potentially hazardous materials. The isolator chamber of the box contains slots with gloves that are sealed airtight. The glove slots allow users to handle items inside the chamber.

Substances that work well in the isolated environment of the glove box are radioactive isotopes, viruses, DNA, and toxic chemicals. In addition to offering containment, glove boxes can control environmental parameters such as temperature, moisture, oxygen, and more. Two types of glove boxes are:

Glove boxes for use with hazardous materials include HEPA and organic vapor filter safety valves to protect users from particulates and harmful vapors.
Glove boxes that provide a high-purity inert atmosphere.

Gloves are available in rubber, neoprene, or nitrile or may be treated for handling hazardous substances.

Read our next blog to learn more about incubators. View our selection of glove boxes.

Which Chamber is Best for Your Lab? (Part 2: Glove Boxes)

Be the first to comment on "Which Chamber is Best for Your Lab? (Part 2: Glove Boxes)"

Leave a comment Cancel reply