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.

September is Healthy Aging Month

TOPICS:healthy aging walking pedometer wrist blood pressure monitor

Posted By: Cole-Parmer Blog Team September 6, 2012

Aging doesn’t have to be negative, it can be positive. A chance to create new habits or follow-through on neglected ones. According to healthyaging.net, the “back-to-school” season is a great time to rejuvenate physically, socially, financially, and mentally. The editors of Healthy Aging Magazine offer 10 Tips for Re-Inventing Yourself.

Exercise and health may be at the top of the list. The Walking Pedometer records walking distance based on stride lengths. The internally tuned pendulum recognizes movement and records distance traveled. It can easily attach to clothing with its spring belt clip. The Wrist Blood Pressure Monitor from Cole-Parmer is lightweight with a single button display that auto-inflates at the wrist to quickly show systolic, diastolic, and pulse readings. It stores and recalls up to seven measurements to track blood pressure.

September is Healthy Aging Month

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