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.

A Guide to Stirrers, Hot Plates and Stirring Hot Plates

What are the types of stirrers, hot plates and stirring hot plates?

Compact: Small, colorful units fit in any lab.
Multiposition: An illuminating stirrer and a modular unit that offers remote immersible mixing.
Multiposition/Immersible: Immersible units can be placed completely underwater for constant temperature operations. Ideal for use in incubators.
Specialty: These can include modular units for flexibility and remote immersible mixing.
Analog: Operate these manually by turning the dial. They typically are the most economical of all units and ideal for basic stirring and heating.
Digital: Easy to use with the push of a button, digital units can provide greater accuracy and more features. Programmable models can be programmed directly from the front panel to control speed, temperature, and run time.
Large Capacity: Larger than the typical sizes, these units can handle up to 150 liters.
Explosion Proof: Ideal for operation in Class I, Group C and D environments.
Heavy Duty: Made to withstand even the toughest environments.

Need more information?

Read our Selection Guide

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A Guide to Stirrers, Hot Plates and Stirring Hot Plates

What are the types of stirrers, hot plates and stirring hot plates?

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