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.

5 Tips for Taking Turbidity Measurements

Turbidity meters and turbidity testing products help assess water quality by measuring the cloudiness of a fluid that contains very small particles such as deposits, pollution, and other elements.

When using a turbidity meter, prevent erroneous measurements resulting from inaccurate readings by:

Oakton® T-100 Turbidity Meter (Handheld, Waterproof, with Standards)

Calibrating your turbidity meter with the appropriate calibration standard in each measuring range for the highest accuracy
Avoiding samples containing air bubbles, coarse debris, or floating sediments
Always using clean vials (etched, scratched, or dirty sample vials scatter light and provide inaccurate readings) with a protective case or extra long tubes to allow for handling outside the measuring area
Wearing gloves to prevent smudges or fingerprints on vial surface
Taking readings on smooth, sturdy surfaces—vibration can cause errors in your measurements

View our selection of turbidity meters and turbidity testing products.

5 Tips for Taking Turbidity Measurements

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