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.

In the market for a turbine flowmeter? Review the pluses and minuses first

Considering a turbine flowmeter for your application? Turbine flowmeters operate in the oil and gas, and utilities industries and some designs even meet sanitary guidelines. They are used for water consumption, test stands, makeup water, inventory control metering applications, cooling water monitoring, and more in pilot plants and research and development facilities.

Take into consideration the following pluses and minuses when deciding on a turbine flowmeter:

Pluses:

Provides a fast response time—typically a few milliseconds
Offers high accuracy and good repeatability
Selection includes wide flow range options for both liquids and gases
Convenient use with associated digital readout devices including flow control options for both PC and PLC’s

Minuses:

Requires upstream straightener and filter for best results
In pulsating flows, may over-read
Turbine flowmeters for liquids may need regular re-calibration due to bearing wear
Particulates can cause line blockage

Think you need a turbine flowmeter? Review the pluses and minuses before you buy

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