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.

Chemical Hose that Meets the Challenge

With broad chemical resistance, chemical hose is used to transfer chemical compounds. With many types to choose from, here is an overview of some common hose options and the applications to use them for:

General purpose hose when transferring oil is not a significant factor
Multipurpose hose for petroleum oils, gasoline, kerosene, fuel oil, lubricating oils, air, and water
PVC and Industrial PVC hose for basic vacuum or transfer and high flow rate applications
Smooth PTFE-lined PTFE hose for sanitary or steam transfer, bottle filling, gas analysis, hydraulic lines, extrusion presses, molding and adhesives
Smooth FEP-lined PTFE or rubber hose for bulk transfer, chemical trailer loading, portable pumps, isolation dampeners, food & beverage, flavors, load cell applicators, caustic cleaning, CIP
Convoluted FEP-lined hose for chemical, steam, solvent, food & beverage, acid lines, CIP lines
Rubber-covered Chemfluor^® hose for pharmaceutical, chemical, food and beverage handling
Platinum-cured SS wire-reinforced silicone hose for demanding sanitary high pressure and high vacuum, pharmaceutical, food and beverage, and cosmetic applications
Polypropylene-braided convoluted Chemfluor PTFE hose for chemical and industrial uses; tightly woven braid reinforcement resists abrasion better than stainless steel reinforcements

Chemical Hose that Meets the Challenge

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