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.

Controlling Bath Fluid Temperatures

TOPICS:bath accessories bath fluid

hollow polypropylene pp ball bath covers

Posted By: Cole-Parmer Blog Team October 16, 2014

To maintain a constant temperature of from -50°C to 280°C in your bath, use bath fluid to match your application. Select from the following options:

Bath Fluid	Temperature Range	Specific Gravity
Dynalene^® HC-50 fluid	-50 to 58°C	0.85
Silicone 210 fluid	-65 and 280°C	0.98
Silicone 200 20 (hot) bath fluid	10 and 149°C	0.95
Silicone 710 (hot) bath fluid	150 and 250°C	1.11

To reduce significant vapor loss and provide insulation, use hollow ball bath covers. These ball covers are made of HDPE and form a tight cover over your fluid. Hollow bath balls can reduce heat exchange by more than 75%.

To hold your sample in place, check out holders and tube racks which protect bath fluid.

See our full line of bath and circulator accessories.

Controlling Bath Fluid Temperatures

Be the first to comment on "Controlling Bath Fluid Temperatures"

Leave a comment Cancel reply