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.

Muffle Furnaces: Save time with reliable equipment that provides results

Laboratory furnaces are ideal for heat treating, reacting studies, sintering processes, and ceramic firing. Our laboratory furnaces feature temperatures up to 1600 degrees Celsius and capacities up to 22 liters.

A muffle furnace is a type of laboratory furnace. Muffle furnaces isolate the samples from the fuel and the combustion to eliminate contamination of the samples. They are durable, reliable, and work well for extensive use. Muffle furnaces are ideal for research and development, materials testing and quality control, heat treatment, ceramics, glass, and so much more.

There are so many muffle furnaces in the market. How do you choose? You want to keep in mind what your application needs and compare it against the following variables:

Operating temperature range
Size of the chamber
Overall dimensions of the furnace
Temperature uniformity
Rise time and at what temperature

The Cole-Parmer StableTemp muffle furnaces reach maximum temperature quickly—rise times as fast as 25 minutes to 1020 degrees. These handy laboratory furnaces are available in three sizes and three controller options to meet your application requirements; basic, set-point, and programmable. All models have an autotuned feature which allows the furnace to perform better at a particular set point and load, eliminating temperature overshoot for a commonly used application. An optional RS-485 communications port is available to let you use these furnaces with your computer.

The fully embedded heating elements maintain temperature uniformity. A door switch cuts power to the heating elements when the door is opened minimizing your exposure to hot temperatures and extending the life of the heating elements. Unique ceramic fiber insulation and double walled construction minimize exterior surface temperatures. The removable hearth plate prevents damage to the furnace from spills. These furnaces have LED displays to simultaneously display actual and set point temperatures.

Basic Control Furnaces feature a single LED display that toggles between actual and set point temperatures.
Single Set Point Control Furnaces have two LED displays to simultaneously display actual and set point temperatures.
Programmable Control Furnaces have two LED displays to simultaneously display actual and set point temperatures.

Do you still need help selecting a muffle furnace to meet your application? Contact our product specialists at 1-800-323-4340.

Laboratory Furnaces: What is a muffle furnace?

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