Laboratory and precision scales range from a minor division of weight of 0.1mg to 0.001g.
There are numerous different versions of a laboratory scale such as: ‘lab balances’, ‘precision weighing scales’ and ‘analytical scales’ as they are commonly called.
There are different types of weighing devices used:
- Lower accuracy machines are load cell based which makes them more robust and can usually be transported around a site, without loss of accuracy.
- Higher accuracy versions use a weighing method called a ‘force motor’ which produces extremely high accuracy during use.
Due to their construction, these laboratory scales are best sited in one location. They should be used in a draught and vibration free area which is not subject to large temperature fluctuations. This avoids incorrect results.
Lab Scales and Precision Scales are usually supplied with breeze breaks to assist in accurate weighing results. The design varies, depending on the application being used. Industrial plastic housings are common place, as well as steel and stainless steel housings.
Many of our laboratory scales can be main and battery operated, using internal rechargeable batteries. This is extremely useful for portability and can be used without worrying about power socket locations.
There are both trade approved (legal to sell across i.e. charge by weight for an item) versions and non approved scales to consider.
Therefore considerable care needs to be taken when choosing a laboratory scale to ensure that it provides the correct accuracy. The material used in the construction also needs to be resistant to the product being weighed.
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