Campbellfield, VIC, Australia, May-31-2017 — /EPR TRANSPORTATION & LOGISTICS NEWS/ — We rely on weighing instruments every day. In our bathrooms and kitchens, in a crowded lift, at the supermarket checkout and at the airport check-in, there are a myriad places where weighing instruments play a key role in our daily lives.
We assume that the huge truck carrying a load of sand has been declared safe and within legal load limits before it hits the highway. As consumers, we rely on the accuracy of weights on any packaged items that we buy, and businesses that produce or distribute products depend on their weighing systems to be reliable and precise.
We probably take weighing instruments for granted – but has anyone taken the time to discover how they work?
Interestingly, the same highly accurate devices are found in the humble bathroom scale as in the highly sophisticated and sensitive weighing systems used in a diversity of industries from pharmaceutical operations to diamond mines. Load cells.
What is a load cell?
In simple terms, a load cell is a transducer which measures weight by converting the force or weight on it into a measurable signal. This signal generally only measures a couple of millivolts and needs to be amplified into a usable format – either analogue or digital. The outputs are proportional to the force or weight applied to the load cells.
There are many different types of load cells which use different operating principles to obtain weight readings including hydraulic load cells, pneumatic load cells and strain gauge load cells. Some are based on fluid pressure, others on elasticity whilst others are based on magnetostriction (otherwise referred to as piezoelectric effect) – and they have all been developed specifically to meet the needs of different applications.
With all the advances in modern electronics, the majority of load cells today are electronic, but non-electric hydraulic and pneumatic load cells are also widely used . The most important aspect of choosing a load cell however, is not whether or not it is electric, but rather whether it is the right design and type for that particular application – and it’s always advisable to consult an experienced supplier so you get an informed recommendation.
Load cells can be categorised loosely into two main areas, tension and compression load cells. A tension cell measures the weight pulling on it whilst a compression cell measures the weight pushing on it – and very often, these two types are used alongside each other in the same application to achieve optimum accuracy.
Why do we use load cells for weight measurement?
Load cells are used across a diversity of weighing applications because they are:
- Highly accurate
- Fast and efficient
- able to withstand repeated use and extreme conditions
- Virtually impervious to temperature changes so their measurements remain reliable and precise
- Cost-effective and if serviced and maintained appropriately, will last a long time
Because load cells enable objects and materials to be weighed quickly and easily, it can translate into bottom-line savings. And with the business landscape becoming increasingly competitive and demanding and the regulatory framework more rigorous than ever, operators have to be able to rely on the accuracy and reliability of their weighing systems.
That’s why the choice of load cell is so important. With so many different types available, plus other factors such as fitting, commissioning, ongoing maintenance and calibration to take into consideration, it can be quite a challenge identifying the perfect fit for your weighing needs.
Don’t take a chance, because your choice of load cell is critical. Rather talk to the experts in weighing technology, UltraHawke, and use their experience and expertise to identify your optimum weighing solution. They are an acknowledged market leader in the manufacture and supply of all types of weighing instruments, and they will work out an affordable, efficient and reliable solution that’s specific to your needs. Call them on 03 9357 7470 or visit www.ultrahawke.com.au to see their extensive range of weighbridges, weighbridges for sale, in-motion weighbridges and truck scales.