Wipotec Weigh Cells measure weights in micrograms and milligrams – or even larger weights from 50 kg to 120 kg. They are installed in a wide range of scales.

• Strain gauge load cells use a strain gauge attached to a spring body for measurement.
• EMFR Weigh Cells use the principle of electro-magnetic force restoration (EMFR) and are therefore particularly fast and extremely accurate.

A Wipotec Weigh Cell module measures weights and forces – it reacts to pressure or tension from micrograms up to 120 kilograms. To do so, it uses the principle of electro-magnetic force restoration (EMFR). This is why a Wipotec Weigh Cell works quickly and precisely.

An EMFR Weigh Cell uses the principle of electro-magnetic force restoration (EMFR). In its functionality, it is similar to a simple beam balance. If a weight is placed on one side of the beam, a coil attached to the opposite side of the weighing beam attempts to move out of the magnet’s magnetic field. This deviation is detected by a photoelectric beam (zero indicator). Following this, exactly enough current is sent through to the coil to ensure that it is balanced. As the current is proportional to the weight and is measured via a resistor, it can be converted into a digital signal and further processed.

Weigh Cells are indispensable in almost all industries: SG load cells, which work using a strain gauge, are often used to measure weights once.

However, as soon as the weighing process is dynamic and fast, Weigh Cells that work according to the principle of electro-magnetic force restoration (EMFR) are the solution: These models can process the lowest weights at the highest production speeds. Such processes exist in the food industry, in the production of electronic components or in the pharmaceutical industry, for example. These products are also used in aerospace technology.

Weigh Cells are available in many different designs – always matching the type of scale, such as platform scales, floor scales, bench scales, static scales, checkweighers or catchweighers. The most important parameter for the development of custom-fit modules is firstly measuring accuracy. However, the measuring speed, the height of the weights and the type of measurement (tension, compression, dynamic or static) also play an important role.

Digital Weigh Cells are a special type that process and evaluate weights digitally. These special modules are available in two designs:

• In strain gauge scales, the geometry of a spring element changes under load. This elastic deformation is recorded by a strain gauge (SG) and converted into an electrical signal.
• EMFR scales function like a mechanical beam balance whose deflection is compensated electrodynamically with the aid of a magnetic coil. Digital Weigh Cells from Wipotec operate using the principle of electro-magnetic force restoration (EMFR) – in the weight range between 1 microgram and 120 kilograms.

Such a module is at the heart of every precision scale: It measures the weights placed on or attached to these scales extremely accurately.

As the name suggests. platform Weigh Cells are mostly used in platform scales. Such special scales are important for dynamic filling, packaging and weighing processes in the food and pharmaceutical industries. In these high-speed production lines, in addition to speed, maximum robustness and easy cleaning are particularly important. This is precisely what Wipotec Weigh Cells offer.