About seca

The secret of the seca scales success lies, right from the start, in the durable high quality and precision of the products. As early as the first half of the 20th century, practically every doctor knew and used the mechanical scales with the red stroke. Incidentally, the name seca has been protected since 1897! The great success of electronics over the past 30 years has enriched and shaped the seca product range.

America's Best Hospitals Choose seca seca has made a name for itself primarily through pioneering work in the technical field and practice-oriented functions. The company's professionalism is also recognised by the authorities - seca is allowed to calibrate its own scales.

seca supports national and international research and field studies. Specialists around the world have been relying on seca scales and measuring instruments when the quick and accurate determination of body size and weight is required.


Mechanical, electromechanical and electronic scales

The first scales that carried the seca logo were mechanical models. Scales are still found today in the range of products that evoke memories of the classic scales, which are of course much improved. In the course of further technical development, electromechanical scales came more into use. With these products, the weight is determined mechanically, but displayed digitally. Today, electronic scales ensure precise measurement results. Practical equipment and auxiliary functions round out weighing technology.

How does a mechanical scale work?

A mechanical flat scale works as follows. The weight acting upon the platform of the scale is transferred to a load lever system. The system reduces the weight acting upon the platform to the measuring equipment by a fixed transformation ratio. A weight that presses on the platform with 100 kg, for example, is reduced to 10 kg. In other words, the transformation ratio is 10:1. The load lever system is connected to the pointer by a pinion, so that the weight is displayed directly and without delay on the round dial scale. With mechanical baby scales, free-moving weights are pushed onto a bar until balance is achieved and the result can be read.


How does an electronic scale work?

Electronic scales use various technologies to determine weight. seca uses the patented tuning fork sensor technology amongst others. This technology ensures not only accurate results, but also reduces energy consumption compared to conventional digital measurement methods by a thousand fold. The result is easily read from the digital display. The energy source is most often a battery. There are also models with a mains plug. It is important that the scale has an energy-saving automatic shutoff. Some electronic scales can display more than weight. For example, they automatically calculate the BMI value if the body size is entered in advance.


This is how measuring technique works with tuning fork sensor technology

The pitch of a violin string depends on the force that is used to clamp it. Following this principle, seca uses two opposing tuning forks connected at their ends on which a crystal has been soldered. Both crystals are operated in such a way by a suitable electronic circuit that the tuning forks continually swing. And with a pitch that depends on the force at which the ends of the sensors are pulled. The person being weighed causes the "pull".


seca scales are relied upon by the most prestigious hospitals in the country, including Cedars-Sinai in Los Angeles, Johns Hopkins in Baltimore, and the Mayo Clinic in Rochester, Minnesota.  

Leading research institutes such as the Harvard School of Public Health and Georgetown University also depend upon seca's established precision and quality. In spring 2007, seca products were also be featured in The Learning Channel series, "Honey, We're Killing the Kids" which dealt with the growing childhood obesity epidemic.


seca was established in North America in the mid-1980's largely to service the World Health Organization.  In the early 90's the primary focus shifted to servicing the U.S. medical community with our weighing and measuring devices.

What is seca's relationship with the WHO?

seca began working with the World Health Organization in the mid-1980's when they were asked to create a scale specifically designed to support their survey work in the most remote parts of the world. 


An electronic scale measures the force with which a person is pulled by the earth. This force depends on location. It gets smaller and smaller the further the scale is from the centre of the earth. Therefore, a scale must be correctly adjusted for its location of use. Otherwise, a person who weights 80 kg at the North Pole would weight only about 79.1 kg on Kilimanjaro. Scales not adjusted for this difference in the earth's gravitational pull cannot be used in medicine, since every gramme nearly always counts in medicine. Before a seca scale is delivered, it is precisely set for it future location of use.


What is the difference between a personal scale from the supermarket and a seca scale? Both, for example, have the same number scale with a 1 kg gradation. The difference is that the seca scale displays the exact weight it measures. The scale from the supermarket shows the weight which only loosely corresponds to the actual weight. The supermarket scale is not very accurate. By the way, that applies to both mechanical and electronic scales.


Definition of accuracy acc. to DIN EN 60051

The accuracy of a scale is the degree of agreement between the displayed and correct value. It is determined by the intrinsic error limits and influencing effect limits. In other words, accuracy depends on the quality of the components, the quality of the load cell and environmental conditions. An environmental condition that affects accuracy can be the temperature or humidity. Under error limits for calibrated scales is understood the permissible tolerance, i.e. the permitted weight deviation by plus and minus. They are load sensitive and defined in the calibration regulations.

Definition of gradation

Gradation is the smallest possible readable distance between to weight values. For digital scales, it is identical to readability. For mechanical scales, it is the smallest weight value on a scale consisting of dividing lines and numbers that are read with a pointer or index.


The bed and dialysis scales from seca with their alarm function can assist critical monitoring. For example, in the case of clinical procedures involving the loss of fluid or special fluid turnover, or simply in areas where patients can only be weighed in bed.


Obesity is considered to be the fastest growing health risk in the world. It is therefore all the more important to determine the exact nutritional condition of a patient using the Body Mass Index (BMI) - one of the few internationally acknowledged values when it is a question of obtaining a meaningful weight-height ratio.

seca 360° wireless

Save time in measuring and analysis.

Work more quickly and more precisely - the wireless transmission of data to PCs or printer saves a lot of time in routine medical work âand prepares hospitals and doctors' offices for the future. The new seca 360° wireless network will be able to store all height and weight measurements in a seca database, feed the data directly into an EMR system and provide PDFs of additional analyses made by the seca software. Complete measuring stations like the seca 285 offer still another time-saver that should not be underestimated - that is, obtaining weight, height and BMI in a single step.

Prevent erroneous measurements.

Weighing and measuring involves much more than just operating some devices. Quite often you have to do two things at once – take care of a possibly unstable patient and write down all the measurements. In this challenging situation errors are often made in handwritten notes. But not with seca 360° wireless. The seca devices send their data directly to a seca 360° wireless printer or to the seca 360° wireless USB adapter on your PC and also eliminate the detour over mountains of paper.

Improve the quality of your examinations.

seca 360° wireless not only makes your life easier, but also gets more out of your data by letting you conduct extensive analyses with the software seca analytics 105 on your PC. Three modules stand ready to assist you: Energy, Cardiometabolic Risk and Development/Growth. With this diagnostic assistance, you can compare your patient's measurements with standard values, visualize development trends and generally improve the quality of your examinations.

Advise your patients at a new level of quality.

Up till now advice from a doctor was mostly verbal. Thanks to seca analytics 105, doctor's advice can be visual too. Show your patient their energy level and cardiometabolic risk in black and white. Or use percentiles to depict the short-term and long-term changes in the height and weight of children and juveniles. Particularly in growth development questions, this function is not to be underestimated. It provides a clear and easily understood service, appreciated by everyone seated in your waiting room.

Small, medium or large? seca 360° wireless offers solutions of every size.

With the seca 360° wireless, you can benefit from a wireless network in three different versions:

  1. Small network: The seca 360° wireless products transmit their data directly to a seca 360° wireless printer.
  2. Medium network: Equipped with the seca 360° wireless USB adapter, your PC receives all measurements directly from the wireless network so that you can analyze them with the software seca analytics 105.
Large network: Several seca 360° wireless products and computer form a room-spanning network. If an Electronic Medical Record (EMR) system is available, the seca 360° wireless network can gain access in order to transmit height and weight directly to it and to generate other analyses in the form of a PDF.

Click here to see the extensive seca product range