The process of measuring the size of weight or force dates back as far as 3500 BC where the Ancient Egyptians civilization adapted a tool called “The Equal Arm Balance”.

Over the years, force and weight measurement has evolved to become part and parcel of domestic, commercial and industrial applications and other fields of applications with the invention of various modern force and weight measurement instruments by different Original Equipment Manufacturers (OEMs).

There have been improvements in the precision of these instruments and many job roles have been created. This article contains several resource guides of different categories and you will find the necessary information about various force and measurement instruments and their general applications, OEMs, Certification standards and markings, career openings and more.

FORCE AND WEIGHT MEASUREMENT – INSTRUMENTS

These are instruments that are used to create measurement solutions for various fields of applications. Each of the instruments has diverse applications possibilities and some are also designed for specific applications. The following are the basic force and weight measurement instruments which for the basis of load cells, torque transducers, scales and others;

This section of the guide shows below the various certification standards and markings.

  • ISO: ISO stands for the International Organization for Standardization. It develops and publish international standards. It should be noted that ISO does not provide certification or conformity assessment for products and instruments. Some of the popular ISO standards are ISO 9001 Quality management, ISO 14001 Environmental management and ISO/IEC 27001 Information security management. Use this resource to navigate information about other popular standards that relate to force and measuring instruments.
  • RoHS: RoHS stands for Restriction of Hazardous Substances. The RoHS restricts the use of hazardous materials found in electrical and electronic products. All applicable electrical or electronic products, equipment, sub-assemblies, cables, components, or spare parts in the European Union market must pass RoHS compliance. The RoHS specifies maximum levels for some restricted substances such as Lead, Mercury, Cadmium, Hexavalent Chromium and many more. Follow this resource to see the various RoHS steps to certification, RoHS product categories and restricted substances.
  • CE: These letters CE are the abbreviation of the French phrase “Conformité Européene” which means “European Conformity” in English. This marking shows that the product complies with the requirements of the relevant European health, safety and environmental protection legislation. Discover the importance of a CE marking, the general principles of the CE marking, what products need CE marking, how to obtain the CE marking and many more.
  • NTEP: NTEP is the abbreviation for National Type Evaluation Program and it requires various original equipment manufacturers and industries to submit their prototype weighing devices for evaluation so as to if it meets the uncertainties that are related to tolerances associated with the intended final use in the marketplace. Learn more about the NTEP program by using this resource.
  • OIML: It stands for International organization of Legal metrology. Legal metrology can be defined as the application of legal requirements to measurements and measuring instruments, hence the basic role of the OIML is to create global standards for use in legal metrology legislation. Discover the mission of OIML, the issues of OIML, the various international systems, the new OIML certification systems, emerging metrology systems and many more through this resource.

It should be noted that there are other certification bodies that approves the use and sales of force and weight measurement instruments.

Examples of the ones not mentioned above are American National Standards Institute (ANSI), American Association for Laboratory Accreditation (A2LA), National Supervision and Inspection Center for Explosion Protection and Safety of Instrumentation (NEPSI), International Aerospace Quality Group (IAQG), Underwriters Laboratories (UL), Canadian Standards Association (CSA) and many more.

Most standards are based on the country where the product is to be used while some standard bodies have global reach of influence on different products.

FORCE AND WEIGHT MEASUREMENT - STUDY GUIDES

This section of the resource guide shows the various study guides that can help in learning more about force and weight measurement. It includes published articles, blogs, journals and books on various topics under force and weight measurement.

BLOG ARTICLES

  • What is the history of weighing? National physical laboratory (NPL) published this article and it gives a quick run through on the history of weighing. It discusses topics such as weighing, the birth of the metric system and the kilogram and the unit of mass in SI system.
  • How Many Different Types Of Force Transducer Are There? This is another article published by the National Physical Laboratory (NPL). It shows the types of force transducer used in designing various force measurement systems. This resource is useful to understanding the basic operation of the transducer you wish to use for your application and also the operating characteristics.
  • What Is The General Principle Of A Force Transducer? This article by NPL defines what a force transducer is and the various materials used as its underlying mechanism. It goes further to explain how a force transducer operates and the most common commercially available type of force transducer. Use this resource to learn more about the general principle of a force transducer.
  • Essential Guide To Load Cells: This is an article published by ourselves, Tacuna Systems, it shows reveals a lot about load cells under topics such as history of load cells, how load cells work, types of load cells, materials used in commercial load cells, uses of load cells, what is a strain gauge load cell, what is a tension load cell, how often should load cells be calibrated, famous load cell manufacturers, average cost of a load cell and the future of load cells.
  • Weights and Measurement: Weights and measurements are very vital information that enables us to quantify many things in life ranging from mass and length to area and volume. This article shows the various units of measurement, hence use this to learn more about the weights and measurements and their conversions.

JOURNAL ARTICLES AND BOOKS

  • Instrumentation Measurement And Analysis: The authors of this book are B.C Nakra and K.K Chaudhry. This book encompasses and presents in a lucid format, the three main features of instrumentation which are Instrumentation principles, measurement techniques and data analysis. The book was written from a wide and long-standing experience of teaching and research in the field of instrumentation. Use this resource to read more about these three features
  • An Introduction to Stress Analysis and Transducer Design using Strain Gauges: This a definitive work on strain gauge measurement written by Karl Hoffman. This book introduces the different types of strain gauges that exist with their operating principles, how this device can be included in a measurement system to obtain a precise result, the various terminologies associated with strain gauges, the selection criteria, various calibrating equipment and how to reduce or eliminate force measurement errors.
  • The Instrumentation Reference Book: The reference is for people to refer to for the various information they need to know about instrumentation. The major part of this book is a technical introduction to so many facets of instrumentation; it also has a commercial part where manufacturers and so on are listed. The book was edited by Walts Boyes and it covers a broader view on measurement generally, however it contains vital information on measurement of force. Find the various topics discussed on measurement of force using this resource.
  • Guide to the measurement of force: This guide aims to provide information a user wishing to measure force or weight. It will help you to understand the range of measurement techniques available, to understand the requirements of the application, as well as to be able to communicate those needs to the manufacturers and suppliers of the force measurement instrument. Use this resource to learn more about the methods of calibrating, operating and maintaining force measurement systems.
  • Force Measurement: Find through this resource, a short historical background on force measurement, the description of both the analogue and digital strain gauge load cell used for force/weight measurement and the factors that may influence the choice between a digital load cell and an analogue load for a specific weighing application.
  • Bridge Measuring Circuits In The Strain Gauge Sensor Configuration: This article is written by Jelena Manojlovi? and Predrag Jankovi?. The aim of the paper is “to present the strain gauge conjunction with various measuring circuits, especially in Wheatstone bridge configuration.” It defines concepts that you will find interesting, such concepts are; stress and strain definition, the types of bridges used for strain measurements, how to connect these bridges, it defined what a Gauge factor is and even discussed a sample model to show how tensile forces affects the resistance of strain gauges.

CAREERS IN FORCE AND WEIGHT MEASUREMENTS

The advances in modern day technology have led to improvements in the design and precision of force and weight instruments. This has led to the creation of various job roles and employments as highly trained personnel and staff is needed to push the market for this weighing instruments. The following are few of the various job openings available in the force and weight measurement industry.

  • Electrical Engineer
  • Product Quality Engineer
  • Senior Support Engineer
  • Sales Representative
  • Sales Engineer
  • Calibration Technician
  • Machine Operator
  • Production Assembler
  • Product Manager Etc.

As it can be seen, basically the force and weight measurement industry offers career prospects for fields such as Engineering, Sales and Manufacturing.

A few job search websites that provide job listings in the electronic engineering industry:

Electronics Engineer VelvetJobs IEEE JobSite

FORCE AND WEIGHT MEASUREMENT – ORIGINAL EQUIPMENT MANUFACTURERS (OEMs)

This section provides the links to some of the world’s top original equipment manufacturers of force and weight measuring instruments and tools. Through the resources available in this section you will be able to pick which of the equipment manufacturers produces the right instrument that meets your desired application.

They are:

  • Tacuna Systems: We specialize in tools for sensing, data acquisition and controls and deliver exceptional support from answering application engineering questions. Our portfolio of products includes amplifiers and Conditioners, calibration weights, load cell accessories, load cell calibration services, load cells, readout and load cell indicators, scales and accessories, strain gauges, summing junctions, weigh module and mount weighing readout pointers. Use us as a resource to navigate the details & specifications of these products.
  • AmCells: This company manufactures and supplies standard load cells that have capacities ranging from fractions of a pound to excess of several hundred thousand pounds. Through innovative engineering concepts coupled with proven manufacturing and instrumentation results in custom designed load cells that fit to match the desired customer needs. Get more information about the various products offered by AmCells.
  • LW Measurement LLC: This is a force and weight measurement Solutions Company located in Rohnert Park, California. The company holds several design patents on their LFS and MediCan Scales; also it holds software patents on their AnyCal software. The products offered by this company include various types of scales, tree scales and load cells. Navigate this resource for more inquiries about their services.
  • Anyload: This is a U.S. integrated design and manufacturing company that specializes in the development and production of force measurement solutions for static and dynamic forces. Their list of products includes load cells, weigh modules, amplifiers, junction boxes, hardware and accessories, scales and many more.
  • OMEGA Engineering: OMEGA Engineering is known for delivering quality instrumentation and exceptional customer service. The company’s priority lies in providing precision manufacturing, design and custom engineering, calibration and quality assurance. Explore the various product groups that OMEGA Engineering offers for process measurement and control.
  • VPG Transducers: This is a Force Sensors Product Groups of the Vishay Precision Group Company. It includes brand products such as Tedea-Huntleigh, Sensortronics, Revere and Celtron. They all provide weighing and force measurement products by using the most advanced strain gauge technology available. Its product portfolio includes Strain Gauge Load Cells, Weigh Modules, Electronics, Bonding Services, Custom Solutions and Force Sensors.