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Your Quick Guide to Buying Medical Scales!
February 06, 2018
Your Quick Guide to Buying Medical Scales!
Your Quick Guide to Buying Medical Scales!

Ok, so you need to buy a medical scale...what type of scale should you buy? How do you make sure you can legally use it? What does Class III Approved mean? And what are M stickers and CE marks anyway? ...Confused? Hopefully not by the end of this guide...

What's it all about?

The importance of accurate medical weighing cannot be underestimated. Stories in the press over the past few years have highlighted cases of people becoming ill after their prescriptions were calculated from non-approved and inaccurate scales, even though, by law, all scales used for professional medical use must be Class III approved.

Where non-Class III scales are being used it is often due to misinformed purchasing departments or doctors being simply unaware that the scales they are using are not suitable for their needs. It is vitally important that consumers are aware of the legal requirements that are in place to ensure medical weighing is regulated and accurate. This guide will aim to explain these regulations and highlight your obligations as a medical scale purchaser.

The NAWI Directive

One of the key documents in the regulation of medical scales is the Non-Automatic Weighing Instruments Directive (or NAWI for short). This important document defines the legal requirements for weighing scales that are to be used in the EU. Since January 1st 2003*, the NAWI Directive has applied to all scales used for the following purpose**:

"Determination of mass in the practice of medicine for weighing patients for the purpose of monitoring, diagnosis and medical treatment."

(From this definition, scales used in, for example, slimming classes or fitness centres do not have to conform to the NAWI regulations - as long as the weighing is only for reference and is not used for any purpose mentioned above.)

*Scales purchased before this time are not affected - but may be subject to the requirements of other regulations.
**There are 5 other purposes too, but for this guide we will focus only on medical scales.

What do I need to do?

Now we have determined how the NAWI Directive applies to medical scales, we need to look at what the NAWI Directive says we need to do as consumers. In short, you need to ask your medical scale supplier to confirm that the scale you are purchasing meets the requirements of the NAWI Directive Regulations and check that the scale bears the necessary symbols, which are:

- a CE Mark (the manufacturer's declaration that their product meets the requirements of the applicable EC laws)
- an M sticker (the manufacturer's declaration that the scale conforms to NAWI)
- a 4 digit number (the identification number of one of several bodies who are authorised to test instruments and confirm that they accord with the European Directive on which the regulations are based).

What are Class III Approved Scales?

The NAWI directive defines the level of accuracy required by a weighing scale by giving it a Class. The most accurate being Class I which is used for highly accurate weighing where very little error in the result is accepted. The accuracy requirements of Class I and Class II scales are too great for most applications, so the most common accuracy class and the one that is used for trading (selling by weight - like in your local grocery) and medical weighing is Class III.

Class III Verification

Before it can be used as an approved weighing instrument, a scale must undergo a strict procedure known as a "Verification Test" (sometimes called a "Stamping"). A Verification Test puts a scale through numerous demanding procedures where it must perform to the required accuracy of its Class.

Among other procedures, the Verification Test includes "Weighing Performance" (where certified weights are placed on the scale all the way from zero to the scale's capacity - the maximum weight the scale can legally show) and "Repeatability" (where the same weight is placed on and off the scale multiple times). During these tests, in order to pass, the scale is only allowed to have errors or inaccuracies that fall within the maximum allowed errors for it's Class.

The Verification Test can only be undertaken by Approved Verifiers who have the authority to "stamp" a scale (or verify that it can be use as an approved scale). Once the scale has passed its test, the verifier marks the scale by a) placing a sticker on it with their 4 digit code, M and full postal details b) sealing it so it cannot be tampered with and c) issuing the Declaration of Conformity which is the certificate that comes with a Class III Approved scale to show it meets all required regulations.

What Scale should I buy?

Now that the legal side has been explained, you just need to decide which scale best suits your needs. There are many different types of scale, ones where you can stand on them and see your weight (some of these also have height measures and can show you your BMI or Body Mass Index - an indication of your height to weight ratio), ones where you can sit on them, and ones that can be used with wheelchairs.
Once you have decided which type of scale you need, the next step is to decide how big you will need it to be and the maximum weight you will need to put on the scale (this is known as the capacity of the scale).
Most of our scales come in standard sizes and standard capacities which will cover most applications, but if you need a larger scale or a higher capacity it may be worth looking at the Bariatric range. We specialise in Bariatric weighing and offer a wide range of high capacity models to suit all requirements. Please click here to see our range of Medical Scales.

AWM Launch ANPR Solutions for weighbridges and axle weighers
January 15, 2018
AWM Launch ANPR Solutions for weighbridges and axle weighers
Unmanned and Fully Automated In-Motion Axle Weighing is the ideal solution for weighing vehicles in and out of busy sites. Our powerful, acccurate and simple to use ANPR Systems use the Cardinal 825 Weight Indicator running the AWM ANPR axle weighing or ANPR weighbridge app.
The ANPR camera captures vehicle registrations day and night, in-motion or stationary, and allows a site to run 24/7 manned or unmanned. Weights, time and date, transaction data such as driver name, company, product etc Vehicle Registration, Vehicle Speed and Vehicle images are all captured automatically. An optional Cardinal SB500 remote display can provides traffic lights and driver commands on its clear 127mm dual row LED display helping to guide drivers through the site.
The 825 is connected via its on-board Ethenet port to the office PC where Vehicle images, full monitoring and reporting via Excel is available to the site operator. Our ANPR solutions are used in businesses throughout the UK and are the most cost effective, reliable and flexible ANPR weighing solutions available. Contact us for further details on or call +44(0)1284 701222.

Roller Conveyor Weighing Solutions
December 14, 2017
Roller Conveyor Weighing Solutions
AWM Limited are able to integrating weighing scales into any conveyor line and a recent project proved even the most demanding applications can be solved with the flexibility of our skilled fabricators and software team. The VWROLLER conveyor scale is completely custom built to order to ensure we can meet any project specification. With built-in custom rollers and fully customisable dimensions and capacities the VWROLLER is ideal weighing solution for any inline conveyor system. Download the VWROLLER Literature here and contact on for further information.
Brand new literature re-design for all VW platforms
December 11, 2017
Brand new literature re-design for all VW platforms

Brand new literature is now available for the complete VW range of platform scales and weighing solutions. Click here to view and download literature for all VW models.

We can add your company name and contact details free of charge to any of our literature, just contact us on and we will have a pdf proof back to you within 12 hours.

Successful Launch of New LUDI Lift Up Drive-In Platform Scale
November 15, 2017
Successful Launch of New LUDI Lift Up Drive-In Platform Scale
Great to receive such positive reviews for our new Lift Up Drive-In Platform Scale. One of our distributors sent us the below images and comments after installing one yesterday. 

"Some pics from yesterday's installation. We were very impressed with the quality of the equipment. One of our engineers is a welder by trade so he, like yourselves, was impressed with the construction and finish. Just in case any other dealers are interested I sent 2 guys for this installation due to the size/weight of platform and it took roughly 2 hours onsite to fix the platform to the floor, attach the indicator to wall, clean up the dust from drilling and test with weights. First of many hopefully!"

New Literature for the LUDI is available now. Contact us for further details and pricing on or call 01284 701222.
Successful Transition to ISO9001:2015 Quality System
October 24, 2017
Successful Transition to ISO9001:2015 Quality System
Following a recent SGS assessment we are pleased to announce our Quality System now conform to the requirements of ISO9001:2015! Congratulations to the whole AWM team and especially our amazing Office Manager Nikki Meekings who made it all possible. We are proud to be recognised as a quality company supplying quality products.
EWT pleased to welcome new full time Test Unit driver
October 02, 2017
EWT pleased to welcome new full time Test Unit driver
AWM Limited are pleased to announce that their subsidiary company Eastern Weighbridge Testing (EWT) have employed Gary Debenham to be their full time test unit driver and service coordinator. Contact Gary on or visit to see availability and book online.
Partnership provides Unmanned Weighbridge Solution for new AD Plant
September 26, 2017
Partnership provides Unmanned Weighbridge Solution for new AD Plant
AWM recently partnered with a highly respected UK weighbridge manufacturer to supply a cutting edge unmanned weighbridge solution for a new AD plant. 
With 100's of vehicles crossing the weighbridge 24/7 the system and weighbridge needed to be robust and user friendly to ensure zero down time and ease of use. The Cardinal Satellite remote terminal with a touchscreen 825 and RFID card reader provides the ideal data input terminal, minimising driver input and maximising vehicle throughput and valuable report data. RFID cards are issued to regular drivers enabling them to swipe once and go, whilst new drivers or one off visitors can easily type and select their information using the touch screen and QWERTY keypad. Barriers and sensors control the flow of vehicles and ensure that all vehicles have registered before entering the site. Powerful Cardinal WinVRS PC software provides the brains of the operation and enables extensive reporting and quick and easy database maintenance. This powerful package gives the customer complete control over their product flow, reporting and invoicing allowing them to continue their impressive expansion throughout the UK.
A brilliant end to a great AWM Dealer Week
August 17, 2017
A brilliant end to a great AWM Dealer Week
It's been open week at AWM and we have been demonstrating the excellent Baykon range of weight indicators, transmitters and weighing software. The culmination of one of the best meetings we have ever had was a big party in Cambridge, so much fun had by all - punting along the River Cam, a picnic on Jesus Green and a night out in Cambridge! Looking forward to next year's event already!
AWM appointed exclusive distributors for Vetta Macchi
July 19, 2017
AWM appointed exclusive distributors for Vetta Macchi
We are very pleased to announce that AWM Limited have been appointed exclusive distributors for Italian manufacturer Vetta Macchi.

AWM have supplied Vetta Macchi's products in the UK for over 10 years and today have signed an exclusive agreement to be their sole representive. Vetta Macchi have been manufacturing premium quality mechanical dial scales in their factory in Italy for over 65 years and offer a wide range of mild steel and stainless steel platforms ranging from 3kg to 5,000kg.

Please contact us with your requirements on +44 (0)1284 701222 or email for further information.

Welcome to our new Website!
July 10, 2017
Welcome to our new Website!
Welcome to the new AWM Limited Website!