What are Automatic Weighing Instruments (AWI) compliant with Directive 2014/32/EU, or the Measuring Instruments Directive (MID)?

An automatic weighing instrument is an instrument that determines the mass of a product without the intervention of an operator.
Its characteristic is to follow a predetermined program of automatic processes.

For commercial use, such instruments must comply with the requirements stated in Directive 2014/32/EU, in particular:

• The essential requirements of Annex I ;
• The specific requirements of Annex VIII (MI-006).

LAUMAS provides weight indicators (W series) and weight transmitters (TLB and TLB4) that comply with the Directive and are certified as “MID transmitters” for gravimetric filling machines (TLB4 also for catchweighers). In order to compose a weighing system certified as a complete MID device, the weight transmitters will have to be connected to other devices and the whole assembly will have to be certified.

Here is a list of the main automatic weighing instruments that must meet the OIML (International Organization of Legal Metrology) requirements and recommendations:

• Catchweigher - OIML R 51
  An automatic instrument for determining the mass of discrete loads (i.e. composed of a single piece that cannot be divided, such as a package) or single loads of bulk material.
  
  
• Control weight batcher - OIML R 51
  A catchweigher that divides objects of different masses into one or more subsets, based on how much their mass differs from a nominal target value that you would like to obtain.
  
  
• Weight labeler - OIML R 51
  A catchweigher that labels individual items with their weight.
  
  
• Weight/price labeler - OIML R 51
  An automatic instrument that labels individual items with their weight and price information.
  
  
• Gravimetric filling machine - OIML R 61
  An automatic instrument that fills containers with a predetermined and virtually constant mass of bulk product.
  
  
• Discontinuous totalizer (hopper totalizer) - OIML R 107
  An automatic instrument that determines the mass of a bulk product by dividing it into separate loads.
  The masses of each discrete load are determined one after another and added together. Each discrete load is then added to the heap.
  
  
• Continuous totalizer - OIML R 50
  An automatic instrument that determines the mass of a bulk product placed on a conveyor belt, without the need for a systematic subdivision of the product and without interrupting the movement of the belt.
  
  
• Railway vehicle weighbridge - OIML R 106
  An automatic instrument equipped with a load receiver including tracks, on which transit the railway vehicles being weighed.