The Measuring Instruments Directive (with the official reference number 2014/32/EU) establishes the requirements that the devices and systems which fall under its scope must satisfy before being placed on the market and/or put into use.
When trading Measuring Instruments on the European market, its mandatory to obtain the CE-mark for every company or entity. With the CE-mark you will declare that the product is in accordance with all legal requirements that are set out in Directive 2014/32/EU. The production process and the quality management system must comply with the requirements, the documentation that accompanies the item must be verified, and the manual must be available to consumers. When your equipment is in accordance with this set of requirements, the CE-mark can be affixed and the product can be legally introduced to the European market. Keep in mind, putting a product on the market, makes you responsible for its safety in use.