scope:

This European Standard defines metrological and technicalrequirements and tests of tyre pressure measuring instruments. Tyrepressure measuring instruments (often referred to as Tyre PressureGauges, [TPG]) are for the inspection of pressure and/or inspectionof inflation/deflation of tyres of motor vehicles. It establishesin the context of motor vehicles tyres, the minimum characteristicsof the chain of measurement of tyre pressure measuring instrumentsintended to inspect or adjust the pressure of tyres inflated by airor nitrogen. These devices, classified in different categories, arehereinafter referred to by generic term, "tyre pressure measuringinstruments". This chain of measurement consists of all theelements between the tyre valve and the display device (connector,hose, control device, measurement components, reservoir, presetdevice etc.). They indicate the pressure difference (pe) betweenthe air or the nitrogen in the tyre and the atmosphere. The fieldof application established above can be extended to otherapplications where no specific standard exists. Because of theinfluence of tyre pressure on road safety and energy efficiency,periodical verification of tyre pressure measuring instruments isstrongly recommended.