EN 12645:2014
(Main)Tyre pressure measuring instruments - Devices for inspection of pressure and/or inflation / deflation of tyres for motor vehicles - Metrology, requirements and testing
Tyre pressure measuring instruments - Devices for inspection of pressure and/or inflation / deflation of tyres for motor vehicles - Metrology, requirements and testing
This European Standard defines metrological and technical requirements and tests of tyre pressure measuring instruments.
Tyre pressure measuring instruments (often referred to as Tyre Pressure Gauges, [TPG]) are for the inspection of pressure and/or inspection of inflation/deflation of tyres of motor vehicles.
It establishes in the context of motor vehicles tyres, the minimum characteristics of the chain of measurement of tyre pressure measuring instruments intended to increase, inspect or adjust the pressure of tyres inflated by air or nitrogen.
These devices, classified in different categories, are hereinafter referred to by generic term, "tyre pressure measuring instruments".
This chain of measurement consists of all the elements between the tyre valve and the display device (connector, hose, control device, measurement components, reservoir, preset device etc.).
They indicate the pressure difference (pe) between the air or the nitrogen in the tyre and the atmosphere.
The field of application established above can be extended to other applications where no specific standard exists.
Because of the influence of tyre pressure on road safety and energy efficiency, periodical reverification is strongly advised.
Reifendruckmessgeräte - Geräte zum Prüfen des Druckes und/oder zum Füllen / Entleeren von Reifen an Kraftfahrzeugen - Messtechnik, Anforderungen und Prüfungen
Diese Europäische Norm legt messtechnische und technische Anforderungen und Prüfungen von Reifendruckmessgeräten fest.
Reifendruckmessgeräte (oftmals auch benannt als Reifendruckmesser, [en: TPG]) werden zur Kontrolle des Drucks und/oder Kontrolle der Füllung/Entleerung von Kraftfahrzeugreifen verwendet.
Sie stellen im Zusammenhang mit Kraftfahrzeugreifen die Mindestmerkmale der Messkette von Reifendruckmessgeräten zur Prüfung oder Einstellung des Druckes von mit Luft oder Stickstoff gefüllten Reifen dar.
Diese in verschiedene Kategorien eingeteilten Geräte werden nachstehend als „Reifendruckmessgeräte“ bezeichnet.
Diese Messkette beinhaltet alle Elemente, die sich zwischen dem Reifenventil und der Anzeigeeinheit (Anschluss, Schlauch, Regeleinrichtung, Bestandteile der Messeinrichtung, Behälter, Vorwahleinrichtung usw.) befinden.
Die Reifendruckmessgeräte zeigen den Druckunterschied (pe) zwischen der Luft oder dem Stickstoff im Reifen und der Atmosphäre an.
Der oben beschriebene Anwendungsbereich kann auf andere Anwendungen ausgedehnt werden, für die keine besondere Norm vorhanden ist.
Aufgrund der Bedeutung des Reifendruckes für die Verkehrssicherheit sowie für die Energieeffizienz werden periodische amtliche Prüfungen dringend empfohlen.
Instruments de mesure de la pression des pneumatiques - Dispositifs de contrôle de la pression et/ou de gonflage / dégonflage des pneumatiques des véhicules motorisés - Métrologie, exigences et essais
Cette norme européenne définit des exigences métrologiques et techniques et les essais d’instruments de mesure de pression des pneumatiques.
Les instruments de mesure de pression des pneumatiques (souvent désigné comme des Manomètres de Pneumatiques, [TPG]) sont pour l'inspection de la pression et/ou l'inspection du gonflage/dégonflage des pneumatiques de véhicules motorisés.
Elle fixe dans le cadre d’une application aux pneumatiques des véhicules motorisés, les caractéristiques minimales de la chaîne de mesurage des instruments de mesure de pression des pneumatiques destinés à vérifier ou ajuster la pression des pneumatiques gonflés à l’air ou à l’azote.
Ces dispositifs classés dans différentes catégories sont désignés ci-après par le terme générique "instruments de mesure de pression des pneumatiques".
Cette chaîne de mesure se compose de tous les éléments situés entre la valve du pneumatique et le dispositif afficheur (raccord, tuyau, dispositif de commande, composants de mesure, réservoir, dispositif de prédétermination, etc.).
Ils indiquent la différence de pression (pe) entre l'air ou l'azote dans le pneumatique et l'atmosphère.
Le domaine d'application défini ci-dessus peut être étendu à d'autres applications dans le cas où il n’existerait pas de norme spécifique.
En raison de l'influence de la pression du pneumatique sur la sécurité routière et sur l’efficacité énergétique, la vérification périodique des instruments de mesure de pression des pneumatiques est fortement conseillée.
Merilniki tlaka v pnevmatikah - Naprave za nadzor tlaka in/ali napihovanje/izpuščanje pnevmatik motornih vozil - Meroslovje, zahteve in preskušanje
Standard EN 12645 določa meroslovne in tehnične zahteve ter preskuse merilnikov tlaka v pnevmatikah. Merilniki tlaka v pnevmatikah so namenjeni nadzoru tlaka in/ali nadzoru napihovanja/izpuščanja pnevmatik motornih vozil. V zvezi s pnevmatikami motornih vozil določa minimalne karakteristike merilne verige merilnikov tlaka v pnevmatikah za nadzor ali prilagajanje pnevmatik, ki se napihnejo z zrakom ali dušikom. Te naprave, razvrščene v različne kategorije, se v nadaljevanju opisujejo s splošnim izrazom »merilniki tlaka v pnevmatikah«. To merilno verigo sestavljajo vsi elementi med ventilom pnevmatike in prikazno napravo (povezovalni priključek, cev, nadzorna naprava, merilne komponente, rezervoar, prednastavljena naprava itd.). Kažejo razliko v tlaku (pe) med zrakom ali dušikom v pnevmatiki in atmosferi. Zgoraj določeno področje uporabe je mogoče razširiti na druge uporabe, kadar ni posebnega standarda. Zaradi vpliva tlaka v pnevmatikah na varnost na cesti in energetsko učinkovitost se močno priporoča redno preverjanje merilnikov tlaka v pnevmatikah.
General Information
- Status
- Published
- Publication Date
- 19-Aug-2014
- Technical Committee
- CEN/TC 301 - Electrically propelled road vehicles
- Drafting Committee
- CEN/TC 301 - Electrically propelled road vehicles
- Current Stage
- 9060 - Closure of 2 Year Review Enquiry - Review Enquiry
- Start Date
- 02-Sep-2025
- Completion Date
- 02-Sep-2025
Relations
- Effective Date
- 08-Jun-2022
Overview
EN 12645:2014 is the CEN European Standard for tyre pressure measuring instruments (often called tyre pressure gauges, TPG). It defines the metrological and technical requirements, classification and type‑approval/testing procedures for devices used to inspect, inflate or deflate motor vehicle tyres (air or nitrogen). The standard covers the entire measurement chain (valve connector, hose, control device, sensor, reservoir, preset device, display) and applies to both mechanical (analog) and electronic (digital) instruments. EN 12645:2014 supersedes the 1998 edition and adds specific requirements for electronic devices and metrological control (type approval, initial/subsequent verification and in‑service control).
Key topics and requirements
- Metrological requirements
- Accuracy limits including maximum permissible errors (MPE), hysteresis, and zero return/setting.
- Indication of pressure difference between tyre and atmosphere (units and readability).
- Technical and constructional requirements
- Design rules for analog (Bourdon/diaphragm) and digital indicators (scale intervals, readability, scale angle).
- Requirements for preset devices, reservoirs and connectors forming the measurement chain.
- Environmental and mechanical tests
- Climatic: cold, dry heat, damp heat, humidity cycles, salt mist.
- Mechanical: vibration, free‑fall, durability, ingress protection (IP rating).
- Electromagnetic compatibility (EMC) and software
- Immunity tests (ESD, radiated and conducted RF, surges, mains variations) and software examination for electronic instruments.
- Verification and marking
- Type approval testing, initial and subsequent verification, and in‑service control procedures.
- Obligatory inscriptions, verification marks and sealing requirements.
Applications and users
- Vehicle service centers and tyre workshops using tyre pressure gauges for routine tyre inflation/inspection.
- Manufacturers and designers of tyre pressure measuring instruments seeking compliance and market access in Europe.
- Accredited test laboratories performing type approval, metrological testing and verification.
- Fleet operators and safety/quality managers implementing maintenance protocols to improve road safety and fuel efficiency.
- Regulators and procurement teams specifying compliant measurement equipment for public services.
Related standards
- EN 837-1 / EN 837-3 (pressure gauge requirements)
- EN 60068 series (environmental testing: cold, heat, humidity, vibration, free fall)
- EN 60529 (degrees of protection - IP code)
- EMC standards referenced for immunity and emissions testing
EN 12645:2014 is essential for ensuring tyre pressure measuring instruments are accurate, robust and safe - supporting road safety, tyre life and vehicle energy efficiency. Periodic reverification of instruments is strongly recommended.
Frequently Asked Questions
EN 12645:2014 is a standard published by the European Committee for Standardization (CEN). Its full title is "Tyre pressure measuring instruments - Devices for inspection of pressure and/or inflation / deflation of tyres for motor vehicles - Metrology, requirements and testing". This standard covers: This European Standard defines metrological and technical requirements and tests of tyre pressure measuring instruments. Tyre pressure measuring instruments (often referred to as Tyre Pressure Gauges, [TPG]) are for the inspection of pressure and/or inspection of inflation/deflation of tyres of motor vehicles. It establishes in the context of motor vehicles tyres, the minimum characteristics of the chain of measurement of tyre pressure measuring instruments intended to increase, inspect or adjust the pressure of tyres inflated by air or nitrogen. These devices, classified in different categories, are hereinafter referred to by generic term, "tyre pressure measuring instruments". This chain of measurement consists of all the elements between the tyre valve and the display device (connector, hose, control device, measurement components, reservoir, preset device etc.). They indicate the pressure difference (pe) between the air or the nitrogen in the tyre and the atmosphere. The field of application established above can be extended to other applications where no specific standard exists. Because of the influence of tyre pressure on road safety and energy efficiency, periodical reverification is strongly advised.
This European Standard defines metrological and technical requirements and tests of tyre pressure measuring instruments. Tyre pressure measuring instruments (often referred to as Tyre Pressure Gauges, [TPG]) are for the inspection of pressure and/or inspection of inflation/deflation of tyres of motor vehicles. It establishes in the context of motor vehicles tyres, the minimum characteristics of the chain of measurement of tyre pressure measuring instruments intended to increase, inspect or adjust the pressure of tyres inflated by air or nitrogen. These devices, classified in different categories, are hereinafter referred to by generic term, "tyre pressure measuring instruments". This chain of measurement consists of all the elements between the tyre valve and the display device (connector, hose, control device, measurement components, reservoir, preset device etc.). They indicate the pressure difference (pe) between the air or the nitrogen in the tyre and the atmosphere. The field of application established above can be extended to other applications where no specific standard exists. Because of the influence of tyre pressure on road safety and energy efficiency, periodical reverification is strongly advised.
EN 12645:2014 is classified under the following ICS (International Classification for Standards) categories: 17.100 - Measurement of force, weight and pressure; 43.180 - Diagnostic, maintenance and test equipment; 83.160.10 - Road vehicle tyres. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 12645:2014 has the following relationships with other standards: It is inter standard links to EN 12645:1998. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 12645:2014 is associated with the following European legislation: EU Directives/Regulations: 86/217/EEC; Standardization Mandates: M/457. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
EN 12645:2014 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.SUHVNXãDQMHReifendruckmessgeräte - Geräte zum Prüfen des Druckes und/oder zum Füllen / Entleeren von Reifen an Kraftfahrzeugen - Messtechnik, Anforderungen und PrüfungenInstruments de mesure de la pression des pneumatiques - Dispositifs de contrôle de la pression et/ou de gonflage / dégonflage des pneumatiques des véhicules motorisés - Métrologie, exigences et essaisTyre pressure measuring instruments - Devices for inspection of pressure and/or inflation / deflation of tyres for motor vehicles - Metrology, requirements and testing83.160.10Pnevmatike za cestna vozilaRoad vehicle tyres43.180Diagnostic, maintenance and test equipment17.100Merjenje sile, teže in tlakaMeasurement of force, weight and pressureICS:Ta slovenski standard je istoveten z:EN 12645:2014SIST EN 12645:2014en,de01-november-2014SIST EN 12645:2014SLOVENSKI
STANDARDSIST EN 12645:20011DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12645
August 2014 ICS 17.100; 43.180; 83.160.10 Supersedes EN 12645:1998English Version
Tyre pressure measuring instruments - Devices for inspection of pressure and/or inflation / deflation of tyres for motor vehicles - Metrology, requirements and testing
Instruments de mesure de la pression des pneumatiques - Dispositifs de contrôle de la pression et/ou de gonflage / dégonflage des pneumatiques des véhicules motorisés - Métrologie, exigences et essais
Reifendruckmessgeräte - Geräte zum Prüfen des Druckes und/oder zum Füllen / Entleeren von Reifen an Kraftfahrzeugen - Messtechnik, Anforderungen und Prüfungen This European Standard was approved by CEN on 31 August 2013.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12645:2014 ESIST EN 12645:2014
Correspondence between requirements and tests . 29 Annex B (normative)
MPE graphics . 30 Annex C (informative)
Examples of type approval test sequence for multiple samples . 32 Annex D (informative)
Recommended solutions for special test conditions . 35 Bibliography . 36
Key A fixed components B portable components Figure 1 — Fixed device EXAMPLE Wall fixing inflation devices. 4.2 category 2 - Portable device tyre pressure measuring instrument where the measuring components and the displaying device are portable Note 1 to entry: They are generally connected to the control device and a reservoir under limited pressure or an integrated compressor or a source of air. See Figure 2. SIST EN 12645:2014
Figure 2 — Portable device EXAMPLE Inflation terminal. 4.3 category 3 - Handheld device tyre pressure measuring instrument where the measuring components and the displaying device are handheld Note 1 to entry: They can be connected to the control device or grouped together with the control device. See Figure 3.
Figure 3 — Hand-held device EXAMPLE Inflation gun, pressure inspector. SIST EN 12645:2014
in kPa Maximum permissible errors (MPE) ± in kPa Ambient temperature (tamb) in °C for tyre pressure measuring instruments below 15 °C from 15 °C to 25 °C above 25 °C ≤ 400 0,5 * (15 - tamb) + 8 8 0,5 * (tamb - 25) + 8 > 400 to ≤ 1 000 0,5 * (15 - tamb) + 16 16 0,5 * (tamb - 25) + 16 > 1 000 0,5 * (15 - tamb) + 25 25 0,5 * (tamb - 25) + 25 Table 2 — Maximum permissible errors ± in bar Measured pressure
in bar Maximum permissible errors (MPE) ± in bar Ambient temperature (tamb) in °C for tyre pressure measuring instruments below 15 °C from 15°C to 25 °C above 25 °C ≤ 4 0,005 * (15 - tamb) + 0,08 0,08 0,005 * (tamb - 25) + 0,08 > 4 to ≤ 10 0,005 * (15 - tamb) + 0,16 0,16 0,005 * (tamb - 25) + 0,16 > 10 0,005 * (15 - tamb) + 0,25 0,25 0,005 *(tamb - 25) + 0,25 A graphical representation of these two tables is provided in Annex B. 5.2 Hysteresis error Hysteresis error of tyre pressure measuring instruments shall not exceed the absolute value of the maximum permissible error, given in 5.1 in the column “from 15 °C to 25 °C”. 5.3 Zero 5.3.1 Return of the instrument's indication to zero If the instrument indicates zero, the ‘real’ indication shall be within MPE or the instrument shall not indicate values below the minimum value of measured pressure. At atmospheric pressure, the index shall stop at the zero mark or at a predetermined mark clearly differentiated from the scale intervals, within the limits of the maximum permissible error. 5.3.2 Zero setting An instrument may be equipped with an automatic or semi-automatic zero-setting device. The semi-automatic zero-setting device has to check being at the atmospheric pressure before setting to zero. Manual zero-setting is not allowed except by switching OFF and ON. NOTE Manual means the operator can influence the result. SIST EN 12645:2014
The tyre pressure measuring instrument is subject to the dry heat requirements according to EN 60068-2-2. The tyre pressure measuring instrument is subject to the cold requirements according to EN 60068-2-1. SIST EN 12645:2014
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