Cesame Exadebit

LNE_LADG_LOGO_RGBLNE LADG (Cesame Exadebit) has an experience in flow measurement for almost 30 years. It is the French designated Institute for gas flow measurement. It maintains and developps the National gas flow standards (CVFN) and their primary calibration facility (P,V,T,t) method.
It is also one of the three partner including PTB, VSL(former NMI) of the harmonisation agreement of the so called «Harmonised European Reference Value for the Natural Gas Cubic Meter».
In addition Cesame Exadebit is an accredited laboratory for calibration and testing flow, it also performs the verification of gas meter for legal metrology purpose. It cooperates also with measuring instruments users or manufacturer in France and abroad. Since the end of the nineties LADG has developped expertise for gas flow rate measurement using LDV Techniques in order to evaluate the accuracy of this approach with and without perturbed flows. This research was conducted in collaboration with the French Space Lab ONERA. LADG has followed carefully for more than 20 years (within Euramet, publication or direct contact) the research works carried out by PTB about LDV and miniaturised lasers for measuring and investigating flows.

Key publications :

Vallet / Windenberger / Strzelecki Développement de references débitmétriques basées sur la mesure de vitesse par anémométrie laser à effet doppler. Rapport BNM / LADG – 2005
Strzelecki / Gajan Experimental Investigation of the Jets in Crossflow: Nonswirling Flow Case AIAA Journal, Vol. 47, No. 5 – 2009
Gajan / Strzelecki Utilisation de l’anémométrie Doppler Laser pour la Caractérisation de débitmètres à diaphragme : influence des conditions d’écoulement amont 4ème congrès francophone de Vélocimétrie Doppler Laser, Poitiers 1994
Dopheide / Van der Beek / Vallet The Harmonized European Gas Cubic Meter for Natural Gas realized by PTB , NMi–VSL and BNM and Its Benefit FOR USER AND Metrology”. Flomeko 2004 – Guilin, China and Revue Française de Metrologie, volume 2005-2.
Wright / Vallet / Mickan Comparaisons by PTB, NIST, and LADG in Air and Natural Gas with Critical Venturi Nozzles agree within 0,05 %, 6 th Fluid Flow Symposium MEXICO – 2006 and «High definition flow» Mechanical Engineering Review 2009