EP 0995100 A1 20000426 - METHOD FOR DETERMINING THE DENSITY OF A GAS
Title (en)
METHOD FOR DETERMINING THE DENSITY OF A GAS
Title (de)
VERFAHREN ZUR BESTIMMUNG DER DICHTE EINES GASES
Title (fr)
PROCEDE POUR DETERMINER LA MASSE VOLUMIQUE D'UN GAZ
Publication
Application
Priority
- FR 9801424 W 19980703
- FR 9708747 A 19970709
Abstract (en)
[origin: FR2765966A1] The invention concerns a method for determining the density of a gas consisting in: filling a chamber (12) capable of sustaining the pressure without noticeable deformation with a gas whereof the density is to be determined and providing an initial pressure Pi higher than normal atmospheric pressure, by pressurised supply means (20); allowing said gas to escape through purging means (30) provided with a sonic nozzle (40), and measuring the time DELTA t taken by the gas to pass, inside the chamber (12), from a first pressure P1 not higher than the initial pressure Pi, to a second pressure P2 lower than said initial pressure P1; computing the density rho of the gas being analysed using a general theoretical formula stored in a computer (60) memory and including said measured time DELTA t and the gas temperature T, and a constant k obtained by the calibrating computer calibration (60) on the basis of a reference gas whereof the density is known.
IPC 1-7
IPC 8 full level
CPC (source: EP)
G01N 9/266 (2013.01); G01N 9/32 (2013.01)
Citation (search report)
See references of WO 9902964A1
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE
DOCDB simple family (publication)
FR 2765966 A1 19990115; FR 2765966 B1 19990820; CA 2303805 A1 19990121; EP 0995100 A1 20000426; JP 2001509594 A 20010724; WO 9902964 A1 19990121
DOCDB simple family (application)
FR 9708747 A 19970709; CA 2303805 A 19980703; EP 98935091 A 19980703; FR 9801424 W 19980703; JP 2000502397 A 19980703