Global patent index - EP 1002230 A1

EP 1002230 A1 2000-05-24 - GAS DETECTION DEVICE AND METHOD

Title (en)

GAS DETECTION DEVICE AND METHOD

Title (de)

VORRICHTUNG UND VERFAHREN ZUM GASNACHWEIS

Title (fr)

DISPOSITIF DE DETECTION DE GAZ ET PROCEDE

Publication

EP 1002230 A1 (EN)

Application

EP 98937671 A

Priority

  • GB 9802354 W
  • GB 9716701 A

Abstract (en)

[origin: WO9908102A1] A gas detection device for distinguishing at a single point, two simultaneously emitted gases and, and in particular, for measuring the individual concentration of each gas at the point, comprising two flow passages into which a sample comprising the two gases is input, gas induction means for drawing the sample into and through the flow passages and means for irradiating each of the flow passages with ultraviolet radiation of a different energy. The device may comprise two sources of ultraviolet radiation, wherein each of the sources (e.g. a krypton and an argon lamp) emits radiation into one of the flow passages. Upon irradiation of the gases (e.g. propane and propylene) within the sample the gases are ionised, one of them being ionised by radiation in one of the flow passages and the other being ionised by radiation in both of the flow passages. Each flow passage has an associated bias electrode, and a collector electrode which are arranged downstream of the irradiated flow passages. The currents at the collector electrodes give an indication of the ionised gas (or gases) in each flow passage. The invention also relates to a method of measuring, at a single point, the individual concentrations of two simultaneously emitted gases. This measurement may be used in the development of models and other tools for determining, for example, gas hazard or nuisance. The device and method have particular application in environmental pollution monitoring, atmospheric tracer gas detection and in the monitoring of gas or vapour emitting processes.

IPC 1-7 (main, further and additional classification)

G01N 27/66

IPC 8 full level (invention and additional information)

G01N 27/66 (2006.01); G01N 33/00 (2006.01)

CPC (invention and additional information)

G01N 27/66 (2013.01); G01N 33/0022 (2013.01); G01N 33/0031 (2013.01)

Citation (search report)

See references of WO 9908102A1

Designated contracting state (EPC)

CH DE FR GB IT LI

EPO simple patent family

WO 9908102 A1 19990218; CA 2299365 A1 19990218; EP 1002230 A1 20000524; GB 0001867 D0 20000322; GB 2343003 A 20000426; GB 9716701 D0 19971015

INPADOC legal status

2002-10-23 [18R] REFUSED

- Ref Legal Event Code: 18R

- Effective date: 20020603

2001-03-07 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20010119

2000-05-24 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000201

2000-05-24 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): CH DE FR GB IT LI