FR2270584A1 - Appts for detecting measuring nitrogen oxides - Google Patents

Appts for detecting measuring nitrogen oxides

Info

Publication number
FR2270584A1
FR2270584A1 FR7513378A FR7513378A FR2270584A1 FR 2270584 A1 FR2270584 A1 FR 2270584A1 FR 7513378 A FR7513378 A FR 7513378A FR 7513378 A FR7513378 A FR 7513378A FR 2270584 A1 FR2270584 A1 FR 2270584A1
Authority
FR
France
Prior art keywords
electrode
gas
appts
detected
working electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7513378A
Other languages
French (fr)
Other versions
FR2270584B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ENERGETICS SCIENCE
Original Assignee
ENERGETICS SCIENCE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US05/467,671 external-priority patent/US4001103A/en
Priority claimed from IT83354/75A external-priority patent/IT1029166B/en
Application filed by ENERGETICS SCIENCE filed Critical ENERGETICS SCIENCE
Publication of FR2270584A1 publication Critical patent/FR2270584A1/en
Application granted granted Critical
Publication of FR2270584B1 publication Critical patent/FR2270584B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/404—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors
    • G01N27/4045—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors for gases other than oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
    • B21D11/12—Bending specially adapted to produce specific articles, e.g. leaf springs the articles being reinforcements for concrete

Abstract

Appts. for detecting and measuring the concn. of NO or NO2, esp. in waste combustion gases, has an inlet, an electrochemical cell, a pump for supplying gas contg. NO or NO2 from the inlet to the electrochemical cell at a controlled flow rate, and a device for indicating the amt. of NO and NO2. The electrochemical cell has a working electrode, that has a catalytic zone for the electrochemical reaction with the gas to be detected, a counter electrode, a reference electrode, and an electrolyte that contacts all three electrodes. The working electrode is placed in a reaction chamber in which it is contacted with the gas, and a stabiliser is provided for maintaining the working electrode at a constant voltage relative to the reference electrode. This voltage is 0.9-1.1 V, relative to a reversible hydrogen electrode in the electrolyte, when the gas to be detected is NO, and is 0.7-1.1 V, relative to the reversible hydrogen electrode, when the gas to be detected is NO2. The catalyst of the working electrode can either effect the electro-oxidn. of NO, or the electro-reduction of NO2, and is deposited on a hydrophobic material to form a diffusion electrode. Cheap, compact, easily operated appts., accurately detects and assesses the quantity of NO or NO2, even when this is present in low concentrations in the presence of high concentrations of CO.
FR7513378A 1974-05-07 1975-04-29 Appts for detecting measuring nitrogen oxides Granted FR2270584A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/467,671 US4001103A (en) 1974-05-07 1974-05-07 Device for the detection and measurement of NO and NO2 gases
IT83354/75A IT1029166B (en) 1975-04-18 1975-04-18 BENDING UNIT WITH SHAPED CENTRAL RETURNING PIN FOR AUTOMATIC BENDING MACHINES OF WIRE AND BARS IN METALLIC MATERIAL

Publications (2)

Publication Number Publication Date
FR2270584A1 true FR2270584A1 (en) 1975-12-05
FR2270584B1 FR2270584B1 (en) 1980-07-11

Family

ID=26330062

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7513378A Granted FR2270584A1 (en) 1974-05-07 1975-04-29 Appts for detecting measuring nitrogen oxides

Country Status (2)

Country Link
DE (1) DE2613264C2 (en)
FR (1) FR2270584A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2382011A1 (en) * 1977-02-28 1978-09-22 Gen Electric ELECTROCHEMICAL GAS DETECTOR STABLE WITH RESPECT TO TEMPERATURE CONDITIONS
FR2477715A1 (en) * 1980-03-10 1981-09-11 Becton Dickinson Co DEVICE FOR DETECTION AND DETERMINATION OF HARMFUL GAS
WO1988000701A1 (en) * 1986-07-11 1988-01-28 Allied Corporation Amperometric gas sensor containing a solid electrolyte
EP0436148A1 (en) * 1989-12-16 1991-07-10 Drägerwerk Aktiengesellschaft Electrochemical cell for sensing of gaseous components in fluid medias

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1125327B (en) * 1979-02-28 1986-05-14 Piegatrici Macch Elettr STAPLING MACHINE
CH652947A5 (en) * 1981-11-18 1985-12-13 O E M B S A WIRE BENDING MACHINE.
GB2119299A (en) * 1982-03-04 1983-11-16 Pa Management Consult Making cutting tools
AT377713B (en) * 1982-08-23 1985-04-25 Evg Entwicklung Verwert Ges BENDING DEVICE FOR WIRE OR TAPE-SHAPED MATERIAL

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1846451U (en) * 1961-12-08 1962-02-08 Peddinghaus Paul Ferd Fa BENDING MACHINE FOR THE PRODUCTION OF HOOKS AND Z-SHAPED BENDING ON CONCRETE IRON BARS.
FR1457786A (en) * 1965-10-29 1966-11-04 Automatic machine for forming rebars
BE791166A (en) * 1972-04-12 1973-03-01 Evg Entwicklung Verwert Ges WIRE OR METAL TAPE CRUSHER
AT316268B (en) * 1972-05-02 1974-07-10 Evg Entwicklung Verwert Ges Bending machine for rod or strip material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2382011A1 (en) * 1977-02-28 1978-09-22 Gen Electric ELECTROCHEMICAL GAS DETECTOR STABLE WITH RESPECT TO TEMPERATURE CONDITIONS
FR2477715A1 (en) * 1980-03-10 1981-09-11 Becton Dickinson Co DEVICE FOR DETECTION AND DETERMINATION OF HARMFUL GAS
WO1988000701A1 (en) * 1986-07-11 1988-01-28 Allied Corporation Amperometric gas sensor containing a solid electrolyte
EP0436148A1 (en) * 1989-12-16 1991-07-10 Drägerwerk Aktiengesellschaft Electrochemical cell for sensing of gaseous components in fluid medias

Also Published As

Publication number Publication date
DE2613264C2 (en) 1983-03-17
DE2613264A1 (en) 1976-10-28
FR2270584B1 (en) 1980-07-11

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Legal Events

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