Yokogawa Oxygen Analyzer Selection Guide (Reference)

Oxygen Analyzer Selection Guide Technical Information TI 11A03A01-01E Model ZR22G/ZR402G/AV550G Direct In-Situ Zirconia Oxygen Analyzer (Separate type) Zirconia Oxygen Averaging Converter Explosionproof Zirconia Oxygen Analyzer Model ZR22S (Separate type) AV550G Model ZR202S (Integrated type) ZR22G ZR402G Model ZR202G Direct In-Situ Zirconia Oxygen Analyzer (Integrated type) Model MG8G/MG8E Paramagnetic Oxygen Analyzer MG8G (General purpose type) MG8E Model OX400 Low Concentration Zirconia Oxygen Analyzer Model OX100/OX102 Limiting Current Oxygen Analyzer (Flameproof type) Model TDLS200 Tunable Diode Laser Analyzer Yokogawa Electric Corporation 2-9-32 Nakacho, Musashino-shi, Tokyo 180-8750, Japan Tel.: 81-422-52-5617 Fax.: 81-422-52-6792 TI 11A03A01-01E 1st Edition, Jun. 2009 (YK) 2nd Edition, Nov. 2011 (YK)   Oxygen Analyzer Selection Guide n Oxygen Analyzer Measurement Systems and Their Drawbacks and Advantages Zirconia type measurement system Advantages Concentration cell system A solid electrolyte like zirconia exhibits conductivity of oxygen ions • C an be directly installed in a combustion at high temperature. As shown in the figure below, when porous process such as a boiler’s flue and requires platinum electrodes are attached to both sides of the zirconia element no sampling system. and response is faster to be heated up and gases of different partial oxygen concentrations (ZR22G, ZR202G). are brought into contact with the respective surfaces of the zirconia, • C a p a b l e o f m e a s u r i n g t r a c e o x y g e n the device acts as an oxygen concentration cell. This phenomenon concentration (OX400). causes an electromotive force to be generated between both electrodes according to Nernst’s equation. Gas of high oxygen concentration P1 Electrode (cathode) Zirconia element P2 Gas of low oxygen concentration Electrode (anode) Drawbacks Yokogawa Electric’s model codes: • If the sample gas contains a flammable gas, a ZR22G/ZR402G, measurement error occurs (combustion exhaust ZR202G, gas causes almost no problem because it is ZR22S/ZR402G, completely burned). ZR202S, and OX400 Advantages Limiting Current type As shown in the figure below, if the flow of oxygen into the cathode • C a p a b l e o f m e a s u r i n g t r a c e o x y g e n of a zirconia element heated to high temperature is limited, there concentration. appears a region where the current becomes constant even when the • Calibration is required only on the span side (air). applied voltage is increased. This limited current is proportional to the oxygen concentration. Gas diffusion hole Diffusion chamber O2 Cathode Zirconia, or solid electrolyte O2 Anode Current Yokogawa Electric’s Drawbacks model codes: • If the sample gas contains a flammable gas, a OX100 and OX102 measurement error occurs. • The presence of dust causes clogging of the gas diffusion holes on the cathode side; a filter must be installed in a preceding stage. Magnetic type measurement system Advantages Paramagnetic system This is one of the methods utilizing the paramagnetic property of • Capable of measuring flammable gas mixtures oxygen. When a sample gas contains oxygen, the oxygen is drawn that cannot be measured by a zirconia oxygen into the magnetic field, thereby decreasing the flow rate of auxiliary analyzer. gas in stream B. The difference in flow rates of the two streams, A • B ecause there is no sensor in the detecting and B, which is caused by the effect of flow restriction in stream B, is section in contact with the sample gas, the proportional to the oxygen concentration of the sample gas. The flow paramagnetic system can also measure rates are determined by the thermistors and converted into electrical corrosive gases. signals, the difference of which is computed as an oxygen signal. • Among the magnetic types, the paramagnetic system offers a faster response time than other systems. Auxiliary gas • Among the magnetic types, the paramagnetic Sample gas system is more resistant to vibration or shock than other systems. Magnet Exhaust out Sample + auxiliary gas Thermistors B A Drawbacks Yokogawa Electric’s • Requires a sampling unit corresponding to the model sample gas properties or applications. codes: MG8G and MG8E TI 11A03A01-01E 2nd Edition Nov.10,2011-00  Oxygen Analyzer Selection Guide  Tunable Diodel Laser measurement system Advantages Tunable Diode Laser (or TDL) measurements are based on absorption spectroscopy. The TruePeak Analyzer is a TDL system and operates by • C apable of measuring a number of measuring the amount of laser light that is absorbed (lost) as it travels through nearinfrared absorbing gases in difficult the gas being measured. In the simplest form a TDL analyzer consists of process applications. a laser that produces infrared light, optical lenses to focus the laser light • C apability of measuring at very high through the gas to be measured and then on to a detector, the detector, and temperature, high pressures and under electronics that control the laser and translate the detector signal into a signal difficult conditions (corrosive, aggressive, representing the gas concentration. high particulate service). Gas molecules absorb light at specific colors, called absorption lines. This • Most applications are measured in-situ, absorption follows Beers law. reducing installation and maintenance TDL Analyzers are effectively infrared analyzers which obey the Beer- costs. Lambert Law. • Most measurements are rapid (5 seconds) I = I0•e-E.G.L and interference free. where I is the radiation intensity after absorption I0 is the initial radiation intensity E is the extinction coefficient G is the gas concentration and L is the path length of the measurement area Yokogawa Electric’s model code: TDLS200 Laser diode Optical path Photo detector (Photo diode) Laser beam Drawbacks • Initial installation for the mounting flange is required. Process gas stream TI 11A03A01-01E 2nd Edition Nov.10,2011-00   Oxygen Analyzer Selection Guide n Selection Guide for Oxygen Analyzers Measuring System Model Min. measuring range Limiting Current Zirconia ZR22G,ZR402G/ ZR202G/ ZR22S,ZR402G(*2) ZR202S (*2) Specifications 0 – 5 vol% O2 0 – 5 vol% O2 ZR22G,ZR22S AV550G 0 – 5 vol% O2 OX400 OX100/OX102 0 – 10 ppm O2 0 – 1000 ppm O2/ 0 – 100 ppm O2 0 – 25 vol% O2 Fixed to 2 ranges/ 0 – 100 ppm O2 Not available 4 – 20 mA DC or 1 – 5 V DC/ 4 – 20 mA DC 0 – 70°C 1013±40 hPa Abs Max. measuring range Measuring range setting 0 – 100 vol% O2 0 – 100 vol% O2 0 – 100 vol% O2 Settable arbitrarily within the range (in vol% O2 units) 0 – 100 vol% O2 Auto/Man. Partial range Output signal Available 4 – 20 mA DC HART Available 4 – 20 mA DC HART Sample gas temperature Sample gas pressure 0 – 1400°C (*1) -5 – 250 kPa (*3) 0 – 700°C -5 – 250 kPa Available 4 – 20 mA DC 8 points Fieldbus 0 – 1400°C (*1) -5 – 250 kPa (*3) Available 4 – 20 mA DC and 0-1, 5, 10 V DC (selectable) 0 – 50°C 0 – 300 Pa Response time (90%) (When gas is introduced from the detector inlet) 5 sec or less 5 sec or less 5 sec or less Warm-up time Explosionproof construction Application form 20 min Non-explosionproof protected (*2) Stationary 20 min Non-explosionproof protected(*2) Stationary 20 min Non-explosionproof protected Stationary Separately installed sampling system Not required Not required Not required 10 sec or less (1% O2 or more) 30 sec or less (less than 1% O2) 20 min or less Non-explosionNon-explosionproof protected proof protected Stationary/ Stationary Transportable May be required depending on applications. Package boiler combustion control, gas fired Combustion control of power generation boilers, gas fired Combustion control of pulverized coal boilers Combustion control of hot stoves for steelmaking Heating and combustion exhaust gas control of coke ovens for steelmaking Low-oxygen concentration control of reheating and soaking furnaces for steelmaking Air leakage detection of sintering furnaces for steelmaking Low-oxygen concentration control of CDQ plants for steelmaking Lime kiln combustion control Cement kiln combustion control Combustion control of heating furnaces for oil refinery & petrochemical industry Naphtha cracking furnaces Oxygen concentration control of gas containing a flammable gas Safety control (explosion prevention) at various plants Measurement of trace oxygen concentration in various manufacturing processes City gas quality control Incinerator combustion control Oxygen concentration measurement in oxygen enrichment facilities Oxygen concentration measurement of exhaust gas from activated sludge process equipment Oxygen concentration control of N2 reflow furnaces Atmospheric control of semiconductor manufacturing equipment N2 and air purity control for air separators Oxygen deficiency prevention Oxygen concentration control of glove boxes for research and development and parts machining Oxygen concentration control of experimental clean rooms for environment, fermentation, biochemistry, etc. Continuous measurement of flow gases during food packaging A A A A Application A B A A B A A A X X X X X X X X A A A X X A A A X X A A A X X X X X X X A A B B B B X X X X B X X X X X X X X X X X X X X X X X X X X X X X X B A X B X A X X X X A A A X X A A A X X X X X A B/A X X X A B/A X X X X X X A X B/A A X X X A B/A X X X B A X X X B A Rating: A=Recommended, B=Applicable, X=Not applicable *1: If the sample gas temperature exceeds 700°C, the ZO21P high-temperature probe adapter is required. *2: If explosion-proof is required, use the ZR22S/ZR402G or ZR202S, consult your sales representative or our sales office. *3: If the ZO21P high-temperature probe adapter is used, the sample gas pressure is -0.5 to 5 kPa. Note 1: This Selection Guide should be used as a guide only. If you are not sure of which model to choose, consult your sales representative or our sales office. Note 2: For the detailed specifications of an instrument or the details of combinations of instruments, see note on page 7 General Specification or catalogs to be referred. TI 11A03A01-01E 2nd Edition Nov.10,2011-00   Oxygen Analyzer Selection Guide Tunable Diode Laser Paramagnetic Measuring System TDLS200 MG8G/MG8E Model Specifications 0 – 1 vol% O2 0 – 25 vol% O2 4 – 20 mA DC Ethernet (IEEE 802.3) 0 – 1500°C (*6) 1 MPa or less (*6) 6 sec or less (100% Response time) 0 – 5 vol% O2/ 0 – 1 vol% O2 0 – 25 vol% O2 Settable arbitrarily up to 3 ranges in the measuring range Not available 4 – 20 mA DC 0 – 50°C Atmospheric pressure or more /0 – 7 kPa or more 3 sec or less Min. measuring range Max. measuring range Measuring range setting Partial range Output signal Sample gas temperature Sample gas pressure Response time (90%) (When gas is introduced from the detector inlet) 60 min or less Non-explosion or explosion proof protected Stationary Approx. 3 hr./ 2.5 hr. Warm-up time Non-explosion-proof protected/ Explosionproof construction Flameproof Stationary Application form Not required Required Separately installed sampling system B A B A X X X X A X X B X A B B X X A X A X A A (*5)/A A A (*5)/A A A (*5)/A A A A (*5)/A B B B B B X B X X X X X X X X X X X X Application Package boiler combustion control, gas fired Combustion control of power generation boilers, gas fired Combustion control of pulverized coal boilers Combustion control of hot stoves for steelmaking Heating and combustion exhaust gas control of coke ovens for steelmaking Low-oxygen concentration control of reheating and soaking furnaces for steelmaking Air leakage detection of sintering furnaces for steelmaking Low-oxygen concentration control of CDQ plants for steelmaking Lime kiln combustion control Cement kiln combustion control Combustion control of heating furnaces for oil refinery & petrochemical industry Naphtha cracking furnaces Oxygen concentration control of gas containing a flammable gas Safety control (explosion prevention) at various plants Measurement of trace oxygen concentration in various manufacturing processes City gas quality control Incinerator combustion control Oxygen concentration measurement in oxygen enrichment facilities Oxygen concentration measurement of exhaust gas from activated sludge process equipment Oxygen concentration control of N2 reflow furnaces Atmospheric control of semiconductor manufacturing equipment N2 and air purity control for air separators Oxygen deficiency prevention Oxygen concentration control of glove boxes for research and development and parts machining Oxygen concentration control of experimental clean rooms for environment, fermentation, biochemistry, etc. Continuous measurement of flow gases during food packaging Rating: A=Recommended, B=Applicable, X=Not applicable *5: Inapplicable if explosion-proof is required. *6: Dending on application. Note 1: This Selection Guide should be used as a guide only. If you are not sure of which model to choose, consult your sales representative or our sales office. Note 2: For the detailed specifications of an instrument or the details of combinations of instruments, see note on page 7 General Specification or catalogs to be referred. TI 11A03A01-01E 2nd Edition Nov.10,2011-00  Oxygen Analyzer Selection Guide  n Oxygen Analyzer Selection Flow Chart Oxygen Analyzer Application For semiconductor or electronic component manufacturing process For combustion control or process control OX400 or OX100, OX102 Flammable gas included? Note 1 YES NO Sampling method Direct in-situ With sampling Explosionproof construction required? Explosionproof construction required? YES or NO NO YES TDLS200 MG8E MG8G Note 7 Flameproof type Note 2 General-purpose type Laser Analyzers Paramagnetic Oxygen Analyzers TI 11A03A01-01E 2nd Edition Nov.10,2011-00   Oxygen Analyzer Selection Guide Note: General Specification or catalogs to be referred. ▪ ZR22G, ZR402G: GS 11M12A01-01E, TI 11M12A01-01E ▪ ZR202G : GS 11M12A01-01E ▪ ZR22S, ZR202S : GS 11M13A01-01E ▪ OX400 : GS 11M10B01-01E, Bulletin 11M10B01-01E ▪ OX100, OX102 : Bulletin 11M10A01-03E ▪ MG8G : GS 11P03A03-01E ▪ MG8E : GS 11P03A05-01E ▪ TDLS200 : GS 11Y01B01-01E-A ▪ AV550G : GS 11M12D01-01E Note 1: If the content of a flammable gas is 0.5 % of measuring range or less, select “NO” of flowchart. Note 2: Instruments are all handled as custom orders. Note 3: ZR402G converter must not be located in hazardous area. Note 4: Max. 8 points measurement and averaging. Note 5: Optical path averaging Note 6: ZO21P; High temperature probe adapter Note 7: ATEX Group II for zone 1 (Cat 2G) or zone 2 (Cat 3G) with purge systems YES Averaging measurement ? NO Averaging method Explosionproof construction required? NO Multi points measurement and averaging Note 4 Line averaging Note 5 YES Gas temperature 700°C or less? NO YES ZR22S+ZR402G or ZR202S Note 3 Gas temperature 700°C or less? NO ZR22G+AV550G Note 7 Laser Analyzers YES ZR22S+ZO21P +ZR402G ZR22G+ZR402G or ZR202G Note 3, Note 6 TDLS200 ZR22G+ZO21P +ZR402G Note 6 Zirconia Oxygen Analyzers TI 11A03A01-01E 2nd Edition Nov.10,2011-00  Revision Information ● Title : Oxygen Analyzer Selection Guide ● Manual No. : TI 11A03A01-01E Nov. 2011/2nd Edition Model OX51, OX61 deleted Jun. 2008/1st Edition Newly published TI 11A03A01-01E 2nd Edition Nov.10,2011-00