General Introduction

Yokogawa IR202 Infrared Gas Analyzer measure concentration of CO2, CO, CH4, SO2, and NO components in process gas by using the non-dispersive infrared method (NDIR), while measuring O2 with the paramagnetic or zirconia method, maximum of 4 components including O2 (or up to 3 components without O2 measurement) are simultaneously measurable, one high-sensitivity mass flow sensor is employed in the detection unit for the infrared method. A single beam system for measurement makes maintenance easy and ensures high stability for a long period of time. The microprocessor-based IR202 has a large liquid crystal display and features easy operation, high accuracy, and multiple functions that make it optimal for measuring combustible gas from boilers and incinerators.


Measurable Gas Components and Ranges 

Component

IR202-A

IR202-B

IR202-C

IR202-D

Min. range

Max. range

Min. range

Max. range

Min. range

Max. range

Min. range

Max. range

NO

0-500ppm

0-5000ppm

―

―

0-50ppm

0-5000ppm

0-200ppm

0-5000ppm

SO2

0-500ppm

0-5000ppm

0-500ppm

0-5000ppm

0-50ppm

0-5000ppm

0-200ppm

0-10vol%

CO2

0-500ppm

0-100vol%

0-500ppm

0-100vol%

0-50ppm

0-5000ppm

0-100ppm

0-100vol%

CO

0-200ppm

0-100vol%

0-500ppm

0-100vol%

0-50ppm

0-5000ppm

0-200ppm

0-100vol%

CH4

0-1000ppm

0-100vol%

0-1000ppm

0-100vol%

―

―

0-500ppm

0-100vol%

O2 (Built-in paramagnetic)

0-5vol%

0-100vol%

―

―

0-5vol%

0-100vol%

0-5vol%

0-100vol%

O2 (Dedicated Zirconia)

0-5vol%

0-25vol%

―

―

0-5vol%

0-25vol%

0-5vol%

0-25vol%


3.Model Selection

Main Code

Suffix Codes

Description

IR202
















Infrared Gas Analyzer

Type

-A















19 inch rack mounting   type

-B















Wall mounting type

-C















Low-concentration   19inch rack mounting type

-D















19 inch rack mounting   D-Sub terminal type

Measurable

Component

-A














NO

-B














SO2

-C














NO+SO2

-D














CO

-E














CO2

-F














CO2+CO

-G














NO+CO

-H














NO+SO2+CO

-K














CH4

-L














CH4+CO

-M














CO2+CH4

-P














CO2+CO+CH4

O2 Analyzer

N













Without O2 Analyzer


1













External Zirconia type   O2 Sensor (ZX8D)


2













External O2 Analyzer


3













Built-in paramagnetic   type O2 Sensor

Measuring range

for NO


-NN












Not available



-01












Min. 0-50ppm / Max.   0-500ppm



-02












Min. 0-100ppm / Max.   0-1000ppm



-03












Min. 0-200ppm / Max.   0-2000ppm



-04












Min. 0-250ppm / Max.   0-2500ppm



-07












Min. 0-500ppm / Max.   0-5000ppm

Measuring range for

SO2



-NN











Not available




-01











Min. 0-50ppm /Max.   0-500ppm




-02











Min. 0-100ppm /Max.   0-1000ppm




-03











Min. 0-200ppm /Max.   0-2000ppm




-04











Min. 0-250ppm /Max.   0-2500ppm




-06











Min. 0-500ppm /Max.   0-2500ppm




-07











Min. 0-500ppm /Max.   0-5000ppm




-08











Min. 0-1000ppm /Max.   0-5000ppm




-09











Min. 0-1000ppm/ Max.   0-1 %




-10











Min. 0-2000ppm/ Max.   0-2 %




-11











Min. 0-5000ppm/ Max.   0-5 %




-12











Min. 0-1 % / Max. 0-10   %

Measuring range for CO2




-NN










Not   available





-01










Min.   0-50ppm / Max. 0-500ppm





-02










Min.   0-100ppm / Max. 0-1000ppm





-03










Min.   0-200ppm / Max. 0-2000ppm





-04










Min.   0-250ppm / Max. 0-2500ppm





-07










Min.0-500ppm   / Max. 0-5000ppm





-09










Min.0-1000ppm/   Max. 0-1 %





-10










Min.0-2000ppm/   Max. 0-2 %





-11










Min.0-5000ppm/   Max. 0-5 %





-12










Min.0-1%/   Max. 0-10%





-13










Min.0-2%/   Max. 0-20%





-14










Min.0-3%/   Max. 0-25%





-15










Min.0-5%/   Max. 0-50%





-16










Min.0-10%/   Max. 0-100%

Measuring range for CO





-NN









Not available






-01









Min. 0-50ppm/ Max.   0-500ppm






-02









Min. 0-100ppm/ Max.   0-1000ppm






-03









Min. 0-200ppm/ Max.   0-2000ppm






-04









Min. 0-250ppm/ Max.   0-2500ppm






-07









Min. 0-500ppm/ Max.   0-5000ppm






-09









Min. 0-1000ppm/   Max.0-1%






-10









Min.0-2000ppm/   Max. 0-2 %






-11









Min.0-5000ppm/   Max. 0-5 %






-12









Min.0-1%/   Max. 0-10%






-13









Min.0-2%/   Max. 0-20%






-14









Min.0-3%/   Max. 0-25%






-15









Min.0-5%/   Max. 0-50%






-16









Min.0-10%/   Max. 0-100%

Measuring range for CH4






-NN








Not   available







-07








Min. 0-500ppm/ Max.   0-5000ppm







-09








Min. 0-1000ppm/   Max.0-1%







-10








Min.0-2000ppm/   Max. 0-2 %







-11








Min.0-5000ppm/   Max. 0-5 %







-12








Min.0-1%/   Max. 0-10%







-13








Min.0-2%/   Max. 0-20%







-14








Min.0-3%/   Max. 0-25%







-15








Min.0-5%/   Max. 0-50%







-16








Min.0-10%/   Max. 0-100%

Measuring range for O2







N







Not   available








1







0-5/10vol%








2







0-5/25vol%








3







0-10/25vol%








4







0-5vol%








5







0-10vol%








6







0-25vol%








7







0-50vol%








8







0-100vol%

Analog Output








-1






0-1V DC, non-isolation









-4






4-20mA DC, non-isolation

Piping









R





Rc1/4










T





1/4NPT

Language










J




Japanese











E




English











C




Chinese

Power Cable











-NN



None   (Terminal block for power supply)












-JA



Rated   voltage 125V AC (PSE)












-US



Rated   voltage 125V AC (UL)












-EU



Rated   voltage 250V AC (CEE)












-CN



Rated   voltage 250V AC (CCC)

Display












-A


Rack mounting with   Slide rail













-B


Panel mounting













-C


Wall mounting













-D


Rack mounting

―













-N

Always N

―














N

Always N

Options















/K

O2 correction output
















/A

Peak count alarm output
















/C

RS-485 communication
















/U

Conversion of unit   (mg/m3, g/m3)