YOKOGAWA ZR22G040SECRME/CV

YOKOGAWA ZR22G040SECRME/CV

The model code ZR22G040SECRME/CV encodes the complete configuration of the detector. Based on Yokogawa’s EXAxt ZR series model code conventions, here is the detailed breakdown:

Code explanation details:

ZR22G – Detector series designator. ZR22G denotes the general-purpose separate-type probe compatible with ZR402G, ZR802G, and AV550G converters-12.

040 – Probe length suffix. Available lengths for the ZR22G series include -015 (0.15 m, high-temperature), -040 (0.4 m), -070 (0.7 m), -100 (1.0 m), -150 (1.5 m), -200 (2.0 m), -250 (2.5 m), -300 (3.0 m), -360 (3.6 m), -420 (4.2 m), -480 (4.8 m), and -540 (5.4 m). The 040 length is optimal for standard industrial ductwork where moderate insertion depth is required-12.

S (Wetted Material) – Denotes SUS316 stainless steel construction for all gas-wetted components. SUS316 offers excellent corrosion resistance for most industrial combustion flue gases.

E (Flange Type) – Specifies DIN PN10 DN50 A SUS304 flange standard. Yokogawa offers multiple flange options including ANSI Class 150, JIS, JPI, and Westinghouse standards to accommodate various global mounting requirements.

C (Reference Gas) – Pressure compensated reference air. This configuration maintains accurate oxygen measurement even when flue gas pressure exceeds +5 kPa. Pressure compensation ensures proper reference gas flow against elevated backpressure-12.

R (Gas Connection) – Rc 1/4 female taper thread for reference gas and calibration gas connections. Alternative options include 1/4 NPT female and G1/2 threads.

M (Connection Box Thread) – M20 × 1.5 metric thread for detector electrical cable entry. Other available options include Pg 13.5, G1/2, and 1/2 NPT.

E (Manual Language) – English-language instruction manual.

/CV (Option Code) – Check valve option. /CV specifies the inclusion of check valves in the reference gas line to prevent backflow of flue gas into the reference air supply. This option is particularly important when instrument air is used as the reference source and flue pressure may fluctuate or become positive-23.

Other Common ZR22G Configurations

For reference, Yokogawa offers numerous ZR22G variants to match different application requirements:

ZR22G-040-S-C-C-R-M-E – Natural convection reference air (no external supply), DIN flange

ZR22G-040-S-K-C-T-M-E-A – JIS 10K 65 FF flange, natural convection, 1/4 NPT connections-39

ZR22G-100-S-C-E-T-Q-E-A – 1.0 m probe length, instrument air reference-20

ZR22G-040-S-F-E-T-T-E-A – 0.4 m with 1/4 NPT gas connection-

ZR22G-150 series – 1.5 m length for deeper duct penetration

Installation and Operating Requirements

Probe Mounting

The ZR22G detector can be mounted horizontally or vertically. For probes with insertion lengths of 2.5 meters or greater, vertical mounting (within ±5° of vertical) is required. For probes 2.0 meters and shorter, horizontal orientation is acceptable. High-temperature probes with silicon carbide (SiC) material must be mounted vertically.

Flange Compatibility

The detector supports multiple flange standards:

JIS (5K, 10K, various diameters)

ANSI Class 150 (2″, 3″, 4″)

DIN PN10 (DN50, DN80, DN100)

JPI Class 150

Electrical Connections

Detector signal cable: 6-core shielded cable with 2-way resistance ≤ 10 Ω

Heater cable: 2-core cable, heat-resistant to ≥80°C

Grounding: Protective earth resistance ≤ 100 Ω; shield connected to converter FG terminal

Calibration

Calibration gases:

Zero gas: 0.95–1.0 vol% O₂ balanced with N₂

Span gas: Dry, clean air (dew point ≤ –20°C)

Flow rates: Calibration gas 600 ± 60 ml/min; reference gas 800–1,000 ml/min

Calibration modes available through ZR402G/ZR802G converters:

Manual – Using ZO21S or ZA8F units

Semi-automatic – Panel or contact input initiation

Automatic – Scheduled calibration via ZR40H automatic calibration unit

Applications and Industries

The ZR22G040SECRME/CV and related ZR22G series detectors are deployed across:

Iron and steel – Sinter plants, blast furnaces, reheating furnaces, annealing lines

Electric power – Coal-fired and gas-fired utility boilers, HRSG systems

Oil and petrochemical – Process heaters, reformers, cracking furnaces, sulfur recovery units

Cement manufacturing – Rotary kilns, preheaters, calciners

Pulp and paper – Recovery boilers, lime kilns, power boilers

Glass manufacturing – Glass melting furnaces, forehearths

Food processing – Industrial boilers, thermal oxidizers

Waste incineration – Municipal and hazardous waste combustion monitoring

Technical Support and Documentation

Complete technical documentation for the ZR22G series is available including:

General Specifications (GS 11M12A01-01E)

Instruction Manual (IM 11M12A01-02E)

Technical Information documents

The detector is designed for simple installation, operation, and maintenance, with all consumable components field-replaceable to maximize uptime.

Summary

The Yokogawa ZR22G040SECRME/CV represents a robust, field-proven solution for continuous oxygen measurement in combustion processes. With a 0.4 m probe length, pressure-compensated reference air system, and all-stainless steel wetted construction, this ZR22G detector delivers accurate, repeatable performance in demanding high-temperature environments. Combined with Yokogawa ZR402G or ZR802G converters, the ZR22G040SECRME/CV enables precise low-oxygen combustion control, energy savings, and reduced emissions for industrial facilities worldwide.

For a complete oxygen analyzer system, pair the ZR22G040SECRME/CV with a ZR402G converter (LCD touchscreen, HART communication) or ZR802G converter (enhanced data logging and digital communication features).