ZR402G-M-E-E-A-SCT Yokogawa Separate Type Zirconia Oxygen Analyzer Converter 4-20mA
ZR402G-M-E-E-A-SCT Yokogawa Separate Type Zirconia Oxygen Analyzer Converter 4-20mA
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Fast Response
90% response within 5 seconds for real-time combustion control
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Dual Output
Two isolated 4-20 mA DC outputs with selectable ranges
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Rugged Design
IP65 / NEMA 4X enclosure for harsh plant environments
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Product Overview
The Yokogawa ZR402G is a separate type zirconia oxygen analyzer converter engineered for continuous measurement of oxygen concentration in combustion exhaust gas and industrial process gas. Paired with a ZR22G or ZR202G zirconia probe, it delivers stable, high-accuracy O2 readings that help operators optimize combustion efficiency, reduce fuel consumption and lower emissions.
Model ZR402G-M-E-E-A-SCT comes factory-configured with dual current outputs, a backlit LCD with a built-in operator interface, and optional HART communication for seamless integration into DCS and PLC control systems.
Key Features
- Separate type configuration keeps the converter in a safe, accessible location while the probe works in the flue or furnace.
- Zirconia sensor technology with long service life and minimal drift for low maintenance cost.
- Two isolated 4-20 mA DC outputs, each with freely assignable measuring ranges.
- HART 7 digital communication for remote configuration and diagnostics.
- Self-diagnostic functions, sensor failure alarm and calibration history for reliable operation.
- Simple one-touch calibration using instrument air as reference gas.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Separate type zirconia oxygen analyzer (converter unit) |
| Applicable Probe | ZR22G / ZR202G separate type zirconia probe |
| Measuring Range | 0 to 25 vol% O2 standard; 0.01 to 100 vol% O2 selectable |
| Output Signal | Two isolated 4-20 mA DC outputs, max. load 550 Ω |
| Digital Communication | HART 7 protocol (optional) |
| Accuracy | ±1% FS |
| Repeatability | ±0.5% FS |
| Response Time | Within 5 s (90% response) |
| Power Supply | 100-240 V AC, 50/60 Hz / 24 V DC |
| Power Consumption | Approx. 100 VA |
| Ambient Temperature | -20 to 55 °C |
| Structure | IP65 / NEMA 4X, panel and wall mount |
| Display | LCD with backlight and integrated keys |
| Reference Gas | Instrument air (ambient air) |
| Weight | Approx. 4 kg |
Typical Applications
- Boiler and furnace combustion efficiency monitoring
- Cement kiln, glass furnace and metallurgical furnace control
- Refinery and petrochemical process gas measurement
- Waste incineration and emission monitoring systems
Ordering Information
Model: ZR402G-M-E-E-A-SCT — separate type zirconia oxygen analyzer converter. Probes, probe protectors and calibration accessories are available as separate items. Please confirm the full configuration and suffix code before ordering.
Get in Touch
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