YOKOGAWA ZR402G-M-E-E-A Oxygen Analyzer Converter | Panel Mount, 4-20mA, HART, ATEX

YOKOGAWA ZR402G-M-E-E-A Oxygen Analyzer Converter | Panel Mount, 4-20mA, HART, ATEX

YOKOGAWA ZR402G-M-E-E-A converter specifications. Zirconia oxygen analyzer converter, panel mount, 4-20mA+HART output, ATEX certified.

Product Overview

The YOKOGAWA ZR402G-M-E-E-A is a microprocessor-based converter designed for use with ZR22G series zirconia oxygen analyzer probes. It supplies power to the probe, processes the oxygen concentration signal, and provides a 4-20mA DC analog output with superimposed HART digital communication. This model features ATEX hazardous area certification, panel mount configuration, and universal power supply.

Technical Specifications

Key Features

• ZR22G Probe Compatible:​ Dedicated converter for YOKOGAWA ZR22G series zirconia oxygen probes

• HART Communication:​ 4-20mA analog output with superimposed HART digital protocol

• Panel Mount Design:​ Standard 1/4 DIN cutout for control room or panel installation

• ATEX/IECEx Certified:​ Suitable for installation in hazardous areas (Zone 1/2, 21/22)

• Integrated Probe Power Supply:​ Directly powers ZR22G probe heater and sensor

• Automatic Calibration Control:​ Built-in logic for external solenoid valve unit

• Large Backlit LCD:​ Clear local display of oxygen concentration, cell temperature, and diagnostic messages

• Dual-Range Capability:​ Configurable for two independent measurement ranges with automatic switching

• **​ Multi-Language Display:​ Interface supports multiple languages

Applications

• Control room or panel-mounted converter for ZR22G in-situ zirconia probes

• Flue gas oxygen monitoring in boilers, furnaces, and process heaters

• Combustion efficiency optimization in power plants and industrial facilities

• Refineries, petrochemical, cement, and waste incineration plants

• Hazardous area installations requiring ATEX/IECEx certified converters

Important Notes

1. Model interpretation:​

   • ZR402G​ = Converter series

   • M​ = Panel mount (1/4 DIN)

   • E​ = HART output

   • E​ = ATEX/IECEx hazardous area certification

   • A​ = 100-240V AC universal power supply

2. A compatible ZR22G series oxygen probe​ must be ordered separately.

3. For automatic calibration, an external solenoid valve unit (e.g., ZR20H) and calibration gases are required.

4. HART communication​ requires minimum loop resistance of 250Ω.

5. Panel cutout​ dimension: 92 × 92 mm (+1.0/ -0.5 mm).

6. Maximum cable length​ between converter and ZR22G probe must not exceed 100 meters (refer to instruction manual).

7. The converter supports oxygen measurement​ in percent concentration (0.01 to 100% O₂).