YOKOGAWA ZR40H-T-M-A S1 Oxygen Analyzer Converter | HART, ATEX, Wall Mount, Enhanced Firmware

YOKOGAWA ZR40H-T-M-A S1 Oxygen Analyzer Converter | HART, ATEX, Wall Mount, Enhanced Firmware

YOKOGAWA ZR40H-T-M-A S1 converter specifications. Zirconia oxygen analyzer converter, HART output, ATEX certified, wall mount, S1 version with advanced diagnostics.

Product Overview

The YOKOGAWA ZR40H-T-M-A S1 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 analog output with superimposed HART digital communication. This ATEX/IECEx certified model features a rugged wall-mount enclosure and the S1 enhanced firmware version with advanced diagnostics and calibration functions.

Technical Specifications

Key Features

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

• HART Communication:​ 4-20 mA analog output with digital HART protocol for remote configuration and diagnostics

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

• S1 Enhanced Version:​ Advanced firmware with predictive maintenance, extended diagnostics, and historical calibration data logging

• Automatic Calibration Ready:​ Built-in logic for external ZR20H automatic calibration solenoid valve unit

• Integrated Probe Power:​ Directly powers ZR22G probe heater (cell temperature regulated to 750°C)

• Large Backlit LCD:​ Real-time display of O₂ concentration, cell temperature, and maintenance alerts

• Rugged Enclosure:​ IP66/NEMA 4X aluminum housing for harsh industrial and outdoor environments

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

Applications

• Converter unit for ZR22G in-situ zirconia probes in combustion control systems

• Flue gas oxygen monitoring in utility and industrial boilers (coal, oil, gas, biomass)

• Process heaters in refineries, petrochemical, and chemical plants

• Cement and lime kiln atmosphere monitoring

• Waste-to-energy and incineration plant combustion control

• Hazardous area installations requiring ATEX/IECEx certified equipment

Important Notes

1. Model interpretation:​

   • ZR40H​ = Converter series

   • T​ = HART communication output

   • M​ = ATEX/IECEx hazardous area certification

   • A​ = 100-240V AC power supply

   • S1​ = Enhanced version with advanced firmware and diagnostics

2. A ZR22G series oxygen probe​ must be ordered separately as a matched component.

3. For automatic calibration, the optional ZR20H automatic calibration unit and calibration gases are required.

4. HART communication​ requires minimum loop resistance of 250 Ω and a HART-compatible host.

5. The S1 version firmware provides predictive maintenance alerts​ (cell impedance trend, heater degradation).

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

7. The converter stores calibration history​ for up to 100 events, accessible via HART or local display.