The Millennium II M21 Single Channel Transmitter is a universal fixed gas detection transmitter designed for reliable single-point gas monitoring in industrial and hazardous locations. Built for use with combustible and toxic gas sensors, the M21 supports infrared, catalytic bead, and electrochemical sensor technologies, making it a flexible solution for facilities that need dependable gas detection across a wide range of applications.
Designed for day-to-day stability in demanding environments, the M21 combines low power consumption, digital sensor communication, long-range sensor separation, and multiple output options in one rugged transmitter. Sensors are pre-calibrated and automatically recognized by the transmitter, allowing the correct gas curve and configuration profile to be uploaded quickly during setup.
With its full-character OLED display, non-intrusive menu access, event logging, and support for analog, relay, Modbus® RS485 RTU, and HART® communication options, the Millennium II M21 Transmitter helps simplify installation, calibration, and integration into both new and existing gas detection systems.
Available in BC, AB, SK, and MB through Westech Industrial, the M21 is a strong choice for industrial facilities looking for a reliable single-channel gas detection transmitter backed by local technical support and service expertise.
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Description
Universal Single-Channel Gas Monitoring
The Millennium II M21 Single Channel Transmitter is designed for fixed gas detection applications that require one reliable monitoring point. Its universal design allows it to support a wide range of toxic and combustible gas sensors, making it a flexible option for industrial facilities with varying gas detection requirements.
Broad Sensor Compatibility
The M21 is compatible with infrared, catalytic bead, and electrochemical sensor technologies. It supports Net Safety SC3 Series combustible gas sensors and ST3 Series toxic gas sensors, allowing operators to configure the system for the specific gas hazards present at their site.
Smart Sensor Recognition
Sensors are pre-calibrated and automatically recognized by the transmitter once connected. The M21 uploads the sensor’s specific gas curve and configuration profile, helping simplify setup and reduce the potential for configuration errors during installation or sensor replacement.
Long-Range Sensor Separation
For applications where the sensor needs to be installed away from the transmitter, the M21 supports remote sensor separation of more than 2,000 ft / 600 m. This provides added installation flexibility in hazardous areas, hard-to-access locations, or applications where the transmitter needs to be mounted in a more convenient location.
Clear OLED Display and Easy Menu Navigation
The M21 features a full graphic OLED display that is easy to read in a variety of ambient lighting conditions. The intuitive menu system supports English, French, Portuguese, and Spanish, making setup, operation, and calibration straightforward for field personnel.
Flexible Communication and Output Options
The transmitter is designed to integrate with both legacy and modern gas detection systems. Standard 4–20 mA analog output is available, with optional relay outputs, Modbus® RS485 RTU, and HART® communication depending on the selected configuration.
Low Power, Reliable Operation
With low power consumption and a wide voltage range, the M21 is designed for stable operation in industrial environments, including remote or power-limited installations. Digital communication between the sensor and transmitter helps support fast response times and dependable monitoring.
Built for Harsh Industrial Environments
Available in aluminum or stainless steel enclosure options, the M21 is built for demanding industrial conditions. It offers strong environmental protection, hazardous location certification options, and field-proven sensor technologies designed to perform in challenging applications.
Applications
The Millennium II M21 Single Channel Transmitter is designed for fixed gas detection in industrial environments where combustible or toxic gas hazards may be present. Common applications include oil and gas facilities, chemical processing plants, mining operations, utilities, wastewater treatment facilities, industrial manufacturing sites, power generation facilities, and other hazardous locations requiring reliable single-point gas monitoring.
The M21 is well suited for applications where the sensor must be mounted remotely from the transmitter, where multiple communication options are required, or where an existing fixed gas detection system needs to be upgraded without a complete system redesign.
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No matter how extreme or demanding the conditions, your people and facilities come first. That is why Emerson is dedicated to offering the most comprehensive and advanced flame and gas detection technologies available. Our flame and gas monitoring systems are designed to excel under the toughest conditions to help you streamline day-to-day operations and, more importantly, keep your people safe.
Website: https://www.emerson.com
