MCG 1200M — Analog/Digital Transmitter

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Overview

MCG 1200M

For terminal operators, process engineers, automation teams, and EPC specifiers who need a safe, reliable way to migrate legacy analog instrumentation into modern digital architectures, the MCG 1200M delivers a flexible, field-proven platform for tank gauging and process integration.
The 1200M digitizes 4–20 mA signals, RTD temperature inputs, pulse meters, and discrete I/O and converts them into industry-standard host protocols—including L&J Tankway, Modbus, HART, WirelessHART, Profibus, and more. Its graphical LCD provides real-time local visualization, while infrared wireless calibration allows secure configuration in hazardous areas without opening the enclosure.
Unlike generic signal converters, the MCG 1200M includes loop power for field instruments, plug-in protocol modules, scalable pulse-handling, and field-upgradeable firmware, making it ideal for both brownfield upgrades and new-build automation. With global hazardous-area certifications and an explosion-proof design, the MCG 1200M ensures safe, long-term performance in refineries, terminals, chemical plants, and SCADA-connected tank farms.
MCG 1200M — Analog/Digital Transmitter

Features

Analog-to-Digital Conversion

Multi-Signal Conversion

Digitizes analog level, temperature, flow, and discrete signals for seamless integration into digital control and inventory platforms.

Infrared Calibration

Infrared Wireless Calibration

Enables safe programming and diagnostics via the MCG 2150 Remote Calibrator—no need to open the enclosure in hazardous areas.

Comprehensive Visualization

Graphical LCD Visualization

Provides clear on-site viewing of level, temperature, pressure, volume, and device diagnostics.

Multi-Protocol Communication

Modular Protocol Support

Plug-in modules allow support for Tankway, Modbus, HART, WirelessHART, Profibus DP, Enraf emulation, and other site standards.

Smart Flash Technology

Built-In Loop Power

Provides 24 VDC excitation for connected sensors, reducing external power supplies and simplifying installation.

Multi-Protocol Support

Field-Upgradeable Firmware

Supports “on-the-fly” protocol updates and new functions without hardware replacement or service disruption.

Graphite Displacer Reliability

Explosion-Proof and Globally Certified

Certified for UL, CE, and ATEX hazardous locations for safe, compliant installation worldwide.

Details

Typical Applications

  • Tank Integration: Digitizes legacy gauge signals for compatibility with modern inventory systems and SCADA platforms.
  • Temperature Monitoring: Accepts 3-wire RTDs and average-temperature probe inputs, supporting custody-transfer temperature correction.
  • SCADA Connectivity: Adds analog, RTD, pulse, and discrete sensors to central control systems without extensive rewiring.
  • Hazardous-Area Installations: Infrared configuration allows safe setup and diagnostics without opening the explosion-proof housing.
  • Mixed-Sensor Facilities: Unifies readings from multiple sensor types—pressure, temperature, level, magnetostrictive, pulse flowmeters—into a single digital interface.
  • Pulse-Based Metering: Supports pulse-per-unit, totalized counts, and rate measurements for flow, batch, and utility metering systems.

Technical Specifications & Key Features

Table Header Table Header
Display
Local graphical LCD display
Inputs
Supports up to 4x 4–20 mA, 2x pulse, 3-wire RTD (copper/platinum), and discrete I/O (up to 8).
Outputs
Up to 2x 4–20 mA; digital protocols include L&J Tankway, Modbus, HART, WirelessHART, Profibus DP, and legacy system emulations.
Power Options
12–70 VDC; can provide 24 VDC loop power to connected devices.
Enclosure Rating
UL Class I, Groups B, C, D; Class II Groups E, F, G; Class III. ATEX II 2 G EEx d IIB; II 2 D.
Programming
Wireless IR calibration via MCG 2150 Remote Calibrator.

Documents and Downloads

Product Flyer

Have a look at the flyer to get all the tech specs and product features. Brochure

User Manual

Read the manual for detailed information and instructions. Manual

Calibrations

Check out a sample cert from our calibration lab. Certificate

Contact Support

If you have a question that we have not covered then just get in touch and we’ll be happy to help.

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FAQs

We have tried to answer the most common questions we are asked here.

The MCG 1200M enhances safety by allowing configuration and maintenance to be performed wirelessly via an infrared remote. This eliminates the need for technicians to open the explosion-proof housing or work directly on the device in a hazardous environment. The local graphical display also provides essential data at a glance, reducing the need for personnel to climb tanks or enter restricted areas.

Yes, the MCG 1200M is designed to be highly compatible. It can take standard 4-20mA signals from various types of sensors, including ultrasonic and magnetostrictive probes, as well as pressure transducers, allowing it to serve as a universal interface for a diverse range of field devices.

The MCG 1200M’s flash memory allows for new or updated programming to be downloaded “on-the-fly.” This means you can update communication protocols or add new features without taking the transmitter out of service, which saves time, reduces downtime, and ensures your system remains flexible for future upgrades.

Yes. Infrared programming allows full setup and calibration in hazardous areas.
Yes, the 1200M supplies 24 VDC loop power for connected field instruments.
Yes, new features and protocol updates can be loaded without removing the device from service.
Yes. UL, ATEX, and CE approvals support global deployment in Class I/Div. 1 environments.