Mercury Monitoring with the MET-80CL

• Dual-range high-precision thermal mass flow meters (no mechanical dry gas meters)
• Patented tool-free and easy-exchange sorbent trap probe
• National Instruments CompactRIO (cRIO) logic controller for reliable operation and hassle-free integration with plant data acquisition and handling systems (DAHS)
• The latest METRIC™ software, which provides powerful features such as stack flow mapping to maintain system uptime
• Automated flow meter calibration while the system is in operation to maintain high data availability

The MET-80 is the only industry-proven, turn-key sorbent trap mercury monitoring system (STMMS) that is designed and manufactured specifically for long-term mercury monitoring using sorbent trap sampling. Since the introduction of the MET-80 in 2007, several companies have tried to imitate it by assembling similar systems from “off-the-shelf” stack testing components. However, no one can match the experience and performance of the MET-80.

The traps are held in place using a positive, leak-free connecting system designed for easy, tool-free, and rapid exchange of the traps between sampling periods.

The latest MET-80CL probe includes the following enhancements over previous models:

• Sorbent trap holders that accommodate the use of sorbent traps of various lengths
• Upgraded heater to maintain temperature setpoint in wet flue gas applications
• Stack thermocouple protection via C-276 Hastelloy or 316L Stainless Steel sheathing
• Trap shield for wet stack applications
• High-density heater wrap (traps) to maintain consistent heating throughout trap length
• Removable end cap to allow easier repair when needed 

All MET-80CL components are enclosed in a compact insulated industrial fiber-glass enclosure (24”x48”x16”) which can be easily installed as a wall-mounted application or on the supplied stand. The insulated enclosure is NEMA4X – rated and environmentally controlled to accommodate the most extreme operating conditions. The insulated cabinet and air conditioning system is an improvement from the previous MET-80 model as it performs very well in interior stack platform installations where potential temperature extremes exist (e.g. >120°F). 

• Prop+ sampling mode – algorithm to maintain a user-defined SFSR
• Custom alarm communication through Modbus
• Custom alarm and operating settings – system reliability
• Pre-configured sampling profiles (Long term sampling or RATA mode)
• On-screen keyboard
• SMART stack flow input management to avoid invalid operation
• Comprehensive operating display
• Customer friendly and intuitive interface
• Maintenance Mode – real-time raw system readings and control capabilities
• Fully automated calibration
• Scanner functionality for sorbent trap ID input
• Alarm history feature

CleanAir’s MET-80 Calibration Kit includes a NIST-traceable volumetric flow reference standard, which fully integrates with the MET-80CL. The METRIC software package automates the entire calibration process, allowing simple, quick volume auditing without taking the system offline. This ensures high data availability throughout the calibration process.