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Boreal Stack/Duct
Laser Based – Stack/Duct Gas Monitoring is an Enhanced Sensing Element that thrives where Traditional Gas Detection technologies do not survive.

The Stack/Duct (SDX) Probe used with Boreal Laser’s line of GasFinder3 Based Instruments is primarily used in process monitoring & control applications for its quantitative performance in difficult applications, fail-safe design for safety critical applications, and its maintenance friendly operation.
Boreal Laser Based – Stack/Duct Gas Monitoring


Hazardous Area Certification
(A)Ex ib IIC (T5) Tamb <70°C Gb (Equivalent to Class 1 Zone/Division 1, Groups: A,B,C,D)
Operating Temperature
-45 to 70°C (-49 to 158°F)
Process Connection
3” 150# Raised Face Flange Bolt-Up Pattern
Power & Communication
24 VDC, HART 7 (over 4-20mA), Dry-Contact Relays, and MODBUS
Beam Block
Operates down to 97% Obscuration (40x Turndown) with Status Indication and Time Delay
Ten (10) Years on Laser Light Source and Three (3) Year Standard Warranty


  • Challenging Applications: Ideal for high temperature, high humidity, and high/continuous gas exposure applications
  • Robust Light Source: Long-lasting Near Infrared laser light source used as sensing element
  • Maintenance Friendly: Due to the Internal Reference Cell, there is no field calibration or intervention required or available
  • Speed of Response: New and independent result every single second
  • Fail-Safe Design: Sophisticated diagnostics with no undisclosed failure modes