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Det-Tronics LS – 2000
Line-of-Sight Infrared (LOS IR) Gas Detectors provide continuous monitoring of combustible hydrocarbon gas concentrations in a wide range (typically, 0 to 5 LFL-meters, over a distance of 5 to 120 meters).
They must function under the heavy vibration typical of an industrial site and must endure harsh environments.

To meet these requirements while minimizing lifecycle costs can be challenging. The FlexSight™ LS2000 sets a new standard for LOS IR gas detectors with improved optical field of view, an advanced housing design, simplified mount, and breakthrough alignment tolerance.
Det-Tronics LS – 2000


Operating Voltage
24 Vdc nominal. Operating range is 18 to 30 Vdc.
Available Gases
Third party performance approved to methane, butane,
±5% of full scale gas concentration or ±10% of applied gas
Temperature Range
–55°C to +75°C
Measurement Range
0-5 LFL-meters.
Module Housing Material
316 stainless steel (CF8M)


  • ± 0.8 degree misalignment tolerance (~±56cm @ 40m; ~±168cm
  • @ 120m)
  • IR source: High performance, long lasting xenon flashlamp - 10
  • year warranty on IR source
  • Large detection coverage area (detection range 5–120 meters)
  • Maximum distances and proper operation verified with 95% signal
  • obscuration
  • Global compliance to FM6325, ISA-12.13.04, EN 60079-29-4, and
  • IEC 60079-29-4 performance standards
  • Certified SIL 2 capable
  • Third party performance certified and factory calibrated to
  • Methane, Butane, and Propane
  • Microprocessor controlled heated optics for increased resistance
  • to moisture and ice
  • Standard 4–20 mA output (configurable), HART communication,
  • RS-485 Modbus
  • Optional alarm relays (Ex d only)
  • Mounting hardware and alignment brackets included
  • Mounts to pole (4.5” nominal OD) or flat surface
  • Built-in locking adjusters deliver fine control of alignment angles


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