Flame & Gas Detection Systems

Sierra Monitor Product Pic

sierra monitor

Sierra Monitor Corporation has over 30 years of experience designing, manufacturing and supplying intelligent hazardous fire and gas detection systems worldwide. From inception, Sierra Monitor has combined information and instrumentation technologies to provide comprehensive solutions required by instrument and safety engineers to protect life and property. 

Sierra Monitor combines intelligent fire and gas detectors with controllers that provide timely status enabling safety professionals to react quickly to changing conditions. From the first Sentry controller released in 1986 to today’s powerful Sentry IT System, Sierra Monitor has been a leader in intelligent hazardous gas detection systems, smart single-point fixed gas detectors and a broad range of flame detectors.

Product Highlights

Sentry IT

Sentry IT Fire & Gas System 

  • Comprehensive hazardous gas detection monitoring system
  • Multiple input types & multiple communications options
  • User configurable alarm logic
  • Easy interface to plant wide systems


sierra monitor smart gas detector

Smart Gas Detectors 

  • Available for IR Combustibles / Catalytic Combustibles / Toxic & Oxygen / Solid State H2S / Carbon Dioxide
  • FM approval for both performance and safety
  • SIL-2 Certified (for selected gas models)
  • Long calibration interval for reduced maintenance
  • HART interface / Modbus RTU serial interface
  • Remote sensor option mounting up to 100 ft away from transmitter
2 wire gas detector SMC

2-Wire Gas Detectors

  • Latest in loop-powered gas detection
  • Fastest response time, highest accuracy and specifications
  • Non-intrusive calibration
  • Application adaptability with variable range selection and rotatable pace plate to enable mounting of the sensor module in various orientations
  • 2-wire toxic gas detector series requires minimal maintenance, continuous self-diagnostics and non-intrusive calibration


Spectrex Logo

Spectrex Inc. is a leader in fire and gas detector designs by continuously committing development resources for your safety, the safety of your employees, capital investments and to the environment.

Spectrex an innovator in the field, setting trade standards, and continuously strives to the address the needs of the high risk - high value industries for reliable and unique solutions that provide effective protection against fires and explosions.

Product Highlights

Triple IR SMC

Flame Detection - Triple IR Sensor

  • Triple Spectrum Design for long distance detection and high false alarm immunity
  • Most durable and weather resistant flame detector
  • Lower power requirements, compact & lighter design
  • SIL-2- TUV approval

Flame Detection - UV / IR Dual Sensor

Flame Detection - UV Sensor



 Spextrex Safeye Quasar 950


SafEye Quasar 950/960 Open Path Gas Detector *NEW*

  • Quasar 950 detects Hydrogen Sulphide Gas
  • Quasar 960 detects toxic Ammonia gas
  • Solar blind & immune to industrial environments
  • High Senstivity & Fast Response
  • SIL-2 - TUV (pending)
SafEye Open Path Gas Detector

SafEye Quasar 900 Open Path Gas Detector

  • Most reliable Open Path Gas detection for all weather conditions
  • Latest open IR path technology and detects a wide range of hydrocarbon gases, including alkane, ethylene and methane to hexane
  • Employs "spectral fingerprint" analysis of the atmosphere using the Differential Optical Absorption Spectroscopy (DOAS) technique
  • SIL-2 - TUV (pending)

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