Gas Monitors

Gas Monitors provide much needed safety for confined spaces. Allwest has the monitor style and type for your specific job application.

Our experts in underground utility equipment will help you select the best gas monitor for your needs. We have helped serve many contractors through our local offices in the greater Seattle and Portland areas of Washington and Oregon. We can also ship items nationwide.

Contact us at 1-800-828-8505 or order an online catalog.

Allwest Monitors

Bio Systems Gas Monitors


Undeground Utility Gas Monitor


 Allwest Underground

Multi Gas Monitors

Biosystems:  MultiPro Gas Monitor

  • Compact and rugged
  • One button operation
  • Easy to read front mounted backlit display
  • Over-molded boot
  • Meets IPX5 standard
  • Automatic event logger (20 events, including sensor type, max, average, time and duration).
  • One button auto calibration
  • Calibration due reminder
  • Interchangeable alkaline or rechargeable (Li-Ion) versions

Biosystems:  IQ Express Docking Station Gas Monitor


  • Automatic instrument identification
  • Automatic battery test
  • Automatic alarm tests (audible, visible, vibrating)
  • Automatic bump test
  • Automatic calibration (if necessary)
  • Automatic record keeping
  • Automatic ready/fault indication
  • For advanced features connection to PC via USB or Ethernet

GFG:  G 450


  • Auto Cal automatic calibration
  • O2, H2S, CO, and combustible gases
  • Rugged design, dust highly water resistant
  • 24 hours of continuous operation
  • Extra large, invertible, heterochromatic display
  • Alkaline or Rechargeable battery's





MultiPro Gas Monitor

IQ Express Docking Station Gas Monitor

G 450 Gas Monitor

Allwest Underground

Single Gas Monitors

Micro 3 Series

  • Detection capability - Carbon Monoxide, Hydrogen Sulfide or Oxygen
  • Available with or without display
  • Visual and audible alarms (91db)
  • 3 Factory set alarm points
  • Extremely portable (2”x31/2”x1”)
  • Extremely lightweight (4 ounces)
  • Auto calibration
  • Low Maintenance


          Micro III Single Gas Monitor

Allwest Underground

Fixed Location Gas Monitors

Control Unit

  • Single panel control unit
  • Accepts signals from up to 4 remote sensors
  • Multi-Functional relay outputs for machinery shut off, alarming, etc.
  • Bar graph display to indicate alarm and operational status
  • Adjustable alarm thresholds throughout entire detection range
  • Measurement, alarm and service data can be easily downloaded

Remote Sensors

  • EX-proof (Intrinsically safe)
  • Digital Display
  • Stand alone capability




Fixed Location Gas Monitor

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