Dedicated Confined Space Entry Monitor

The QRAE Plus is a full-featured, compact, one-to-four sensor confined space gas detector. Its features include easy-to-change, externally accessed battery packs (available in both alkaline and rechargeable versions) and water-resistant case design. The rechargeable, Lithium-ion battery pack provides up to 20 hours of continuous operation. The QRAE Plus includes 16,000 datalogging points of storage capacity for download to PC compatible with Windows 98, NT, 2000, and XP.

Key Features

Key Features
  • One-to-four plug-in "smart" sensors: Combustible, Oxygen, Hydrogen Sulfide, Carbon Monoxide
  • Optional substance-specific toxic sensors: Sulfur Dioxide (SO2), Nitric Oxide (NO), Nitrogen Dioxide (NO2), Chlorine (Cl2), Hydrogen Cyanide (HCN), Ammonia (NH3), Phosphine (PH3)
  • Rechargeable Lithium-ion battery pack provides up to 20 hours (more than 2 work shifts) of continuous operation
  • Rugged housing withstands use in harsh environments with a water and dust resistant case and strong protective rubber boot
  • Highly resistant to radio frequency and other electromagnetic interference
  • Strong, built-in sample draw pump with optional collapsible sample-probe
  • Also available in diffusion configuration
  • One-button calibration with auto-zero capability
  • Loud audible alarm
  • Bright visual alarm
  • Interchangeable Lithium-ion and alkaline battery packs


  • Confined Space Entry
  • Waste water treatment plants
  • Marine and off-shore oil wells
  • Landfill operations
  • Trenches, silos, railcars
  • Coal mines
  • Cruise ships
  • Sewers and manholes
  • Tunnels
  • Refineries and petrochemical plants, including off-shore drilling and plant shut downs
  • Power plants
  • Pulp and paper industry
  • Steel mills

Product Demo