QRAE Plus Four-Gas Confined Space Gas Detector Advanced and Compact Four-Gas Confined Space Gas Detector The QRAE Plus is a full-featured, compact, two- to four-sensor confined space gas detector. Key features include easy-to-change, externally accessed battery packs (available in both alkaline and rechargeable versions) and a water-resistant case. 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 any PC compatible with Windows 98, NT, 2000 and XP. Rugged housing with stands use in harsh environments • Water- and dust-resistant case • Strong protective rubber boot Applications Additional Advantages • Landfill operations Key Features • One-button calibration with auto-zero capability Refineries and petrochemical plants including off-shore drilling and plant shutdowns • Loud audible alarm Power plants • Bright visible alarm Pulp and paper industry • Interchangeable Lithium-ion and alkaline battery packs Steel mills One to four plug-in “smart” sensors • Combustibles • Oxygen • Hydrogen sulfide • Carbon monoxide Confined Space Entry • Waste-water treatment plants • Marine and off-shore oil wells • Highly resistant to radio-frequency and other electromagnetic interference • Trenches, silos, railcars • Strong, built-in sample draw pump draws up to 100 feet (30 meters horizontally or vertically) • Cruise ships • Also available in diffusion configuration • Coal mines • Sewers and manholes • Tunnels Optional 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 of continuous operation ATEX SSIFIE LA D www.raesystems.com C ver 4_11.05 ISO 9001 CERTIFIED

QRAE Plus Specifications * Detector Specifications (continued) Sensor Specifications Gas Monitor Range Oxygen 0-30.0% 0.1% Combustible 0-100% LEL 1% LEL Carbon Monoxide Hydrogen Sulfide Sulfur Dioxide Nitric Oxide Nitrogen Dioxide Chlorine Hydrogen Cyanide Ammonia Phosphine 0-500 ppm 0-100 ppm 0-20.0 ppm 0-250 ppm 0-20.0 ppm 0-10.0 ppm 0-100 ppm 0-50 ppm 0-5.0 ppm Hazard Area • US and Canada: UL, CSA (pump only), Approval Classified as Intrinsically Safe for use in Class I, Division I Groups A, B, C, D, T3C Resolution 1 ppm 1 ppm 0.1 ppm 1 ppm 0.1 ppm 0.1 ppm 1 ppm 1 ppm 0.1 ppm Approval Temperature...