The QRAE II is a full-featured, compact, one- to four-sensor gas detector for detection of combustibles, oxygen, hydrogen sulphide, and carbon monoxide. 

Key features include easy-to-change, externally accessed battery packs (available in rechargeable and alkaline versions), a water-resistant case and a new state-of-the-art O2 sensor technology with extended life.

The rechargeable Lithium-ion battery pack provides up to 14 hours of continuous operation.

The QRAE II includes storage capacity for 64,000 data logging points, which can be downloaded to any PC compatible with Windows 98, NT, 2000 or XP.