For use in hazardous environments, QRAE II pump is full-featured, compact, 1–4 sensor toxic gas detector for oxygen, combustibles, hydrogen sulfide, carbon monoxide, or sulfur dioxide. CSA- and ATEX-certified unit can be powered by either rechargeable Li-ion batteries or standard alkaline batteries, and includes vibration, flashing LED, and 95 dB audible alarms. Available in water-resistant case, confined space entry monitor supports 8 languages.