Designed for personal protection the Drager Pac 3500 and Drager Pac 5500 measure the concentration of oxygen, carbon monoxide or hydrogen sulfide in the air. The Drager Pac 3500 has a lifespan of approximately two years and the Drager Pac 5500 has an unlimited lifespan with proper maintenance and servicing. Both instruments use minimal battery power and need low maintenance resulting in a low cost of ownership.
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