DescriptionDrager Ammonia 2/a Detection Tubes measure NH3 gas from 2 to 30 ppm. These short-term tubes work with the Accuro Gas Detection Pump for on-the-spot measurements in various workplace settings. Each pack contains 10 tubes with a 2-year shelf life.Key features:Reaches difficult areasQuick measurements (10 seconds to 15 minutes)Useful for workplace concentration checks and confined space entry