Nextteq LLC is offering Gastec Pumps and Tubes for air sampling in oil and gas health, safety and risk management. Nexteq Pumps and TubesThe pump and tube system uses a piston pump and pre-calibrated, direct-read colorimetric detector tubes. The company touts its requirement of fewer pump strokes and delivery of faster results than leading competitors. Detector tubes are available for more than 600 applications. Nextteq has Gastec detector tubes for Benzene, Toluene, Ethyl Benzene, Xylene, and Hydrogen Sulfide.