Nextteq Benzene Gas Detector Tubes. Options:

Benzene Detector Tubes
Measuring Range 1-25ppm, 2-50ppm, 4-100ppm
10 tubes, 10 tests per box
P/N NX111M

Benzene Detector Tubes
Detection Range 0.1-7.5ppm, 0.2-15ppm, 1-75ppm
5 tubes per box. Dehumidifier Tube included
P/N NX111L

Benzene Detector Tubes
Detection Range 0.2-1ppm, 1-80ppm
5 tubes per box (Dehumidifier tube included)
P/N NX111H