Draeger Formaldehyde Short Term Gas Detector Tubes. Options:

Draeger Formaldehyde Detector Tubes 0.2/a
P/N 6733081
Measuring Range: 0.2 - 5 ppm
(10 tubes, 10 tests per box)

Draeger Formaldehyde Activation Tubes - Use with Drager 6733081 to extend measuring range to 0.04ppm
P/N 8101141

Draeger Formaldehyde Detector Tubes 2/a
P/N 8101751 
Measuring Range: 2 - 40 ppm
(10 tubes, 10 tests per box)