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Draeger Sulfur Dioxide Diffusion Tubes 5/a-D
Range: 0.7 - 150 ppm x h

5 - 150 - 1 hour
2.5 - 75 - 2 hour
1.3 - 38 ppm - 4 hour
0.7 - 19 ppm - 8 hour

**No Sample Pump is Required**