Draeger Nitrogen Dioxide Diffusion Tubes 10/a-D
Range: 1.3 - 200 ppm x h

10 - 200 ppm - 1 hour
5 - 100 ppm - 2 hour
2.5 - 150 ppm - 4 hour
1.3 - 25 ppm - 8 hour 

**No Sample Pump is Required**