Draeger Ammonia Diffusion Tubes 20/a-D
Range: 2.5 - 1,500 ppm x h

20 - 1500 ppm - 1 hour
10 -750 ppm - 2 hour
4 -300 ppm - 5 hour
2.5 - 200 ppm - 8 hour

**No Sample Pump is Required**