Draeger Carbon Dioxide Diffusion Tubes 500/a-D
Range: 65 - 20,000 ppm x h

500 - 20,000 ppm - 1 hour
250 - 10,000 ppm - 2 hour
125 - 5,000 ppm - 4 hour
65 - 2,500 ppm - 8 hour

**No Sample Pump is Required**