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Draeger Trichloroethylene Diffusion Tubes 200/a-DRange: 25 - 1,000 ppm x h200 - 1,000 ppm - 1 hour100 - 500 ppm - 2 hour 50 - 250 ppm - 4 hour 25 - 125 ppm - 8 hour
**No Sample Pump is Required**