Specifications
| principle | Built-in slide tube |
| Scope of application | paper |
| Inner cylinder diameter | 3 inches |
| tube Weight | 20 ounces |
| Pressure (water column height) | 4.88 inches |
| test area | 1.0S square inch (0.01, 0.25S square inch optional) |
| "Air resistance" range | 2.0-2000 seconds (0.2-200, 0.5-500 seconds) |
| Breathable sample gas Volume | 100cc |
| equivalent second | 0.00156；0.00833；0.025；0.0625；0.10；0.25；1；25 |
| Gross Weight | 12-17lbs |
Packing list
host X1, manual X1, certificate X1, warranty card X1
After-sales instructions
Warranty days: 365 days
[Note] For after-sales services outside the Chinese mainland, if the instrument requires repair, the shipping and possible associated taxes shall be borne by the sender. Generation address of the manual: http://en.nbchao.com/p/34176/Specification.html , which is only used by users who purchase commodities from the NBCHAO.