Standards:

Applications:

Many applications of porous materials require very low vapor permeability through the material. These applications are found in many industries, including biotechnology, health care, pharmaceuticals, food, and packaging, environmental, and power box chemicals. The determination of the low current rate of the material used in these applications is an important condition for assessing the process.
Applicable industry:
Biotechnology & healthcare pharmaceutical paper
Non-woven fuel cell textiles
 

Product Information:

Introduction

Principles
The basic principle is based on the law of diffusion.
F = -m [dp/dx]
F is the flow through the sample, [dp/dx] is the pressure gradient through the thickness of the sample, and M is the measurement of diffusion rate.
The instrument is designed to accurately measure pressure and flow rate. The sample room is empty, and the steam is kept under constant pressure on the side of the sample, and the pressure is increased on the other side of the sample. According to the pressure gradient, the data is used to calculate the steam penetration rate per unit area per unit area.

Features
◆ The sample chamber is maintained at a constant temperature for yielding reliable and reproducible data.
◆ Fully automated
◆ Very little operator involvement
◆ Test time: Can be as little as a few minutes
◆ Robust. Minimal maintenance
◆ Measurable flow rate. As low as 10^-4 cm³/s
· Application test: water vapor permeability, gas permeability, diffusion permeability
· Operating conditions: raise temperature, high pressure, many steam test
· Non destructive
· The automatic control
 
Technical Parameters
 

Items	Parameters
Pressure Range	0-100psi(others available)
Resolution	1/60000
Intrusion Volume Range	0-50cc(others available)
Intrusion Volume Resolution	0.01cc
Sample Size	1.5" diameter, 1" thick (others available)
Pore Size	1000 µm - 0.06 µm