Water Vapor Permeation Rate Tester With Weighing Method Permeability Testing Machine Machine Weight: 30 Kilograms (Kg)

About Water Vapor Permeation Rate Tester With Weighing Method Permeability Testing Machine :

Application :
WVTR-398B is based on the humidity sensor detection method and available for the water vapor permeability test of heat exchange membranes, nonwoven fabrics and flexible barrier materials.

Features :
Features weighing method
Dual weighing modules, patent technology
18 specimens, continuously test
One-button test, test automatically in whole process
Multiple test modes optional
Temperature and humidity auto control
Data curves display
Computer control
Environment temperature and humidity sensor inside
Unit based on embedded system, 24bit AL AD
Traceable reference film calibration
Supports DSM system (DSM, lab data management system)

Principles:
The specimen is clamped between the upper and lower chamber, the upper chamber is high humidity side, and the other side of specimen, lower chamber is purged by a stream of dry gas, due to the effect of water concentration gradient at two sides of the specimen, water molecules will permeate through the specimen into the dry gas side, penetrated water molecules will be carried to the relative humidity sensor which generates the proportional signal, so water vapor transmission rate will be obtained by calculating the sensor signal.

Technical indexes :
Resolution : 0.001 g/m2A.24h
Specimen amount : 1 specimen
Temperature range : 5C 95C
Temperature accuracy : A 0.1C
Humidity range : 100%RH (Standard)
Humidity accuracy : A 1%RH
Test area : 38 cm2 (Standard)
Thickness less : 3mm
Carrier gas : Dry Air, or 99.999% Nitrogen
Carrier flow : 0~200 ml/min
Gas interface : 1/8inch
Dimension : 330mm(L) * 600mm(D) * 330mm(W)