Fabric water vapour permeability testing apparatus

Fabric water vapour permeability testing apparatus is for assessment of the water vapour permeability ability of fabrics by moisture permeable cup moisture absorption method. The instrument is used to determine moisture (steam) permeability of various types of fabrics (including moisture-permeable coated fabrics) as well as cotton and space cotton for non-woven clothing. Moisture permeability can reflect the perspiration and steam permeability of clothing, one of the important indicators to identify the comfort and hygiene of clothing.

Application
The instrument is used to determine moisture (steam) permeability of various types of fabrics (including moisture-permeable coated fabrics) as well as cotton and space cotton for non-woven clothing.

Standards
IOS 12704.1-2009 Textiles-Test Methods for Water Vapor Transmission of Materials-Part 1: Moisture absorption method.
IOS 12704.2-2009 Textiles-Test Methods for Water Vapor Transmission of Materials-Part 2: Evaporation method.
ASTM E96-00 Standard Test Methods for Water Vapor Transmission of Materials
BS7209:1990 Specification for water vapour permeable apparel fabrics.

Model B/C Fabrics Water Vapour Permeability Testing Apparatus:
Consist of the main box with the refrigeration system and instrument control cabinet.
Wind speed adjustable.
The United States standard square moisture permeable cups for thick samples and circular moisture permeable cups for thin samples, four cups for each type;
3 GB standard moisture permeable cups.
PID self-tuning temperature / humidity control device.
Digital timer.
Start timer button / stop timer button.

Features
Model A Fabrics Water Vapour Permeability Testing Apparatus:
The instrument has a PID self-tuning temperature / humidity control device (with a high precision PT100 sensor). Temperature and humidity can be set on the instrument panel as needed.
Digital timer.
Double insulated glass door and test chamber with pure stainless steel inner tank.

Technical Parameters

Items	Parameters
Temperature range	5℃～40℃plusmn;0.5℃ higher than the ambient temperature (without refrigeration )
Humidity range	Indoor relative humidity～90%RH
Temperature accuracy	Indicating valueplusmn;2%
Test time	0～99.99h
Heating power	700W
humidification amount	ge;250mL/h
Power supply	AC220V，50Hz

Model A Fabrics Water Vapour Permeability Testing Apparatus

Items	Parameters
Temperature range	20℃～40℃plusmn;0.5℃
Humidity range	（50plusmn;2）%RH～（90plusmn;2）%RH
Airflow velocity	0.02m/s～0.3m/s
Test time	0～99.99h
Heating power	600W
Humidification amount	ge;250mL/h
Power supply	AC220V，50Hz
Note: ASTM E96-00 standard specifies test temperature at 21℃～32℃plusmn;1℃； Recommended test temperature and humidity conditions: 1、General test: temperature (23plusmn;1)℃, relative humidity (50plusmn;2)%RH 2、High temperature and high humidity test: temperature (38plusmn;1)℃, relative humidity (90plusmn;2)%RH