What is the Water vapor transmission Cabinet：
Textile Lab researcher should know that water vapor transmission Cabinet important for cloth . Moisture permeability can reflect the performance of sweat and steam. It is one of the important indicators to identify the comfort and hygiene of clothing.
Water vapor transmission Cabinet machine is applied to measure the permeability of various textiles and non-woven fabric (including space cotton and bat wool)..So many manufacture and inspection Lab need this machine to test the cloth related performance
Today we give brief to introduce this machine .Wish you can get more detailed.
Definition Water vapor transmission：
Water vapor transmission is the rate of water transmission through a material of a constant thickness at a given time. Water Vapor Transmission is calculated using the formula: WVT = G / t A= (G / t) / A (G=weight gain; t=time tested; A=area of the test area or dish opening)Two of the methods to test the water vapor transmission of a material are desiccant (dry cup) and water (wet cup). These two tests are similar in setup but the service conditions are different and the results are not comparable in any way. The dry cup is designed to simulate a heated dry building during a pouring rain, measuring the drive into the building. The water, or wet, cup measures the vapor drive moving in the opposite direction.
FYI (Fanyuan Instumrent ) is one of the best suppliers to offer these devices .There are two methods , desiccant and water method. FYI is keen on this field 30years . The machine with fully Stainless steel, control device are imported overseas .
At present marketing seldom supplier can keep the humidity accuracy ±3% . while FYI can supply the machine keep such humidity accuracy and with reasonable price
Water vapor transmission tester：
Specifications:
Temperature Range 20℃~ 80℃
Humidity range: 30% ~ 98%RH
Temperature fluctuation: ±5℃
Temperature uniformity: ±2℃
Humidity deviation: -3%~+2%RH
Cooling rate: 7 ~ 1℃/min(without load)
Heating rate: 2~3℃/min(without load)
Rotary speed: 10 times/min
Circulation wind speed: 3~3m/s
Power supply AC220V,50HZ
Structure：
Temperature and humidity controller
Air velocity regulator
Power switch
Filler
Water level indicator
Air inlet
Handle
Observing window
