Product Description

 Water Vapor Permeability tester
 
 
The GBPI model W**3 has three test chambers with three separate sensors ,and is a self standing instrument . W**0 gives simultaneous test reports ,as all the test chambers have separate sensor .
  Working principle
Water Vapor Permeation Tester was designed with the principle of weighting method to use weight reduction method to test the water transmittance rate (WVTR) of plastic films. Namely in the regulated temperature, relative humidity conditions, the sample two sides keep the vapor different pressure, measuring the vapor volume passed through, figure out the WVTR value. Unit is g/ m2·*4h.