![7501](https://img.petfoodindustry.com/files/base/wattglobalmedia/all/image/2015/02/pfi.7501.png?auto=format%2Ccompress&q=70&w=400)
Mocon Inc. offers a water vapor transmission rate line, called Permatran-W Model 3/33 series. Units in the Model 3/33 series offer automatic relative humidity capability via a software interface. The Permatran-W series tests the water vapor transmission rate of films as well as finished flexible and rigid plastic-based packaging. A modulated infrared probe is incorporated within the test cell for RH testing along with a high-precision temperature sensor, the company says.