NIOSH Releases Updated Permeation Calculator Tool

Published September 27, 2017

The NIOSH National Personal Protective Technology Laboratory (NPPTL) has released a new version of the Permeation Calculator, a software program for analyzing chemical permeation test data. The tool works for both closed-loop and open-loop permeation testing, and is intended to help industrial hygienists and researchers avoid performing labor-intensive permeation parameter calculation by hand. According to NIOSH, the Permeation Calculator can also help prevent inconsistency among different experimenters and ensure identical permeation parameters from a particular permeation test data file.

The latest version of the Permeation Calculator, version 3.0.0, runs on both Windows and macOS. Version 3.0.0, which is capable of reading data files in the latest Excel format, also features an updated graphical user interface.

“Data analysis for chemical protective clothing permeation testing involves a number of equations and experimental factors,” NIOSH’s Permeation Calculator page reads. “Experimenter bias and possible calculation errors are critical issues when determining permeation parameters, including various breakthrough times, steady-state permeation rate, cumulative permeation, [and] average permeation rate.”

The Permeation Calculator is available for download from NIOSH’s website.