PERMATRAN-W 1/50 WVTR Analyzer

The PERMATRAN-W 1/50 G analyzer is MOCON’s entry level instrument for WVTR testing.

  • Water Vapor Permeation Analyzer
  • Test Films
  • Complies with ASTM E398
  • 1 Cell Cartridge System
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The PERMATRAN-W 1/50 G is designed for low cost barrier testing for Water Vapor Transmission Rate (WVTR) on films from low to high barriers. It features a removable horizontal test cartridge offering easy sample preparation and an integrated control system with digital display and touch keypad.


High Accuracy

  • Reliable high sensitivity RH sensor meeting ASTM E398
  • Detection levels down to 0.1 g/(m2*day)
  • Controlled humidification on both test and carrier gas

Easy to use

  • Removable test cartridges allow fast easy sample preparation
  • Fully automated temperature, flow and RH controls simplify testing
  • Automated test method can start a test by a single press of a button
  • Customize and store up to 99 pre-determined test methods

The PERMATRAN-W 1/50 G analyzer is designed to be easy to use and provides reliable accurate test results. Designed for both first-time users and the advanced operator this analyzer provides very accurate and repeatable test results within a wide detection range from 0.1 to 100 g/(m2*day).


The upper detection limit can be extended to 1,000 g/(m2*day) with the use of a 5 cm2 masking.


The instrument is easy to use with features such as removable horizontal test cartridge, digital display with advisory screen prompts for operator inputs, and fully automated testing providing reliable results with minimal training. The compact footprint and integrated control system require less space than other WVTR instruments.


For more than 25 years, MOCON’s PERMATRAN series of instruments have been the most trusted and longest lasting on the market. The PERMATRAN-W 1/50 G is the cost-effective option for laboratories looking to start in-house permeation testing.

Removable Cartridges
  • Easy sample prep on the benchtop
  • More consistent loading
  • One button release and loading
  • Pneumatic clamping provides more repeatable results
Automated Control Features
  • Flow, Temp, & RH control
  • Test report printing and export
  • Sensor Protection from over ranging and shortening sensor life
Digital Display with Keypad Interface
  • Intuitive automated operation requires less training
  • Set and Go automatic RH controls
  • Advisory screen prompts operator inputs
  • Integrated controls save on valuable lab space by eliminating need for PC
High Sensitivity RH Sensor
  • Dynamic RH measurement method for accurate results
  • Long sensor life
  • Accurate and repeatable results
  • Reliable RH sensor that complies with ASTM E398
  • Full 100% parts and workmanship warranty for 12 months
PERMATRAN-W 1/50 OTR Analyzer Units
Temperature Control Range 10 °C to 40 °C ± 0.2 °C
Humidity Control, Film Cell, Test Gas 100% and 35% to 90% RH ± 3 RH
Test Range, (50 cm2) 0.1 to 100 g/(m2 • day)
0.00645 to 6.45 g/(100in2 • day)
Test Range, Masked (5 cm2) 1.0 to 1000 g/(m2 • day)
0.0645 to 64.5 g/(100in2 • day)
Resolution, Film 0.001 g/(m2 • day)
Repeatability, Film +/-0.05 or 2% whichever is greater
Film Size 4” x 4” Std
Film Thickness Up to 120 Mil
Film Test Area 50 cm2

Physical Specifications

  • 17”x11”x18” (43.2 x 27.9 x 45.7 cm)
  • 49 Lbs. (22.2 kg)

Electrical Requirements

  • Voltage: 100 – 240 VAC 50/60 Hz
  • Maximum Power Draw: 300 VA
Laboratory Requirements
Temperature Operation 22 °C ± 2 °C
Storage 10 °C to 30 °C
Humidity Operation 20% to 80% RH (non-condensing)
Storage 5% to 85% RH (non-condensing)
Gas Supply Requirements
Carrier Gas Gas Composition Nitrogen (99.7% N2 or better)
Supply Pressure, Nominal 30 PSI, (2.06 Bar), (206 kPa)
  • Serial Printer Port RS-232
  • USB 2.0 port (for connection of memory device or computer)
Compliance Standards

This product is UL and CSA listed using the ETL mark from Intertek Group plc. and is certified to conform to CE.

Conforms to the following internationally recognized safety standards.

  • IEC 61010-1: Second Edition:2001
  • UL 61010-1: Second Edition:2004
  • CAN/CSA-C22.2 No. 61010-1-12 Second Edition:2004

Conforms to the following internationally recognized EMC standards.

  • EN 61326-1:2006
    • Class A Radiated & Conducted
    • Basic Immunity Test Requirements
  • EN 61000-3-2:2006
  • EN 61000-3-3:1995, A1:2001, A2:2003

Conforms to EU Directive 2011/65/EU RoHS Compliance.

Cartridges & Options
  • Additional cartridges for staged samples
  • Cert Films 1-3 & set
  • Masks
  • None
Service & Support Options
  • Basic Preventative Maintenance Plan
  • Plus Preventative Maintenance Plan

Packaging Films

  • Monolayer
  • Multi-layer
  • Coated Films
  • Coated Paper/paperboard
Test Standard Compliance
  • ASTM E398
  • ISO 15106-1
  • GB/T 30412-2013
Test Methodology

Following ASTM E398-13

Standard Test Method for Water Vapor Transmission Rate of Sheet Materials Using Dynamic Relative Humidity Measurement

Summary of Test Method

The specimen is mounted between two chambers, one of relatively high relative humidity and the other of relatively low relative humidity. After conditioning and isolation of chambers, the rate at which the moisture increases within the relatively low relative humidity chamber over a predetermined range of interest is measured. This rate is compared to the rate for a calibration sample (calibrated gravimetrically) and the WVTR is determined.