OX-TRAN 1/50 OTR Analyzer

The OX-TRAN 1/50 analyzer is MOCON’s entry level instrument for OTR testing.

  • Oxygen Permeation Analyzer
  • Test Films
  • Complies with ASTM D3985
  • 1 Cell Cartridge System
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The OX-TRAN 1/50 analyzer is designed to be easy to use and provides reliable accurate test results. 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 Oxygen sensor meeting ASTM D3985
  • Detection levels down to 0.1 cc/(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 OX-TRAN 1/50 is a low-cost unit designed for testing Oxygen Transmission Rate (OTR) on films from low to high barriers. 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 200 cc/(m2*day).


The upper detection limit can be extended to 2,000 cc/(m2*day) with the use of a 5 cm2 masking or using atmospheric oxygen in place of the normal 100% O2 (factor of 4.8).


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 OX-TRAN series of instruments have been the most trusted and longest lasting on the market. The OX-TRAN 1/50 a 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 Coulometric SensorAccurate and repeatable results
  • Reliable Coulometric sensor that complies with ASTM D3985
  • Full 100% parts and workmanship warranty for 12 months
Temperature Control Range 10 °C to 40 °C ± 0.5 °C
Humidity Control, Film Cell, Test Gas 5% to 90% RH ± 3 RH
Test Range, Film, Unmasked
(50 cm2)
0.1 to 200 cc/(m2 x day)

0.0065 to 12.9 cc/(100in2 x day)

Test Range, Film, Masked
(5 cm2)
1.0 to 2000 cc/(m2 x day)

0.065 to 129 cc/(100in2 x day)

Resolution, Film 0.001 cc/(m2 x 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 100% Nitrogen (purity 99.9%)
Supply Pressure, Nominal 32 PSI, (2.2 Bar), (220 kPa)
Test Gas Gas Composition 100% Oxygen (purity 99.9%)
Supply Pressure, Nominal 32 PSI, (2.2 Bar), (220 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 D3985
ASTM F2622
ASTM F1927
ISO CD 15105-2
JIS K-7126-2
DIN 53380-3
GB/T 19789-2005
GB/T 31354-2014

Test Methodology

Following ASTM D3985

Standard Test Method for Oxygen Gas Transmission Rate Through Plastic Film and Sheeting Using a Coulometric Sensor

The test specimen is mounted as a semi-barrier between two chambers at ambient atmospheric pressure. One chamber is slowly purged by a stream of nitrogen and the other chamber contains Oxygen. As Oxygen permeates through the film into the nitrogen carrier gas, it is transported to the coulometric detector where it produces an electrical current, the magnitude of which is proportional to the amount of oxygen flowing into the detector per unit of time.

Related Material:
White Paper – Comparison of ASTM D3985 and ASTM F2622