Oxygen tester C401H

O2water vaporOTR

Overview
The C401H Oxygen and Water Vapor Transmission Test System integrates a coulometric oxygen sensor and an infrared water vapor sensor to measure OTR and WVTR of medium- and high-barrier materials. Designed to meet standards such as ASTM D3985, ASTM F1249 and ISO 15106-2, it is suitable for films, packaging and sheets used in pharmaceuticals, food, medical devices, chemicals, photovoltaics and electronics.

Product features (summary)

• Combined OTR+WVTR instrument with switchable modes: OTR+WVTR, OTR-only, WVTR-only.
• Single sample mounting supports sequential combo tests to avoid cross-contamination.
• Independent film and package test cells in one cabinet for consistent conditions and reliable comparisons.

Core competence: Coulometric oxygen sensor

• ppb-level coulometric oxygen sensor delivering a low detection limit.
• Absolute-value test principle according to ASTM D3985; no routine calibration required.
• Extended service life compared with traditional coulometric sensors.
• High oxygen absorption efficiency within the specified range.

Core competence: Infrared water vapor sensor

• Infrared water vapor sensor designed to ASTM F1249.
• Non-consumable design for long service life and built-in over-limit alarm and protection.

Multi-dimensional temperature and humidity control

• 360° airflow circulation constant-temperature technology for stable temperature control.
• Automated carrier gas flow and temperature control during testing for improved accuracy.
• NIST-based humidity generation principle for constant humidity.
• High-precision temperature and humidity sensors for real-time monitoring and recording.
• System repeatability can reach 0.01 cc/(m2·day).

Testing flexibility (films and packaging)

• Independent film and package tests within the same cabinet; dual-function test cell enables fast switching.
• Automatic clamping for even force and reliable sealing, reducing time and operational risk.

Intelligent control system

• 10" medical-grade touchscreen with desktop OS for a simple interface.
• Fully automated testing with automatic data saving and intelligent alerts.
• Embedded functions: calendar, multi-language switching, multi-level access control and network port for remote access and upgrades.

Multi-instrument collaborative management

• Optional platform software for single-computer control of multiple instrument hosts.
• Centralized data management with real-time display of transmission rate, transmission coefficient, temperature and humidity curves.
• Professional test mode and optional GMP-compliant data traceability and DataShield™ integration.

Low-carbon and energy-saving

• Variable-frequency control technology and low-energy components for reduced power consumption.
• Instrument can operate independently without a computer, lowering laboratory setup and operating costs.

Testing principle
The pretreated sample is clamped between two chambers. Oxygen or carrier gas with stable humidity flows on one side and high-purity nitrogen on the other. Molecules diffusing through the sample are carried to the sensor by the nitrogen flow. Sensor concentration data are analyzed to calculate OTR, WVTR and related results.

Reference standards
ASTM D3985, ASTM F1307, GB/T 19789, GB/T 31354, DIN 53380-3, JIS K7126-2, YBB 00082003-2015; ASTM F1249, ISO 15106-2, GB/T 26253, JIS K7129, YBB00092003-2015

Test applications (selected)

• Films: OTR and WVTR testing for various plastic films, composite films, co-extruded films, metallized films and foil laminates.
• Packaging: OTR/WVTR testing for bottles, pouches, cans, boxes and drums made of plastics, paper composites, glass and metal (pharmaceutical, beverage, food and cosmetic packaging).
• Sheets: OTR/WVTR testing for PP, PVC, PVDC, metal foil and silicon wafers.
• Extended: caps, LCD films, solar backsheets, pipes, medical blisters, sterile dressings and battery housings.

Technical specifications (key)

• Model: C401H
• Test range (film, standard area 50 cm2): OTR 0.01–200 cc/(m2·day); WVTR 0.005–50 g/(m2·day)
• Package range: OTR 0.00005–1 cc/(pkg·day); WVTR 0.00002–0.25 g/(pkg·day)
• MASK area 5 cm2 (optional): OTR 0.2–2000 cc/(m2·day); WVTR 0.2–500 g/(m2·day)
• Resolution: 0.0001 (units respective)
• Repeatability: OTR 0.01 cc/(m2·day) or 1% (whichever greater); WVTR 0.005 g/(m2·day) or 2%
• Temperature range: 15–50 °C; fluctuation ±0.2 °C
• Humidity range: 0%, 35%–90% ±2% RH
• Sample thickness: ≤ 3 mm
• Test area: 50 cm2; film size 10.6 × 10.6 cm
• Carrier gas: 99.999% nitrogen (user-supplied); gas source pressure ≥ 280 kPa
• Dimensions: 68 × 40 × 68 cm; net weight 75 kg
• Power supply: 120 VAC ±10% 60 Hz or 220 VAC ±10% 50 Hz
• Standard configuration: instrument host, sampler, vacuum grease, Φ4 mm polyurethane tube; optional GP-02, software, computer, DataShield™, GMP/CFR21 Part 11.