Coulometric Method for Measuring Contact Lenses Oxygen Permeability

Product Description

Product FeaturesNote1

• Equipped with Labthink self-developed coulometric sensor conforming to ASTM D3985, intrinsic standard and no calibration is required
• Support temperature control to satisfy tests under different conditions (optional)
• Built-in high-quality stainless steel test cell with better sealing performance
• Imported manual isolation valve and flow regulator are adopted for better sealing performance and lower failure rate
• Industrial computer appearance design, small size and fast cooling
• Reference film is provided for quick calibration
• The system adopts single-chip microcomputer control and can run independently
• The test report can be exported in common formats such as EXCEL and PDF
• Support micro printer, automatically print test data (optional)
• Equipped with RS232 data interface, which can be connected to computer software for curve analysis, data storage, report printing, etc. (optional)
• The gas purifier independently developed by Labthink can remove trace oxygen in nitrogen and provide oxygen-free carrier gas (optional).

Standard

ASTM D3985ASTM F1307GB/T 19789GB/T 31354DIN 53380-3JIS K7126-2-BYBB 00082003-2015

Applications

Basic Applications
Films Plastic films, paper-plastic composite films, coextruded films, aluminized films, aluminum foils, aluminum foil composite films, glass fiber aluminum foil composite films and many others
Sheeting PP, PVC and PVDC sheets, metal foils, rubber pads, silicon wafers and other sheeting materials
Packages Plastic, rubber, paper, paper-plastic composite, glass and metal packages, e.g. bottles, peanut oil packages,  materials, vacuum bags, metal three-piece cans, plastic packages for cosmetic, soft tubes for toothpaste, jelly and yogurt cups
Extended Applications
Closure Systems Oxygen barrier property of various closure systems for bottles cartons and pouches.
Solar Back-Sheets Oxygen permeability test of solar back-sheets
Plastic Tubes Oxygen permeability test of various sorts of tubes, e.g cosmetic tubes.
Blister Packs Test oxygen transmission rate of the whole blister packs
Automotive and Small Engine Fuel Tanks Permeability of plastic fuel tanks.
Battery Plastic Shell Oxygen transmission rate of battery plastic shell

Technical Specifications

Table 1: Test Parameters Note1

Parameter		Model C230H
Test Range	cm3/(m2d) (Standard)	0.01 200
	cc/(100in2day)	0.0007 12.9
	cm3/(pkgd)(Package)	0.00005 1
Resolution	cm3/(m2day)	0.001
Repeatability	cm3/(m2day)	0.01 or 2%
Test Temperature	C	10 55 0.2
Test Humidity	RH	O2: 0%, 5% 901%, 100% Carrier Gas: 0%, 5% 902%(optional)
Additional Functions	Package Test (3L Max.)	Optional
	DataShieldTM Note2	Optional
	Computer System required by GMP	Optional
	CFR21 Part11	Optional

Table 2: Technical Specifications

Test Chamber	3 test chambers
Specimen Size	108 mm X 108 mm
Specimen Thickness	3 mm
Standard Test Area	50 cm2
Carrier Gas	99.999% High-purity Nitrogen (outside of supply scope)
Carrier Gas Pressure	0.28 MPa/40.6psi
Port Size	1/8 inch metal tubing

Advanced Coulometric Sensor Technology

Equipped with a high sensitivity coulometric sensor, this apparatus ensures precise oxygen permeability measurements for diverse contact lens materials. The technology minimizes noise and interference, allowing reliable evaluation of both hydrogel and silicone hydrogel lenses over a broad range of test conditions. Its automatic calibration with standard films secures consistent, traceable results every cycle.


User-Friendly Operation and Versatile Data Management

A configurable control interface and microprocessor-based digital control make operations straightforward. Data can be stored on internal memory or seamlessly exported via USB, while an RS232 interface supports integration with external systems. The Windows-compatible software delivers comprehensive analysis and easy report generation for both laboratory and industrial quality control environments.


Designed for Safety, Compliance, and Efficiency

The device is engineered with built-in pressure relief and over-temperature protection, assuring safe operation. It surpasses ISO 18369-4 and ASTM F1307 standards, making it a dependable choice for international testing requirements. Its adjustable test speed and multi-specimen capacity boost productivity without compromising measurement precision.