Contact Lens Oxygen Permeability Tester

The Contact Lens Oxygen Permeability Tester (Polarography Method) is a precision instrument designed to measure the oxygen permeability (Dk) of soft and hard contact lenses, hydrogel, silicone hydrogel, and other high oxygen permeability materials. The instrument provides accurate, repeatable measurements critical for lens manufacturers, laboratories, and research institutions. A complete measurement setup typically includes the main host, electrode assembly frame, electrodes, central thickness gauge, and a controlled temperature and humidity environment, ensuring compliance with international and national standards.

Application

(1) Measurement of oxygen permeability of soft contact lenses (hydrogel, silicone hydrogel).

(2) Evaluation of oxygen permeability in rigid or hard contact lenses.

(3) Quality control of contact lenses in manufacturing facilities.

(4) Research and development of new lens materials with enhanced oxygen permeability.

(5) Verification of compliance with regulatory standards for ophthalmic products.

(6) Laboratory testing of lens prototypes for performance evaluation.

Standards

(1) ISO 18369 – Ophthalmic optics – Contact lenses – Requirements and test methods.

(2) GB/T 11417 – Contact lens oxygen permeability measurement.

(3) ANSI Z80.20 – American National Standard for Contact Lens Oxygen Permeability.

(4) ISO 9913-1 – Ophthalmic materials – Oxygen permeability of polymer materials.

(5) ISO 9913-2 – Ophthalmic materials – Polarographic method for Dk measurement.

Features

(1) Dual input design supports simultaneous measurement of two test electrodes.

(2) Polarographic measurement ensures high accuracy and reproducibility.

(3) Compatible with soft, hard, hydrogel, silicone hydrogel, and other high Dk lenses.

(4) Complete system integration with host, electrode assembly, central thickness gauge, and temperature/humidity control.

(5) Precision temperature control (0.0–50.0°C) with 0.1°C resolution and ±0.2°C accuracy.

(6) Adjustable electrode excitation voltage (0.750 VDC) for polarographic measurements.

(7) Current measurement range with multiple gear options for low- and high-permeability lenses.

(8) Compact and portable design suitable for laboratory use.

Technical Parameters

Parameter	Specification
Dual Input	Supports 2 test electrodes simultaneously
Power Supply	210–250V AC, 5 W
Temperature Control	0.0–50.0°C (Resolution 0.1°C, Accuracy ±0.2°C)
Electrode Excitation Voltage	0.750 VDC
Electrode Specifications	Gold cathode Ø4 mm; Silver anode inner Ø5.75 mm, outer Ø12.75 mm
Size (W×D×H)	356 × 190 × 102 mm
Current Zero Adjustment	0–100 nA
Current Measurement Gears	19.99 nA (±10 pA), 199.9 nA (±100 pA), 1.999 μA (±1 nA), 19.99 μA (±10 nA), 199.9 μA (±100 nA)

Accessories

(1) Electrode assembly frame with two electrode slots.

(2) Gold cathode and silver anode electrodes.

(3) Central thickness gauge for accurate lens measurement.

(4) Constant temperature and humidity chamber.

(5) Calibration and adjustment tools.

(6) User manual and compliance certificates.

Test Procedures

Connect the electrodes to the dual input ports.

Place the lens sample in the electrode assembly frame.

Measure the central thickness of the lens using the thickness gauge.

Set the temperature and humidity to the desired test conditions.

Adjust the electrode excitation voltage to 0.750 VDC.

Zero the current using the current zero adjustment.

Start the polarographic measurement and record the current response.

Calculate the oxygen permeability (Dk) based on the polarographic data.

Repeat for a second sample or electrode if using dual input.

Maintenance Information

(1) Clean electrodes and assembly frame after each test to prevent contamination.

(2) Periodically calibrate the instrument using standard reference lenses.

(3) Check temperature and humidity control systems regularly for accuracy.

(4) Avoid exposure of the instrument to direct sunlight or high humidity.

(5) Replace electrodes when worn or damaged to maintain measurement precision.

(6) Store the instrument in a dry and dust-free environment when not in use.

Other supplier products

	Medical Suture Line Diameter Tester	Applications Quality Control: The medical suture thread diameter tester plays a crucial role in the quality control of medical devices. By accurat...
	fabric wet adhesion performance tester	Product Overview The Fabric Wet Adhesion Performance Tester is a precision instrument designed to evaluate the adhesion behavior of clothing fab...
	KES - G5 Compression Test device	The Compression Tester analyzes hand movements-particularly, movements by finger-performed by artisans and professionals when judging a fabric's te...
	E-bike chassis dynamometer test machine	Meet the standard: EN 15194 ISO 4210 UL 2849 Product Introduction: Electric bicycles are complex systems involving mechanical, electrical, and...
	Scratch Hardness Tester	Application Primary applications: Quantitative assessment of scratch and surface hardness Evaluation of coatings, thin films, pressure-sensitive...

供应产品

Same products

	Full-Body Garment Stress Tester,FZ/T 70015	卖方: Standard International Group (HK) Limited	TheFull-Body Garment Stress Testeris a precision instrument designed to quantify the pressure exe...
	Industrial Dry Cleaning Machine,industrial garment steamer	卖方: Standard International Group (HK) Limited	TheIndustrial Dry Cleaning and Energy-Saving Dryer Machinesare designed for high-performance, rel...
	MST Medical Compression Stocking Tester,compression sock tester	卖方: Standard International Group (HK) Limited	The MST Medical Compression Stocking Tester is a professional instrument designed to evaluate the...
	MMT Liquid Water Separation Tester,MMT Liquid Water Analysis Tool	卖方: Standard International Group (HK) Limited	Applications Textile Manufacturing:Testing waterproof fabrics for outdoor gear R&D:Developi...
	Dental material color stability tester	卖方: Standard International Group (HK) Limited	Application The applications of color stability testers for dental materials are mainly reflecte...