PGX+ Contact Angle Goniometer

The PGX+ Goniometer measures contact angle (dynamic and static), surface tension, and surface energy. The PGX+ Goniometer makes a drop in µl according to the size that is set. The drop is automatically released and 80 images per second are made. The PGX+ is used for paper & board, solar cell panels, windshield, metal cylinders ad similar surfaces. For more tests deionized water is used, however using other liquids is also possible. Contact us for use on other liquids.

During testing the PGX+ Goniometer is connected to the special PC software. The software gives you an easy overview of the possible tests. During the test the data is transferred to the computer. The pictures taken and the results can be store and analyzed. Thanks to the direct feedback, adjustments to improve the results can easily be made.

• Complies with test method Tappi T458, ASTM D 724, ASTM D 5946
• Easy to handle, small sized
• Full control of the test
• No sample preparation
• Registration with 80 frames/second
• Static and Dynamic Contact Angle, Surface "free" energy, Surface Tension
• Multiple test fluids possible
• Runs on every Windows computer
• Power from USD connection

The new concept ‘Disposable Liquid System’ is an attractive alternative to tedious cleaning and replacement of expensive parts. In addition the new PG Dosing Unit will offer new opportunities not yet available with the standarrd instruments.

The PG Dosing Unit is based on a standard syringe pump for low-cost disposable syringes. The complete liquid system consists of a one mL syringe, a dispensing tip and a PTFE tubing. This standard syringe produces more than two hundred liquid droplets of four microlitres and when the syringe is emptied or not required any more, the entire liquid system is disposed of. A new syringe is then filled with the new test liquid, a new dispensing tip with tubing is attached and the syringe is put intoi the PG Dosing Unit. Disposable items like syringes, dispensing tips and PTFE tubings are offered in economical bulk packages.

The PG Dosing Unit can be operated in many modes. The most comon use is to set the pump to a preset droplet volume and pump out a new droplet for each new test position. The PG Dosing Unit can also be programmed for sophisticated analysis of the “wetting hysteresis” using the advancing/receding contact angles to characterize the surface properties.

Here the dynamic contact angle is measured as the droplet advances across the test surface (top view). The pump flow is then automatically reversed at a user-defined volume and the liquid droplet is now receding on the surface (center view). Finally the droplet will release from the dispensing tip (bottom view) and the test is aborted.