HOME > PRODUCT > Lab Equipment > Material Research > Contact Angle

Contact Angle

Tags: matterial research, contact angle

CONTACT ANGLE GONIOMETER AND TENSIOMETER PRODUCTS

 RAMÉ-HART PRECISION CONTACT ANGLE GONIOMETERS AND TENSIOMETERS ARE BACKED BY NEARLY 50 YEARS OF EXPERIENCE AND REPUTATION. RAMÉ-HART WAS THE FIRST COMANY IN THE WORLD TO MANUFACTURE A CONTACT ANGLE GONIOMETER BASED ON THE NRL DESIGN OF DR. WILLIAM ZISMAN. TODAY NEARLY FIVE OF DECADES OF EXPERIENCE ARE BUNDLED IN EACH CONTACT ANGLE GONIOMETER AND TENSIOMETER. RAMÉ-HART ONLY MAKES SURFACE SCIENCE TOOLS FOR MEASURING CONTACT ANGLE AND SURFACE TENSION. THAT IS OUR SOLE FOCUS. OUR MACHINISTS AND INSTRUMENT TECHNICIANS HAND BUILD AND ASSEMBLE EACH UNIT TO RIGID SPECIFICATIONS. NO GONIOMETER SYSTEM WILL SHIP FROM OUR FACILITY UNTIL IT HAS BEEN THOROUGHLY TESTED AND CALIBRATED AND EVERY COMPONENT IS IN PROPER WORKING ORDER. RAMÉ-HART IS THE WORLD-WIDE LEADER IN SURFACE SCIENCE INSTRUMENTS AND CONTACT ANGLE GONIOMETERS.
 PLEASE REFER TO THE MATRIX BELOW TO BETTER UNDERSTAND THE DIFFERENCES BETWEEN THE VARIOUS GONIOMETER AND GONIOMETER / TENSIOMETER (G/T) PRODUCTS.




Ϯ – requires software upgrade♦ – Model 400 includes an 8″ Wafer Support but supports up to 12″.

Note that all current goniometer models ship with a microsyringe fixture (p/n 100-10) and microsyringe assembly (p/n 100-10-20) 

for manual dispensing. The optional software-driven Automated Dispensing System is supported on Models 200 and up.

In surface science, an instrument called a contact angle goniometer is used to measure static contact angle, 

advancing and receding contact angle, and in some cases, surface energy. The root  goni refers to “angle” 

while meter  refers to measuring device. Thus a goniometer is a measuring device for angles. 

While the term has been used to describe a tool used by physical therapists and also for measuring other types of angles, 

the traditional and more prominent use of the word “goniometer” has been to describe a contact angle meter.

A goniometer / tensiometer is an instrument that can measure both contact angle as well as surface tension and interfacial tension. 

Models 250, 260, 500, and 590 are all goniometer / tensiometer instruments. All (5) of these models ship with DROPimage Advanced software. 

This powerful program calculates surface and interfacial tension using a standard PC. The method used is based 

on the Young-Laplace equation and the program has been designed to handle pendant, inverted pendant, sessile, and captive bubble drops. 

DROPimage Advanced is methods-based allowing full control over every aspect of the experiment allowing for sophisticated dynamic 

and time-dependant studies. Results include surface tension, interfacial tension, contact angle, surface energies of solids, drop dimensions, 

volume and surface area, as well as surface dilatational elasticity and viscosity. Full control over the Automated Dispensing System and 

the Automated Tilting Base accessories is integrated into the software allowing them to be controlled via discrete controls or via 

a methods-based experiment. The Automated Dispensing System and the Automated Tilting Base are included with Model 290 and 590 

but are sold separately with all other models including Model 250, 260 and 500. DROPimage Advanced has all of the surface energy tools 

included with DROPimage Standard.



DROPimage Software

The ramé-hart DROPimage series software was written and developed by Dr. Finn Knut Hansen, a Scientist and Professor of Chemistry 
at the University of Oslo, and is available exclusively from ramé-hart instrument co. 
Our lineup currently includes three editions as detailed below.
 
 



          DROPimage and Legacy Software

          In 2002 ramé-hart retired the RHI imaging software and in 2004 support for that product was phased out. We strongly recommend that 

          RHI users upgrade to DROPimage. Please contact us for upgrade pricing. Here are some advantages to DROPimage over RHI:

          Real Live Display

          More Accurate Contact Angle Measurements from Circular Curve Fit Option

          Improved optimization routines

          Better Results Output and Presentation

          Spreadsheet-style Output and Log Files

          Calculation of Standard Deviations of Surface Energy using the Monte Carlo Simulation

          Additional Solid/Liquid/Liquid Tool and Single Liquid SE Tool

          Easy to understand Graphical User Interface

          Supports Automated Dispensing System (Standard and Advanced)

          Supports Automated Tilting Base (Advanced only)

          Supports Oscillator (Advanced only)

          Frequent updates and patch fixes are available

          DROPimage is constantly being improved with new features and support for new options


Visitors: 5,964