Video Optical Contact Angle TesterTesting method:

There are usually two existing testing methods for contact angle: one is the shape image analysis method; The second method is the weighing method The latter is commonly referred to as a wetting balance or a permeation contact angle meter However, currently widely used, the direct and accurate measurement method is still the shape image analysis method The principle of the shape image analysis method is to drop liquid droplets onto the surface of a solid sample, obtain the shape image of the droplets through a microscope lens and camera, and then use digital image processing and some algorithms to calculate the contact angle of the droplets in the image The method of calculating contact angle is usually based on a specific mathematical model, such as a droplet being considered as a part of a sphere or cone, and then the contact angle value is calculated by measuring specific parameters such as width/height or by direct fitting. The Young Laplace equation describes the relationship between the internal and external pressure difference of a closed interface and the curvature and tension of the interface, which can be used to accurately describe the contour of an axisymmetric droplet and calculate its contact angle.

HARKE-SPCA-X3Product parameters of contact angle measuring instrument

lSample table size: 100mm * 120mm

lContact angle measurement range: 0-180 °

lContact angle display accuracy: ± 0.01 °

lContact angle measurement accuracy: ±. 1 °

lSurface/interface tension measurement range: 0-1000mN/m

lOptical system: 0.7X-5X high-definition card zoom lens

lVideo system: USB 3.0 camera+PC soft control 40 frames per second (optional 100 frames per second, 300 frames per second, 1000 frames per second or higher)

lInstrument dimensions: 300mm * 760mm

lCamera movement stroke: 30mm

lInstrument weight: 30kg

lMeasurement software: SPCA1.0

lPower supply: 220V 3A50Hz

lMeasurement temperature: room temperature

lMeasurement methods: 8 methods including circular ring method, ellipse method, height width method, etc. are provided

lElectric positioning accuracy: ± 0.1mm

lInjection system movement stroke: 30mm

HARKE-SPCA-X3Basic functions of contact angle measuring instrument

lAutomatic droplet recognition+delay

lAutomatic droplet formation

lcurve generation

lAutomatic drip control

lAutomatic X-axis moving single column measurement

lDynamic contact angle (turning method) forward angle, backward angle, sliding angle