Holmarc’s Contact angle meter Model No: HO-IAD-CAM-01BC is an advanced model that features dynamic contact angle measurements with motorized precise tilting for the substrate holder, dispenser to camera positioning unit (camera can be positioned at different angle for drop imaging), automated dispenser and temperature control. Advancing and receding contact angle can be measured at different angle (Image acquisitions are also automated) and roll-off angle can also be measured.
We are using a sessile drop optical method to find out the contact angle meter but we can incorporate a pendant drop method to find out surface free energy. Additional feature from the Model: HO-IAD-CAM-01A is that this model is equipped with temperature control for the substrate holder (up to 100 degree Celsius from ambient).This proves to be ideal for the study of contact angle variations with respect to temperature. Motorized syringe pump is provided in the equipment for precise dispensing and camera interface for measuring contact angle of liquids on solid surfaces. Video capturing and video image processing features are included in Holmarc Contact angle analysis software.
The surface over which contact angle is to be measured can be rotated through 180 degree from its horizontal position for advancing and receding contact angle by tilt plate method and roll-off angle can also be measured. Three chromatographic syringes with 50 micro litre, 100 micro litre and 250 micro litre capacity are supplied along with the equipment. The wettability of a droplet is also dependent on the substrate in contact with the liquid. We provide three different substrates along with the equipment - made of aluminium, brass and stainless steel. However, the substrate according to customers’ choice can also be loaded into the equipment.
| Measuring method | Sessile drop method |
| Analysis method | Automatic curve fit analysis using drop snake method. |
| Optics | High performance aberration corrected imaging lens with precise manual focus adjustment. |
| Measurement angle range | 0 - 180 degree |
| Measurement accuracy | ≤ 1 degree |
| Camera type | CMOS Sensor |
| Image Resolution in Pixels | 2592 x 1944 (typical, max.) |
| Video system | High performance CMOS sensor and suitable shielded cable of minimum 3 m length |
| Dispenser to camera positioning unit | Designed for top view |
| Illumination mechanism | LED based diffused lighting |
| Illumination Units | Fixed backlit LED illuminator and angled illuminator for top view imaging |
| Liquid dispenser | Through motorized syringe pump; suitable for both motorized and mechanical type |
| Three syringes with 50, 100 and 250 micro litre capacity will be included | |
| Temperature of test base | Adjustable from ambient to 100°C |
| Substrate / sample holder | It will be rotatable in the range 180° from its horizontal position; Height adjustable |
| Substrates | Aluminum, brass and stainless steel (1 each) |
| Focusing | ≥ 75 mm travel of CMOS / Optics assembly to fine focus the image |
| Other accessories | For live image / video capturing and contact angle measurements, windows operating system (OS) compatible processing software is included. The system has provision for : |
| i. Static and dynamic contact angle measurement | |
| ii. Contact angle hysteresis, iii. Roll-of Angle | |
| Input power | 230+10 VAC, 50Hz |
| Warranty | The complete unit will have minimum one year warranty from the date of installation |
| The system has rigid & vibration resistant construction suitable to operate on a table top | |
| # Laptop is not in scope of supply | |
1. White light LED with variable intensity control ensures extreme low heat radiation.
2. Precise travel adjustment provided for CMOS with Optics assembly to fine focus the image.
3. Motorized syringe pump for precise micro liter dispensing.
4. 50, 100 & 250 micro liter sample syringes provided with the system.
5. Precision height adjustment and angular displacement provided at the test base.
6. Vibration inhibiting solid construction for sharp drop images.
7. Powerful and user friendly windows software provided for image analysis.
8. Live images can be viewed on the PC monitor showing the droplet on the solid surface reassures the operator - regarding validity of the contact angle measurement.
9. Substrate can be rotated 180 degree from horizontal position.
10. Captured image and its Angle measurement table can be saved for future reference.
Contact angle is the angle formed by a liquid at the phase boundary where a liquid, gas and solid intersect. The shape of the drop is controlled by the three forces of interfacial tension. Static Angle and Advancing Angle are quantitative measures of the wetting of a solid by the liquid, but they can also be used as a quality control measure in surface treatments and surface cleanliness. Receding Angle is a quantitative measure of the adhesion of a solid to a liquid.
State-of-the-art optics, precise opto-mechanics, high-resolution CMOS detector and associated electronics used in our instrument guarantee error free measurements. Manual and automatic dosing of liquids can be done using our system.
Standard off the shelf syringes can be integrated from 0.4 to 20 ml, from any manufacturer.
Compatible with glass, plastic and SS syringes.
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