The SITA SurfaSpector is used for quick and easy testing of the Wettability of metal, glass and plastic surfaces, e.g. after surface pre-treatment or cleaning.
The device combines an objective Contact angle measurement with simple handling and allows a reliable assessment of the surface.
Features
- Automated measuring sequence with drop placement, drop detection and contact angle determination
- Mobile and flexible use without PC directly at the plant or in the process
- Easy and intuitive operation via touchscreen
- Handy sensor head for measuring on various surface geometries
| Quantity | Contact angle in mN/m |
| Fields of application |
Control of the surface activation, e.g. after a plasma treatment Testing wettability Quality assurance after part cleaning |
| Use | Control of the water contact angle on surfaces, e.g. plastics, metals, ceramics, glass, etc. |
| Measurement | non-contact, non-destructive, non-toxic |
| Measurement monitoring | SITA bead standards (standard delivery) |
| Industry | Surface technology, automotive, mechanical engineering, medical technology, electrical engineering, aerospace and many more |
The Contact angle θ (also called edge or Wetting angle) is the angle that a drop of liquid forms when spreading on a solid surface. The size of the contact angle depends on the interactions between liquid and solid.
θ = 0° complete wetting
0° < θ < 90° hydrophilic surface, wettable
θ > 90° hydrophobic to super-hydrophobic surface, barely wettable
θ > 160° super-hydrophobic surface ("lotus effect" when using water as test liquid)
Contact angle measurement with the SITA SurfaSpector
A drop of water is precisely placed on the surface by an automatic dosing unit. The drop is illuminated from the side, causing a drop shadow to fall onto an inclined measuring surface. The projection is recorded from above by a high-resolution camera and the picture is corrected for perspective. The drop shape is determined and the contact angle calculated. The lower the contact angle, the higher the wettability.
| Contact angle | ||
|---|---|---|
| Range | 5°…175° | |
| Resolution | 0.1° | |
| Test liquid | pure water, refillable, 5 ml for 5,000 measurements | |
| Measuring method | ||
|---|---|---|
| Optical determination of the contact angle of a lying drop | ||
| Drop volume | 1 μl | |
| Min. sample surface | 5 x 5 mm | |
| Power supply | ||
|---|---|---|
| Li-Ion battery | 2x 6,400 mAh, min. measurement time 6 hours | |
| Power plug | 12 V, 2,5 A (max. 17 V, 3 A) | |
| General data | ||
|---|---|---|
| USB | USB-C (data transfer, USB-C power delivery) | |
| Display | 5“ TFT-display 800 x 480 Pixel, capacitive touch, intuitive grafical user interface | |
| Sensor | Measurement start button, LED for optical feedback | |
| Storage | 10 GByte | |
| Dimensions (HxWxD) | Base unit: 80 x 210 x 130 mm; Sensor: 117 x 50 x 82 mm | |
| Weight | Base unit: 1.100 g; Sensor: 330 g | |
- Measuring device
- Sensor head
- Robust device case
- Power supply and USB-cable
- Stand holder for sensor head (optional)
- Ultrapure water
- Operating instructions
- Quick start guide
- Calibration certificate
- Accessories (additional projection surface, tool for replacing the projection surface, refill syringe, working standard)
 | Brochure SITA SurfaSpector(552 KB) |
References
SITA measuring devices have been successfully used in a variety of applications worldwide for over 25 years. The companies listed here represent just a small
selection of our extensive customer base.
Simply get in touch with us. You can find the contact details of our sales and application department under contact persons.
For support in your country, please see our international sales partners.
Alternatively, send an e-mail to info@sita-messtechnik.de, call us at +49 351 288 53-0 or send us a message using the contact form.