The contact angle is the angle formed where gas, liquid and solid meet, and it is used to judge the wettability of a material surface. The JHPBT-A1 water contact angle tester uses optical profile projection to analyse the outline of a liquid droplet on a solid sample: it captures the droplet’s shape on the sample surface and reads the contact angle from the image.
It has a 5-megapixel camera running at 300 fps (higher frame rates optional) and a custom telecentric zoom lens that tilts ±10°. Droplets are dispensed by a software-controlled automatic dispensing pump with a 500 μl syringe, and both the sample stage and the dispensing position can be fine-tuned by hand.
| Key figure | Value |
|---|---|
| Camera resolution | 5 MP |
| Camera frame rate | 300 fps (higher optional) |
| Syringe capacity | 500 μl |
| Machine weight | approx. 25 kg |
Applications
- Surface profile analysis of liquid and solid samples (optical profile projection)
- Wettability of material surfaces: judging how hydrophilic or hydrophobic a surface is from the droplet contact angle
Specifications
| Item | Specification |
|---|---|
| Model | JHPBT-A1 |
| Machine dimensions | 630 × 180 × 680 mm |
| Weight | approx. 25 kg |
| Power | 220 V, 60 W, 60 Hz |
| Stage size | 180 × 200 × 80 mm |
| Sample size | 300 × 200 × 70 mm |
| Adjustment range | X axis manual travel 80 mm, accuracy 0.1 mm; Y axis manual travel 50 mm, accuracy 0.1 mm; Z axis manual travel 80 mm, accuracy 0.1 mm |
| Camera frame rate | 300 fps (higher optional) |
| Camera resolution | 5 MP |
| Lens | Custom telecentric zoom lens |
| Lens tilt | ±10°, accuracy 0.5° |
| Light source adjustment | Software and hardware control |
| Dispensing system | Software-controlled automatic dispensing pump |
| Dispensing travel | X axis manual 80 mm, accuracy 0.01 mm; Z axis manual 80 mm, accuracy 0.01 mm |
| Syringe | High-seal syringe, 500 μl |
Terms used in measurement
- Contact angle: the angle θ formed where gas, liquid and solid meet; used to judge the wettability of a material surface.
- Surface tension: the pulling force, per unit length of boundary, acting perpendicular to that boundary between any two adjacent parts of a surface.
- Interfacial tension: the force acting between a liquid and another liquid it does not mix with.
How to choose
- To measure the contact angle of a droplet on a sample and compare surface wettability: choose the JHPBT-A1.
- If your process includes plasma surface treatment, see the JHPBT-290 vacuum plasma cleaner (batch type), the JHPBT-390 inline plasma cleaner or the JHPBT-590 inline vacuum plasma cleaner; contact angle can be used to compare wettability before and after treatment.
- To check for ionic residue on boards after cleaning, see the JHPB-TLZ20 ionic contamination tester; for a larger model, see the JHPBT-LZ22.
Request a quote
Tell us the liquids and sample types you need to measure, the sample size, and whether you need a higher-frame-rate camera; we will first confirm whether this tester suits your measurement. Request a quote →