
Automatic Surface Tensiometer
An automatic surface tensiometer for surface and interfacial tension measurement across a wide range of liquid samples.

Louise Corscadden, PhD
Director of Science · ConductScience
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Key Specifications
Full details →- Model fit
- Configured during quote
- SKU family
- BIO-0841
- Sizing
- Model-specific dimensions confirmed from the selected configuration
- Ordering
- Online checkout and quote request available
- Category
- Benchtop Instruments
- Build notes
- Confirm accessories, station layout, and support needs before purchase
Overview
This instrument performs accurate surface and interfacial tension measurements across a wide range of liquids. It features an LCD for instant result display and automatic averaging of multiple tests. With a unique dual-calibration system--using standard weights for certification compliance and reference liquids for precision and repeatability--it ensures reliable results through a simple and efficient calibration process.
Key Features
- Features a unibody casing and precision direct-drive mechanism, significantly enhancing instrument reliability and durability. The vibration-free transmission ensures physical stability for improved testing accuracy.
- Utilizes a micro stepper motor for the lifting platform, enabling high-speed adjustment to enhance efficiency and reduce testing time. Automatically switches to standard speed during measurement to guarantee precision.
- Equipped with a 32-bit ARM microcontroller for high-speed operation and computational accuracy. A proprietary filtering algorithm ensures stable and accurate readings.
- Incorporates a 24-bit AD converter for rapid signal conversion and highly accurate force value acquisition.
- An improved torsion wire lever mechanism guides the sensor core in a near-linear path, ensuring excellent test linearity.
- Employs a high-end domestic LVDT displacement sensor with superior linearity, sensitive signal output, and precise impedance matching, guaranteeing repeatable test accuracy.
Specifications
| Model | BKST-200A |
|---|---|
| Measuring Range | 0~200.0mN/m |
| Resolution | 0.01mN/m |
| Accuracy | ≤±1%FS |
| Repeatability Error | ≤±1%FS |
| Platinum Ring Specification | Ring radius(R) 9.55mm, wire radius(r) 0.3mm |
| Standard Accessory | Platinum ring, hook, glass vessel, 1000-milligram weight*2, 500-milligram weight*1 |
| Power Supply | AC110/220V, 50/60Hz |
| External Size(W*D*H) | 260*200*310mm |
| Package Size(W*D*H) | 300*300*400mm |
| Net Weight | 10kg |
| Gross Weight | 12kg |
Model
- BKST-200A
Measuring Range
- 0~200.0mN/m
Resolution
- 0.01mN/m
Accuracy
- ≤±1%FS
Repeatability Error
- ≤±1%FS
Platinum Ring Specification
- Ring radius(R) 9.55mm, wire radius(r) 0.3mm
Standard Accessory
- Platinum ring, hook, glass vessel, 1000-milligram weight*2, 500-milligram weight*1
Power Supply
- AC110/220V, 50/60Hz
External Size(W*D*H)
- 260*200*310mm
Package Size(W*D*H)
- 300*300*400mm
Net Weight
- 10kg
Gross Weight
- 12kg
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