Ring/Plate Tensiometer STA

Quick surface tensions with an easy available tensiometer Ring and plate tensiometry belong to the classical methods for measuring the surface tension of liquids. The principle is to measure the weight of a meniscus hanging on a ring or plate. Our solution does not an extra force transducer as any accurate laboratory balance (better than 0.1 µg) is suitable to complete this instrument. Easy handling and operation with a modern Windows software. Both manual and automatic versions are available. The density of a liquid can be measured as well by the immersion of a body of known volume. • laboratory balance (better 0.1 mg) • automatically motor driven movement of the ring or plate or manual movement by a linear stage • holder for a ring, plate or immersion body The instrument allows the following measurements: • surface tension of liquids • ring and plate method • determination of density with an immersion body • corrections factors after Harkins and Jordan • contact angle measurements with the immersing plate technique • easy to handle instrument and software • also available as manual instrument • use with any PC or laptop Extra accessories: • Wilhelmy plate • immersion body for density measurements • temperature controlled cell Range of surface and interfacial tension: 1 to 1000 mN/m Reproducibility of measured values: resolution: ± 0.1 mN/m(with balance ± 0.1 mg) Time range: 01 s to 10 h Range of contact angle measurement: 10° to 170°, accuracy ±0.3° Software: Windows software (free update over 1 year after purchase) Temperature operating range: 10 – 50°C Measurement temperature range: room temperature, (optionally 0 – 80°C) Connection to PC: RS-232 Power supply, external: 100 … 240 AC; to 12 VDC Power consumption: max. 55 W Size of device (LxWxH) - manual version (without balance): 100 x 100 x 300 mm Size of device (LxWxH) - automatic version (without ballance): 200 x 50 x 250 mm Weight Measurement unit - manual version (without a balance): 1 kg Weight Measurement unit - automatic version (without balance): 2 kg DMeasuring options - Du Nouy ring method: standard routine DMeasuring options - Wilhelmy plate method: standard (optional contact andge) DMeasuring options - Density determination: for liquid density < 2 g/cm³