Automatic Surface Tension Measurement Tensiometer by Du Nouy Ring Method
Introduction:
The Du nouy ring method is a traditional test method, which takes about 70 years. Using a platinum wire with a diameter of 0.37 mm made into a ring with a circumference of 60 mm. During the test, the platinum ring is immersed in the liquid surface (or two non-mixed interfaces) for 2-3 mm, and then the platinum ring is slowly lifted upward, and a film is formed between the ring and the liquid surface. The membrane has a pull-down force on the platinum ring, measuring the maximum force applied to the ring during the entire platinum ring lift process, and then converting it to a true surface (interface) tension value.
The Du nouy ring Tensiometer is based on Platinum Ring Method Principle to achieve accurate measurement of liquid surface tension value. The instrument integrates a number of advanced technologies, widely used in chemical, petroleum, electric power, scientific research, railways and other industries.
Main Features:
1. Full-automatic measuring the sample tension value using a powerful new generation of microprocessor.
2 . 10-inch 65K (resolution 800*600) color touch LCD display, Chinese and English prompt menu operation.
3 . The surface of the appearance is treated by electrostatic spray, which is corrosion-resistant and easy to clean.
4 . With 25ºC automatic temperature compensation function, the effect of temperature on the measured tension value is solved.
5 . The instrument automatically zeros, automatically measures, calculates, displays experimental results, and has a power-down storage function.
6 . The lifting platform of the instrument is automatically raised and lowered, stable, low noise and accurate.
7. The use of a magnetic tank closed sensor with equal-interval multi-point calibration improves the repeatability and reproducibility of measurement results.
Reference Standards:
1. GB/T6541-1986 Petroleum products -- Mineral oils-Determination of interfacial tension of oil against Water by Ring Method.
2. ISO 6295-1983 Petroleum products -- Mineral oils-Determination of interfacial tension of oil against water-Ring method.
3. JB/T 9388-2015 Interface tensiometers -- Technical specification.
4. ISO1409-1995 Plastics/rubber -- Polymer dispersions and rubber latices (natural and synthesis)-Determination of surface tension by the ring method.
5. SH/T1156-2014 Determination of synthetic latex surface tension.
6. GB/T5549-1990 Surface active agents -- Determination of surface tension by drawing up liquid films.
7. ISO 304-1985 Surface active agents -- Determination of surface tension by drawing up liquid films.
8. ISO 4311-1979 Anionic and non-ionic surface active agents -- Determination of the critical micellization concentration -- Method by measuring surface tension with a plate, stirrup or ring.
9. GB/T 22237-2008 Surface active agents--Determination of surface tension.
10. GB/T 18396-2001 Natural latex--Ring method for measuring surface tension.
11. ISO14090-82, ASTM D1417, EN14370, ZB2025-93, GB2960-82, etc.
Main Specifications:
| Display method |
10 inch 65K (resolution 800*600) color touch LCD display |
| Measurement method |
Principle of platinum ring method |
| Platinum ring radius |
R9.55 platinum wire r0.3 |
| Measuring range |
0-400mN/m |
| Sensitivity |
0.01mN/m |
| Accuracy |
±0.01mN/m |
| Self-checking function |
failure automatic diagnosis |
| Temperature compensation |
auto temperature compensation |
| Power consumption |
<40W |
| Dimensions |
440mm*190mm*350mm |
| Service environment |
Temperature 10ºC-40ºC, humidity<80% |
| Power supply |
AC220V±10% 50HZ±2.5HZ |
| Weight |
About 7.5kg |
Du nouy ring Tensiometer in our laboratory!
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