Kinematic viscosity is a measure of the internal friction of a liquid flowing under gravity, defined as the ratio of dynamic viscosity to density at the same temperature. It is an important physicochemical property indicator for identifying oil grades and quality. In practical applications, selecting lubricating oils with appropriate viscosity ensures the normal and reliable operation of mechanical equipment. It is suitable for measuring the kinematic viscosity of transparent and opaque liquids, including crude oil, light and heavy fuel oils, lubricating oils, additives, and waste oils. It is also applicable for measuring the kinematic viscosity of samples with high wax content or components that do not melt at room temperature. It can be widely used in power, petroleum, chemical, commercial inspection, and scientific research sectors. The product complies with the standards: GB/T265-88 "Determination of Kinematic Viscosity and Calculation of Dynamic Viscosity of Petroleum Products," SY/T5651 "Technical Conditions for Kinematic Viscosity Testers of Petroleum Products," and GB/T1841 "Test Method for Viscosity of Dilute Solutions of Polyolefin Resins."

I. Main Features of the Low-Temperature Kinematic Viscosity Tester (-40°C)

1. Uses a Dewar flask cold bath, which offers a simple structure, excellent insulation, transparency, and good sealing.

2. Cascade compressor refrigeration ensures fast cooling speed and high cooling depth.

3. Touch-controlled LCD screen with Chinese character display for clear and intuitive operation, making it user-friendly.

4. Capable of setting viscometer constants, temperature control values, fine-tuning temperature values, test repetitions, etc. The instrument has a memory function.

5. High-precision sensors and temperature control technology provide high accuracy and a wide temperature control range, ensuring more accurate experimental results.

6. Equipped with two viscometer clamps, allowing simultaneous testing of two experimental samples.

II. Main Parameters of the Low-Temperature Kinematic Viscosity Tester (-40°C)

1. Installation method: Desktop

2. Display method: LCD data display

3. Interaction method: Touch control via LCD screen

4. Temperature control range: Room temperature to -40°C, adjustable

5. Temperature control accuracy: ±0.1°C

6. Number of test holes: Dual holes

7. Heating method: Heating rod

8. Temperature control method: Microcomputer-controlled

9. Refrigeration method: Compressor refrigeration

10. Printing method: Thermal printer

11. Temperature detection: Industrial-grade platinum resistance

12. Experimental bath: Double-layer Dewar flask

13. Ambient temperature: 5°C to 45°C

14. Relative humidity: 0% to 80%

15. Environment: Free from vibration, corrosive gases, flammable gases, oil mist, water vapor, dripping water, salt, etc.

16. Power supply: AC220V±10%, 50Hz

17. System power consumption: Not exceeding 2000W