Du Nouy Ring Digital Surface Tensiometer - ASTM D971 Compliant

Product Description

Du Nouy Ring Digital Surface Tensiometer - ASTM D971 Compliant

The working principle of this instrument is to apply the high-frequency induction micro-displacement automatic balance measurement system to the torque balance, when the force acting on the platinum ring changes, the balance rod connected to the platinum ring is in the two eddy current probes. Displacement is generated, so that the inductance generated in the two eddy current probes changes: this causes the differential transformer to lose balance, and the input signal of the differential amplifier in the circuit also loses balance. The electrical signal changes and changes, and the signal is sent to the microprocessor for processing and automatically calculates the actual tension of the tested ocean according to ASTM D971

Product Description

 

Application Field of Automatic Surface Tension Meter:

1.  Oil aging test, especially transformer oil (ASTM D-971)

2. Determination of Surfactant Effectiveness in Wetting Agents and Cleaners Test Surfactant Solution Concentration.

3. Canning approval and cleaning validation in the food industry.

4. surface tension measurements for quality control and optimization of emulsifiers.

5. Cooling lubricant surface tension test.

Structure of Automatic Surface Tension Meter:

1. Large-screen LCD display

2. Sample cup: used to hold the foreign matter to be tested

3. Zero fine-tuning

4. Ring frame rod

5. Platinum ring: for measuring samples

6. Sample tray

7. Button without logo

9. Machine foot: adjust the instrument level

10. Printer, computer interface

11. Power switch

12. Power socket

13. Fuse box

IFT measurement:
1. Use tweezers to pick up the clean platinum plate. Use a sprinkler to burn the platinum plate until it turns red, hang the plate and cover the bulb. Hang the charred platinum plate on the hook
2. Put the measuring liquid into the sample pan, and then place the sample to be tested on the sample stage. Always visually check the height of the platinum plate before placing it. if it may be submerged in the sample
3. After placing the sample: start counting for five minutes to read a value, after taking the value, press the "down" key, the sample stage will gradually descend, separate the platinum plate from the sample to be tested, and then press "up" , and repeat the operation twice. Take this value for 5 minutes each time, and then add the three read values to get the average value, which is the evaluation value of the sample.
4. Carefully remove the container containing the sample into the sample to be inspected, then gently place the completed container in the wash basin and rinse with running water.
5. Pick up the platinum plate with tweezers and rinse with tap water. When washing, pay attention to keep a certain angle with the water flow.

Cleaning of Automatic Surface Tension Meter:
Clean the sample cup with petroleum ether, followed by acetone and water respectively, and then soak it in hot chromic acid wash to remove oil, and then rinse it with water and distilled water, if the sample is not to be used immediately, it should be inverted on a piece of clean cloth, and the platinum ring should be cleaned with petroleum ether, and then rinsed with ketone, and then heated in the oxidizing flame of an alcohol lamp. Note: The platinum ring should be cleaned by removing it from the ring holder rod, and the power supply of the instrument must be switched off when the platinum ring is removed and installed, and after installing the platinum ring, the platinum ring should be made to be on the same plane in each part.

Image Display of Automatic Surface Tension Meter:

Workshop:
1. Over 10 years trading experience of Lab instruments
2. 50 years experience in R&D and manufacturing Cast GOLD Brand
3. Passed ISO9001 international quality system certification
4. Mainly develop and produces analyzing instruments for petroleum Products and Asphalt analyzing equipments for Highway Engineering.
5. our companys productions have become highly intelligentized and widely cover.With strong technical force and strong development, new products have been launched continuously.

Gold Equipment Service:

Service
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