Introduction to Automatic Liquid Density Meter SDW-009

The automatic liquid density meter SDW-009 uses the principle of a vibrating cylinder density sensor for liquid density testing. After pumping the liquid to be tested into the resonant cylinder sensor, it is measured and processed by a microcontroller, which is fast, direct, and highly sensitive. It can be widely used for measuring the density of various liquids, and has been widely applied in various fields such as chemical, pharmaceutical, petroleum, and food and beverage processing. It can also be used for quantitative packaging testing in quality and technical supervision systems, as well as in laboratories of various colleges and universities(Excluding Qin fluoride acid)Like alcohol, the volume concentration data can be directly read out through the processing of microcontroller software, making testing more convenient.

Features:

1. Constant temperature control: As the liquid density is greatly affected by temperature, it is necessary to convert the liquid density detected at real-time temperature into the liquid density at 20 ℃. This instrument is controlled by a constant temperature bath, where the sensor, its components, and the sample solution are sealed inside the bath. The temperature of the oscillation tube (sample solution) is detected by a temperature sensor, and the electronic components are controlled by a microcontroller to cool or heat it, ensuring that the temperature inside the bath remains stable within the range of 20 ℃± 0.1 ℃.

2. Directly display the alcohol content value of the liquid at 20 ℃, and display it based on temperature: detect the oscillation frequency of the sensor through a microcontroller, use the mathematical model of the relationship between the sensor frequency and liquid density to calculate the density value of the liquid, and then perform floating-point operations to ensure the accuracy of the measurement results without additional errors caused by insufficient calculation bits. Convert the density value of alcohol solution into alcohol content value through dedicated software. The density value calculated by the microcontroller is displayed digitally and has a temperature display window. You can also use the conversion key to view the density value of the corresponding alcohol solution.

3. Automatic sampling: The use of a microcontroller to control a stepper motor to drive a peristaltic pump for sample suction improves the automation level of the product

4. Non hanging wall treatment: During the flow of liquid, residual liquid will be left on the inner wall of the oscillating tube, which will affect the measurement accuracy. Therefore, by performing non hanging wall treatment on the inner wall of the oscillating tube, residual liquid on the inner wall of the oscillating tube can be avoided, ensuring the accuracy of the instrument.

5. Data storage: Built in storage chip, capable of storing 80 sets of detection data, and can be recalled and deleted.

6. Calibration function: When the instrument is not used for a long time, drift will occur. This instrument can be calibrated using 20 ℃ pure water as a standard.

Technical Specifications

Measurement range: 0.000~1.999g/cm³

Accuracy: ± 0 001g/cm³

Resolution: ± 0 001g/cm³

Alcohol content measurement range: q: 0~100%

Alcohol content indication error: ± 0.5%

Constant temperature control: 20 ℃± 0.1 ℃ (customizable constant temperature of 25 ℃)

Sampling volume: 2ml/time (automatic injection and manual injection)

Data storage: 80 sets

Environmental temperature requirement: 5 ℃~35 ℃

Power supply: 220V ± 22V, 50Hz ± 1 Hz, 50VA

Dimensions: 206mm × 205mm × 200mm

Instrument weight: 3.2Kg

Precautions

1. During calibration, the water should ensure its purity, rinse it several times, and confirm that there are no bubbles in the vibrating cylinder in order to make the calibration data accurate.

If the liquid used for measurement is an acid-base solution, it is necessary to replace it with a specialized acid-base resistant pipeline.

3. After the experiment, the instrument pipeline should be cleaned for the next test.