**Product Description of Density Meter and ZhaoHui Industrial Control by Hebei ZhaoHui Industrial Control Technology Co., Ltd.**
### 1. Overview
With the rapid development of industrial automation, traditional sampling methods for liquid density measurement can no longer meet production needs. In online density measurement, the static pressure method is the most feasible approach. It wasn't until recent years that a large number of advanced pressure sensors entered China, such as the Rosemount 3051 pressure sensor, which has an accuracy of 0.075%. This provided a reliable guarantee for the research and development of our company's online density meter. The DT-1 type online liquid density testing transmitter summarizes various online density measurement methods and conducts extensive field investigations in industrial environments. Based on the principles of simplicity and practicality, it has been successfully designed and developed.
This device includes a capacitive differential pressure sensor and a pair of pressure relays connected to it, which are inserted into the production process. Between the two pressure relays, there is an integrated precision temperature sensor to display changes in liquid temperature, and a dedicated software program calculates the density. Therefore, this instrument can simultaneously read two parameters: medium temperature and density, facilitating standard density conversion across various industries. This device can perform online density measurements for various liquids or liquid mixtures. As such, it is widely used in the petrochemical industry for applications such as oil refining, oil blending, and oil-water interface monitoring; in the food industry for production sites like grape juice, tomato juice, fructose syrup, vegetable oil, and soft drink processing; in the dairy industry; in the papermaking industry for testing black liquor, green liquor, white liquor, and alkali solutions; in alcohol content measurement in brewing; and in the chemical industry for organic solvents, urea, detergents, ethylene glycol, acids, bases, and polymer density testing. It can also be applied in mining for saltwater, potassium hydroxide, sulfur dioxide water solutions, lubricants, and biopharmaceuticals.
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### 2. Technical Specifications
1. **4～20mA current output**: With superimposed digital signals (HART protocol).
2. **Power supply**: 16～30VDC, recommended use of 24VDC.
3. **Density range**: 0～2 g/cm³ or 0～3 g/cm³ (selected when purchasing).
4. **Accuracy**: ±0.001 g/cm³.
5. **Resolution**: 0.001 g/cm³.
6. **Temperature range**: 0～100°C.
7. **Temperature accuracy**: ±0.5°C.
8. **Environmental temperature**: -10～60°C.
9. **Humidity range**: 0～90% RH.
10. **Damping adjustment**: 0～16 seconds; 0～32 seconds.
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### 3. Features
1. **Integrated two-wire transmitter structure**: No moving parts, simple maintenance.
2. **Dual four-digit LCD display**: Simultaneously displays temperature and density parameters, convenient for industry-standard density and concentration conversion.
3. **Simple installation and connection**: Insert into liquid for immediate reading.
4. **Suitable for both flowing and stationary liquids**: Ideal for pipeline and tank installations.
5. **Continuous online measurement of liquid density and temperature**: Can be directly used for production process control.
6. **Liquid-contact components made of several types of stainless steel**: Safe and hygienic.
7. **Intrinsically safe design**: Suitable for hazardous areas; sanitary models can be installed in food production environments.
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This product offers a comprehensive solution for online density measurement, providing high accuracy and reliability while being adaptable to a wide range of industries and applications.