Bubble Level Meter Air-Blowing Liquid Level Gauge for Precise Measurement of Liquid Level Height

The air-blowing level gauge is an instrument used to measure the liquid level. Its working principle is based on the relationship between the static pressure of the liquid and the liquid level height. The following are its main working principles and processes:

1. Working principle
The air-blowing level gauge calculates the liquid level height by passing a certain pressure of gas (usually compressed air) into the measuring tube and measuring the pressure change when the gas flows through the pipe.

- **Liquid static pressure formula**:
[
P = rho g h
]
Where:
- (P) is the static pressure of the liquid;
- (rho) is the density of the liquid;
- (g) is the acceleration of gravity;
- (h) is the liquid level height.

- **Core process**:
- Gas enters the tank or container through the air-blowing pipe.
- When the pressure of the gas reaches equilibrium and just offsets the static pressure of the liquid, the gas pressure at the pipe mouth is equal to the liquid pressure.
- Use a pressure sensor to measure the pressure value of the gas in the pipe, and combine the known liquid density and gravity acceleration to calculate the liquid level height.

---

2. Equipment composition
The air-blowing liquid level gauge is mainly composed of the following parts:
- **Air blowing device**: used to generate and adjust the pressure of the air flow;
- **Air blowing tube**: inserted into the liquid, and its lower end opening position corresponds to the liquid level reference point;
- **Pressure sensor**: measures the gas pressure in the air blowing tube;
- **Display or transmitter**: converts the measured pressure into liquid level height and displays or outputs it.

3. Features and advantages

- **Advantages**:
- Suitable for measuring viscous or corrosive liquids because there is no direct contact between the air blowing tube and the sensor.
- Simple structure and easy maintenance.
- Can work in high temperature, high pressure and highly corrosive environments.

- **Disadvantages**:
- There are requirements for the quality of the gas source, and the gas must be free of impurities or moisture.
- The measurement accuracy is affected by the change in liquid density.
- The air blowing process may introduce slight disturbances, which may not be applicable to some sensitive liquids.

---

4. Application scenarios
Air-blowing level gauges are widely used in industrial process control, such as:
- Corrosive liquid storage tanks in the chemical industry;
- Crude oil or sewage treatment in the petroleum industry;
- Tank level monitoring in the water treatment industry.

Air-blowing level gauges can achieve continuous measurement and monitoring of liquid levels, which are suitable for various complex working conditions.

Suzhou Beite Smart Instrument Co., Ltd. was established in 2007.It is an automated instrument manufacturer integrating R&D, design, manufacturing, sales and system complete services.

After years of development, the company's new factory covers an area of ​​15 acres, with a workshop area of ​​4000m2. It has complete production and processing equipment. The electronics workshop has a modern SMT assembly line and a complete electronic design laboratory. The machinery workshop has multiple precision CNC lathes, ordinary lathes, CNC milling machines, fully automatic circumferential seam welding machines, drilling machines and other equipment. The calibration workshop has two liquid calibration test lines and one small and medium flow gas calibration test line. Each product has been actually calibrated and verified to ensure product quality.

The company has strict quality control in every aspect from product design, raw material procurement and processing, manufacturing and assembly, testing and inspection to product delivery, striving for zero defect products, and using scientific management, strict technology, sophisticated equipment, to ensure product quality. quality. The company's products, from hardware to software, all have the company's independent intellectual property rights.

The company's products are widely used in municipal administration, petroleum, chemical industry, metallurgy, pharmaceuticals, thermoelectric papermaking, food environmental protection and scientific research fields, and are exported to Southeast Asia, South America, Europe and other countries. Beite's integrity, strength and product quality have been recognized by the industry.

The company's main products include metal tube float (rotor) flowmeters, glass rotor flowmeters, plastic tube flowmeters, turbine flowmeters, thermal gas mass flowmeters, gas turbine flowmeters, intelligent electromagnetic flowmeters, vortex flowmeters, pipeline ultrasonic flowmeters, magnetic flap level meters, ultrasonic level meters, intelligent radar level meters, pressure transmitters, flow totalizers, batch control systems, etc. There are more than a dozen series and hundreds of varieties.