Product Introduction

The G4 microelectronic thermal gas mass flowmeter is a new generation of civilian gas flowmeter that uses the thermal "energy balance" principle of gas mass flow sensors for measurement. The mass and velocity of the fluid flowing through the flowmeter are directly related to the gradient of the temperature field on the sensor. Under natural convection (with zero velocity) conditions, the temperature field on both sides of the sensor's micro heat source is symmetrically distributed, and the temperature difference is zero; When gas flows through the sensor, it will take away heat. The asymmetric distribution of temperature field shows that the faster the flow rate, the greater the heat taken away; Similarly, the higher the density of a gas, the greater its specific heat capacity, and the more heat it carries away, resulting in a larger temperature difference. The flow rate of the gas can be measured by the temperature difference at both ends; Not affected by environmental temperature and pressure, thus achieving precise measurement.

Main functions of the product:

Accurate measurement, widely applicable to the measurement of clean gases such as natural gas (GB 17820-1999), liquefied petroleum gas (GB 11174-1997), air, and inert gases (excluding hydrogen) that comply with national standards

■ Support prepaid and anti-theft measures

■ Support remote automatic meter reading

Leakage detection alarm (high-precision low flow measurement)

■Automatic valve closure for excessive flow (processing circuit handling)

■Seismic induction, automatic valve closing (sensor characteristics)

Product Features:

G4 microelectronic thermal gas mass flowmeter is a new generation of gas metering product developed based on microelectromechanical structure. It is a new type of gas meter that uses MEMS chips to sense gas flow rate for measurement. The MEMS chip collects the mass flow signal of the gas, which is independent of temperature and pressure. Has the following characteristics:

■Quality flow measurement, more fair settlement, and larger range of measurement;

■Rich access interfaces are conducive to the expansion of intelligent applications;

■Instantaneous flow and cumulative flow output, monitoring very little flow;

■The volume is only 1/2~/10 of the same flow rate membrane meter, or even smaller;

■The measurement accuracy will not deteriorate with the increase of usage time

■No pressure temperature compensation device is required;

■Silent design, no noise;

■The pressure loss is very low, with a built-in valve of about 130Pa;

■A larger operating temperature range of -25 ℃ to+55 ℃.

Gas meters are divided into forward and reverse meters according to the direction of inlet and outlet. The gas meter adopts a bypass structure, allowing most of the gas to pass through the main pipeline, ensuring that the chip is not affected by dust and other debris in the bypass.

Applicable gases:

The G4 microelectronic thermal gas mass flowmeter is widely used for measuring clean gases such as natural gas (GB 17820-1999), liquefied petroleum gas (GB 11174-1997), air, and inert gases (excluding hydrogen) that comply with national standards.

Technical Specifications: