Small flow gas flowmeter selection, which is better? Small flow gas flowmeters use turbines for measurement. It first converts the flow rate into the turbine's speed, and then converts the speed into an electrical signal proportional to the flow rate. This flowmeter is used to detect instantaneous flow rate and total integrated flow rate, and its output signal is frequency, which is easy to digitize. The induction coil and the permanent magnet are fixed to the housing. When a ferromagnetic turbine blade passes through a magnet, the magnetoresistance of the magnetic circuit changes, resulting in an induced signal. The signal is amplified and shaped by an amplifier and sent to a counter or frequency meter to display the total integrated flow rate. At the same time, the pulse frequency is converted by frequency-voltage to indicate the instantaneous flow rate. The speed of the impeller is proportional to the flow rate, and the number of revolutions of the impeller is proportional to the total amount of flow. The output of the turbine flowmeter is a frequency modulation signal, which not only improves the anti-interference of the detection circuit, but also simplifies the flow detection system. Its range ratio can reach 10:1, and the accuracy is about ± 0.2%. The time constant of the turbine flowmeter with small inertia and small size can reach 0.01 second.

Small flow gas flowmeters are widely used in petroleum, organic liquids, inorganic liquids, liquefied gas, natural gas and low temperature fluids.

The output signal of the turbine flowmeter is a pulse signal, which is easy to digitize. Turbine flowmeter has the characteristics of small pressure loss, blade anticorrosion, viscosity and corrosion measurement, small flow gas flowmeter is widely used in petroleum, chemical industry, metallurgy, scientific research and other fields of measurement and control system. Small flow gas flowmeters with sanitary fittings can be used in the pharmaceutical industry.

The structure of the integrated small flow gas flowmeter is explosion-proof design, which can display the total flow rate, instantaneous flow rate and full flow percentage. The battery uses long-term lithium battery. The battery life of the single-function integrator can reach more than 5 years, and the battery life of the multi-function display instrument can reach more than 12 months.

The integrated meter head can display a large number of flow units, including cubic meters, gallons, liters, standard cubic meters, standard liters, etc., and can set fixed pressure and temperature parameters to compensate for gas. When the pressure and temperature parameters change little, the instrument can be used for fixed compensation accumulation.