Laminar differential pressure multivariable flow meters can display pressure, temperature, and flow rate.
When fluid (gas or liquid) flows in layers, the flow is described as laminar; when the fluid rotates and mixes across the pipe diameter, the flow is described as turbulent; flow between the two is described as transitional flow.
Laminar and turbulent flows are two major flow states of fluid motion. The mechanism of turbulent flow is still not fully understood, but differential pressure flow meters based on turbulent flow have been widely used. In contrast, laminar flow has been thoroughly studied, with well-established mathematical models and descriptive equations. In a laminar flow state, the flow velocity and differential pressure are proportional. Because the differential pressure is linearly related to the flow rate, our laminar differential pressure flow meter has high measurement accuracy over a very wide measurement range.
Laminar differential pressure flow meters measure the mass flow rate of a fluid using the pressure drop generated inside a laminar element. The laminar element converts turbulent flow into laminar flow by separating it into a series of thin, parallel channels. Because the flow is laminar, not turbulent, the pressure drop can be related to the volumetric flow rate using the Poiseuille equation. At a given temperature and pressure, the volumetric flow rate can be converted to mass flow rate using density correction. For high-temperature, low-temperature, and high-pressure operating conditions, real-time measurement of multiple variables such as temperature/pressure/differential pressure can compensate for the physical properties of the medium and achieve accurate flow measurement.
Our laminar differential pressure flow meter uses differential pressure, absolute pressure, and temperature sensors to measure and compensate for the flow rate, pressure, and temperature of gases, measuring the volumetric flow rate of gases under standard conditions (e.g., 1 ATM @ 25℃).
It can measure 4 parameters: mass flow rate, volumetric flow rate, temperature, and absolute pressure. Cumulative flow rate is optional and can be displayed simultaneously on the dynamic display screen.
Next page
Next page:
Related Products
Contact Information
Address: Room 1522/23, Building B, Ruichuang International Center, No. 8 Wangjingdong Road, Chaoyang District, Beijing (R&D Department)
Leave a message
If you are interested in our products, please leave your email address, and we will contact you as soon as possible, thank you!