Small flow measurement has always been a major challenge for many companies. This is mainly due to the characteristics of small flow and the complexity of the measurement environment, among other factors. In short, solving the problem of small flow measurement requires considering multiple factors comprehensively and taking various measures to improve measurement accuracy and stability.

Small flow measurement?can be divided into two situations. One is to accurately measure the flow of gas or liquid through small pipes with high precision. The other is to measure the flow rate of fluids that flow very slowly. There are many common gas flow meters suitable for measuring small flow rates, such as differential pressure, float, vortex, and thermal flow meters. Some of these gas flow meters are suitable for measuring medium to large flow rates as well as small flow rates, while others are specifically designed for measuring small flow rates, such as micro gas flow meters.

The MF4000 series gas mass flow meter?is designed specifically for measuring the flow rate of low-speed airflows in gas pipelines with diameters ranging from 3mm to 8mm. Its principle is based on the dependence relationship between the heat and mass transfer of flowing gases. By detecting the temperature changes generated upstream and downstream, the mass flow rate of the gas can be accurately obtained. The sensors in this series are made using microelectromechanical systems (MEMS) flow sensing chips and are suitable for various clean gases. The threaded and various quick-connect interfaces allow for easy mechanical interface conversion, meeting the requirements of various gas pipeline configurations. This product can be used in various industrial applications, such as process control and atmospheric sampling.

Features：

• Designed for measuring low-speed airflow in gas pipelines with diameters ranging from 3mm to 8mm, providing statistical recording of fluid data.
• Various easy-to-install and use connection options available.
• Flexible output options, allowing active data transmission through communication interfaces.
• Excellent performance on anesthesia machine electronic displays or data output queried from a host computer.
• Can also provide linear analog voltage output through analog interfaces.
• LED display for instantaneous flow rate and accumulated flow rate, with on-site parameter configuration using buttons.
• Ability to record maximum and minimum instantaneous flow rates since power-up, including an over-range function.
• High stability, accuracy, and excellent repeatability throughout the full range.

MEMS Chip for Stable and Reliable Measurement

The MF4000 series micro gas flow meter is equipped with a high-precision MEMS chip (microelectromechanical system) flow sensor, which is specifically designed for accurate measurement of micro gas flow. The core component is the MEMS chip, which integrates a micro heater and a thermopile. By measuring the temperature difference between the thermopiles upstream and downstream and combining the power of the heater, the mass flow rate of the gas can be precisely calculated.

Moreover, the MF4000 series micro gas mass flow meter adopts thermal mass flow measurement, eliminating the need for temperature and pressure compensation. Therefore, even in environments with large temperature and pressure variations, the flow meter can provide accurate and stable measurement results.

LED Numeric Display for Intuitive Readings

The MF4000 series micro gas mass flow meter is equipped with an LED display screen that shows real-time instantaneous flow rate and accumulated flow rate. It allows on-site configuration of flow meter parameters using buttons.

With features like high brightness, high contrast, and fast response time, the LED display ensures clear visibility of the readings even in poorly lit environments. This guarantees that users can promptly obtain the latest flow information, intuitively understand the current gas flow conditions, and track the cumulative total of gas flow, providing robust data support for decision-making and monitoring.

RS485 Module for Multiple Output Options

The MF4000 series gas mass flow meter is an outstanding flow measurement device that supports multiple output options, providing great convenience and flexibility for users.

It supports RS-232/485 communication output, enabling seamless connection with computers, PLCs, or other devices for real-time data transmission and sharing.

Analog output is also available, allowing users to choose linear analog voltage or current signals through an analog interface to adapt to traditional control systems or data acquisition devices.

Data can be actively uploaded through the communication interface or queried by a host computer. Additionally, the flow meter can provide automated management through a linear analog voltage range of 0.5V-4.5V, facilitating centralized control and remote transmission.

Wide Range Ratio for High Accuracy and Precision Measurement

The MF4000 series gas mass flow meter has a range ratio of up to 100:1, achieving multiple sensor integration on a single chip. This versatility enables accurate measurement across a wider range of flow rates, whether it is low flow or high flow. It allows the flow meter to adapt to various application scenarios, including gas sampling, process control, and environmental monitoring, among others.

At the same time, the MF4000 series gas mass flow meter employs advanced sensing technology and algorithms, ensuring the accuracy and stability of measurement results. The measurement accuracy can reach ±(1.5+0.2FS)%, providing users with a reliable and efficient solution for gas flow measurement.

Applications

Due to its unique design and performance characteristics, the MF4000 series flow meter?is suitable for various application fields. Here are the main application areas of the MF4000 series flow meter:

Industrial Automation:?In the field of industrial automation, the MF4000 series flow meter is commonly used for gas flow control, production line monitoring, and process optimization. It accurately measures gas flow to help achieve stable operation and efficient production in automated production lines.

Environmental Monitoring: The MF4000 series flow meter is widely applied in environmental monitoring for measuring gas flow in scenarios such as atmospheric sampling and emission control. It helps monitor air quality, assess pollutant emissions,and ensure compliance with environmental regulations.

Laboratory and Research: In laboratory and research settings, the MF4000 series flow meter is used for precise gas flow measurement in experiments, analysis, and scientific research. It provides accurate data for research studies, quality control, and process optimization.

Medical and Pharmaceutical: The MF4000 series flow meter finds applications in medical and pharmaceutical industries for measuring gas flow in areas such as anesthesia delivery, respiratory therapy, and gas chromatography. It ensures accurate and controlled gas flow rates for patient care and pharmaceutical manufacturing processes.

Semiconductor Manufacturing:?In semiconductor manufacturing processes, the MF4000 series flow meter is utilized for precise control and monitoring of gas flows in various stages of production. It helps maintain process stability and quality control in semiconductor fabrication.

Energy and Utilities: The MF4000 series flow meter is suitable for energy and utilities applications, including natural gas measurement, fuel gas monitoring, and energy management systems. It enables accurate measurement of gas flow rates in energy production and distribution processes.

Overall, the MF4000 series micro?gas flow meter?offers a reliable solution for small flow measurement applications. With its high-precision MEMS chip, intuitive LED display, multiple output options, and wide range ratio, it provides accurate and stable measurements across various industries. Whether it’s for industrial automation, environmental monitoring, laboratory research, medical applications, semiconductor manufacturing, or energy and utilities, the MF4000 series flow meter ensures precise and dependable gas flow measurement.