High Accuracy Digital DN15-2000mm Thermal Mass Flow Meter

Overview

The High Accuracy Digital DN15-2000mm Thermal Mass Flow Meter is a sophisticated industrial instrument designed for precise gas measurement across a wide range of pipe sizes. Built on the advanced principle of thermal diffusion, this meter utilizes the constant temperature difference method to provide reliable, real-time data for modern factory automation.

The thermal gas mass flow meter is designed based on the principle of thermal diffusion, which uses the constant temperature difference method to accurately measure the gas. The utility model has the advantages of small volume, high digitization degree, convenient installation and accurate measurement.

The sensor part consists of two reference grade platinum resistance temperature sensors. When the instrument is working, one sensor continuously measures the medium temperature T1; the other sensor self-heats to the medium temperature T2, which is used to sense the fluid flow rate, called the speed. sensor. The temperature ΔT=T2-T1, T2>T1, when there is fluid flowing, the gas molecules collide with the sensor and take away the heat of T2, so that the temperature of T2 is lowered. To keep ΔT unchanged, it is necessary to increase T2. The supply current, the faster the gas flow rate, the more heat is removed, and the gas flow rate and the added heat have a fixed function relationship. This is the principle of constant temperature difference.

Working Principle: The Constant Temperature Difference Method

Our thermal gas mass flow meter operates with high digitization and precision by employing two reference-grade platinum resistance temperature sensors:

1. Medium Temperature Sensor (T1): This sensor continuously monitors the actual temperature of the gas medium.

2. Velocity Sensor (T2): This sensor self-heats to a temperature higher than the medium (T2 > T1), creating a specific temperature difference (ΔT = T2 - T1).

How it works:

As the fluid flows, gas molecules collide with the velocity sensor, carrying away heat and lowering the temperature of T2. To maintain a constant ΔT, the system automatically increases the supply current to T2. The faster the gas flow rate, the more heat is removed. Because there is a fixed functional relationship between the added heat and the flow rate, the meter achieves highly accurate measurement of the gas mass flow.

Key Features & Technical Advantages

• Broad Pipe Size Compatibility: Engineered for versatility, supporting pipe diameters from DN15 up to DN2000mm, suitable for both small-scale tubing and large industrial ducting.

• High Digitization Degree: The digital design ensures stable signal processing, easy calibration, and seamless integration into control systems.

• No Temperature & Pressure Compensation: By measuring mass flow directly, the utility model simplifies installation and reduces the cost of external sensors.

• Compact & Lightweight Design: It features a small volume, making it ideal for installations where space is limited.

• Convenient Installation: The sensor's robust design allows for quick setup and low maintenance requirements in diverse field conditions.

Technical Specifications

Applications

From compressed air monitoring to large-scale flue gas measurement, the DN15-2000mm series provides the accuracy needed for:

• Industrial gas distribution (Nitrogen, Oxygen, Argon).

• Natural gas and flare gas monitoring.

• Environmental protection and emission control.