Plug in thermal mass flowmeter is an instrument widely used in the field of industrial measurement, mainly for measuring the mass flow rate of gases or liquids.
Manufacturer of plug in thermal gas mass flowmeter
The plug-in thermal gas mass flowmeter sensor can be installed and maintained online. The installation process is to first weld a base with external threads on the outer wall of the pipeline, install a 1-inch stainless steel ball valve on the base, and then use a special tool to drill a hole with a diameter of 22mm in the pipeline. After drilling, remove the special tool, and finally install the sensor on the valve and insert it into the center of the pipeline (the insertion position of the sensor is determined at the factory).
The plug-in thermal gas mass flowmeter sensor can be installed and maintained online. The installation process is to first weld a base with external threads on the outer wall of the pipeline, install a 1-inch stainless steel ball valve on the base, and then use a special tool to drill a hole with a diameter of 22mm in the pipeline. After drilling, remove the special tool, and finally install the sensor on the valve and insert it into the center of the pipeline (the insertion position of the sensor is determined at the factory).
Thermal gas mass flowmeter is an instrument that uses the principle of thermal diffusion to measure gas flow rate. The sensor consists of two reference level thermal resistors (RTDs). One is the speed sensor RH, and the other is the temperature sensor RMG that measures changes in gas temperature. When these two RTDs are placed in the measured gas, the sensor RH is heated, and the other sensor RMG is used to sense the temperature of the measured gas. As the gas flow rate increases, the airflow carries away more heat, and the temperature of the sensor RH decreases.
Advantages of plug-in thermal gas mass flowmeter
- Easy installation, simple maintenance, bidirectional detection, anti vibration;
- Up to 24 point flow measurement;
- Correction of multi-point nonlinear curves for output analog signals;
- Wide range ratio 100:1;
- Simultaneous detection of flow and temperature, switching display;
- Large caliber small flow measurement, capable of leak detection;
- Using proprietary technology “dual balanced structure” to package sensors;
- Exclusive high humidity and high temperature algorithm, with medium temperature up to 500 ℃;
- Direct quality flow detection without temperature and pressure compensation;
| property | Technical parameter | |
| Structural form | plug-in | pipelined |
| Measuring medium | All gases (except acetylene) | |
| Pipe diameter range | Caliber DN32 or higher | DN15～DN200mm |
| Velocity range | 0.1～120Nm/s | |
| precision | ±1～2.5% | |
| Operating temperature | Sensor: -40℃ ~ +120℃ Converter: -20℃ ~ +45℃ | |
| Working pressure | Medium pressure ≤2.5Mpa | Medium pressure: 4.0Mpa |
| Power supply | DC24V or AC220V≤18W | |
| Response speed | 1s | |
| Output signal | 4-20mA (photoelectric isolation, maximum load 500Ω), pulse, RS-485 (photoelectric isolation), HART protocol | |
| Give an alarm | 1-2 relay normally open contact, 10A/220V/AC, 5A/30V/DC | |
| Type of supply | Separate structure, integrated structure | |
| Pipe material | Carbon steel, stainless steel | |
| Field display | Four lines of Chinese liquid crystal display | |
| Display content | Mass flow, standard volume flow, cumulative flow, standard time, cumulative running time, standard flow rate, etc | |
| Class of protection | IP65 | |
| Sensor material | Stainless steel | Stainless steel, carbon steel |
Application fields of plug-in thermal gas mass flowmeter
Measurement of multi-component gases such as oxygen, nitrogen, hydrogen, chlorine, aeration, and gas
★ Measurement of blast furnace gas and coke oven gas
★ Aeration and chlorine gas measurement in biogas and water treatment
★ Compressed air measurement
★ Flow measurement of natural gas, liquefied gas, torch gas, and other gases
Measurement of primary and secondary air flow in power plant blast furnaces
★ Flow measurement of underground ventilation or exhaust system
★ Air flow measurement during gas process
★ Measurement of gas flow rate in calcination furnace pipeline
Gas flow measurement during the production process of cement and glass factories
★ Gas flow measurement in solvent recovery system
★ Gas flow measurement during semiconductor chip manufacturing process
Measurement of carbon dioxide gas flow rate during beer production process
★ Measurement of gas flow rate (velocity) in heating, ventilation, and air conditioning systems