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LFS73 Explosion-proof & High-temperature integrated Air Velocity/Air Volume Transmitter is a kind of transmitter suitable for high temperature explosion-proof environment of gas flow measurement, it can convert the flow rate / flow of gas into electrical signals, and transmit it to the control system. Measurement range can be adjusted through the button on site. Using IP65 protection housing, which is suitable for energy management system, VAV and fan control environmental pollution control, smoke cover control, oven and boiler ventilation control and other fields.
Features
* With high-precision MEMS micro-pressure core;
* Wide working temperature range and high accuracy;
* LCD digital display screen;
* Perfect overvoltage and reverse protection, high long-term reliability;
* Adjustable measurement range;
* Strong stability and long service life;
* IP65 protection housing.
| Explosion-Proof & High-Temperature Integrated Air Velocity Air Volume Transmitter LFS73 | |
| Measurement Medium | Air or neutral gas |
| Range | Air velocity : 0~30m/s (range can be adjusted between 5 ~ 30m/s) 0~100m/s (range can be adjusted between 35 ~100m/s) Air volume : customized air volume(Max.99999m3/h) |
| Overload Pressure | 10KPa(0-30m/s); 80KPa(0~100m/s) |
| Accuracy① | ± 3.0%FS (Air velocity > 3m/s) |
| Working Temperature | Main Unit : -20℃~70℃; probe : -40℃~450℃ |
| Compensation Temperature | -10℃~60℃ |
| Storage Temperature | Main Unit : -40℃~80℃ |
| Response Time | 0.5s / 1.0s (default) / 2s / 4s |
| Ingress Protection | IP65 |
| Electrical Interface | Six-core wire, cable diameter of 8mm |
| Output Signal | 4~20mA & 0~10VDC & RS485 |
| Power Supply➁ | 12~30VDC / 24VAC ±20% |
| Power Consumption | ≤1.5W |
| Shell Material | Cast aluminium |
| Communication | RS-485 standard Interface, Modbus RTU protocol |
| Certification Project | ROHS, CE |
| Explosion-proof Grade | Ex db lIC T6 Gb |
| Display | LCD backlit digital display |
① Environmental conditions: temperature: 20℃,humidity: 45% RH, atmospheric pressure: 1035 hPa.
➁ When the product uses the AC power supply, it is recommended to use the isolated AC power supply.
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| Wire Function | Color | Wire Instructions | Remarks |
| V+ | Red | Positive terminal | |
| V- | Black | Negative terminal | |
| 485A | Green | 485 Communication interface | For different output, Only reserve needed wires. |
| 485B | White | ||
| Vout | Brown | 0-10VDC voltage output port, connect to Power+ of the multimeter, and the other end of the multimeter connect to V- | |
| Iout | Yellow | 4-20mA current output port, connect to Power+ of the multimeter and the other end of the multimeter connect to V-. |
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① For T30/T45 products, the probe is equipped with a heat sink by default, and the length of the heat sink is about 10cm., Cold end length refers to the length from the product host to the installation pipeline.
With high-precision MEMS micro-pressure core;
wide working temperature range and high accuracy;
LCD digital display screen;
Perfect overvoltage and reverse protection, high long-term reliability;
Adjustable measurement range;
Strong stability and long service life;
IP65 protection housing.
The LFS73 Explosion-proof & High-temperature Integrated Air Velocity/Air Volume Transmitter is designed for use in environments where high temperatures and explosive gases are present. Its primary application areas include:
Energy Management Systems: It is used to monitor and control airflow to optimize energy consumption.
VAV (Variable Air Volume) and Fan Control: The device is employed to regulate airflow in HVAC systems, ensuring efficiency in air handling and ventilation.
Environmental Pollution Control: It helps measure and control air quality in industries where pollution control is crucial, ensuring compliance with environmental standards.
Smoke and Fire Control: Used in smoke extraction systems, the LFS73 helps control airflow in ventilation systems for safety in case of fire.
Oven and Boiler Ventilation: The transmitter is ideal for ensuring proper airflow in high-temperature environments such as industrial ovens and boilers, preventing overheating or inefficient combustion.
These features make it a versatile and critical tool in various high-risk, temperature-sensitive industrial applications.
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