In the field of industrial automation and process control, liquid level measurement is a key link to ensure production safety and efficiency. The LFT3020 immersion level transmitter launched by LEFOO has become an ideal choice for industries such as petroleum, chemical, power, urban water supply, and hydrological exploration due to its performance, flexible configuration, and reliable protection design

The LFT3020 uses high-performance pressure sensors as its core measuring components. By detecting the hydrostatic pressure of the liquid proportional to the depth of the liquid level, it converts it into a standard electrical signal output (4~20mA, 0~10V, 0~5V, 0.5~4.5V or RS-485), achieving accurate and continuous measurement of the liquid level. This product has a compact structure and is easy to install. It can be directly put into liquid and is suitable for liquid level monitoring and control of various liquid media.

1、 Core Features

• high-precision measurementAdopting oil filled diffused silicon core, it has excellent temperature compensation performance and maintains high accuracy in a wide temperature range of -20 ℃ to 85 ℃.

• Multiple protection designThe top stainless steel anti blocking protection head is detachable for easy maintenance; Optional built-in filter to effectively prevent impurities from damaging the sensor membrane.

• Waterproof and breathable structureMulti layer waterproof and breathable design effectively suppresses the influence of condensation water, while balancing IP68 high protection level and measurement stability.

• Flexible output and power supplySupports multiple wiring methods such as two-wire, three wire, and four wire, adapting to the signal and power requirements of different industrial sites.

2、 Technical parameters

• measurement range: 0~0.5 to 200 mH ₂ O

• Comprehensive accuracy：

• ± 0.5% F.S. (range 0~1 to 200mH ₂ O)

• ± 1.0% F.S. (range 0~0.5 to 1mH ₂ O)

• long-term stability<0.5% F.S./year

• Operating Temperature：-20℃ ~ 85℃

• Media compatibilitySuitable for liquids compatible with 304/316L stainless steel, fluororubber, and nitrile rubber

• Protection level：IP68

• certification standardCompliant with ROHS and CE EU electrical safety standards

3、 Flexible selection

LFT3020 supports a wide range of configuration options, and users can choose the range, output signal, accuracy level, line length, filter specifications, etc. according to their actual needs. For example, the model "LFT3020 0~200 M A4 0.5 M N T 1.0 LN" represents a plug-in installation model with a range of 0~200 meters, 4~20mA output, accuracy of 0.5%, direct output, no filter, and a line length of 1.0 meter.

4、 Application Fields

• Liquid level monitoring of petrochemical storage tanks

• Urban water supply and sewage treatment system

• Power plant water level control and protection

• Hydrological exploration and river water level recording

• Industrial process liquid level closed-loop control

The LFT3020 input type liquid level transmitter combines high precision, strong protection, and flexible configuration, making it a reliable solution for industrial liquid level measurement applications. Whether in harsh industrial environments or long-term unmanned monitoring stations, LFT3020 can provide stable and reliable data support, helping users achieve intelligent and efficient liquid level management.