Single flange liquid level differential pressure transmitterYK-3051

Suitable Medium

Liquid, gas

Unsuitable Media


Model 3051 flange type liquid level transmitter is a new type of transmitter produced by our company with the introduction of foreign advanced technology and equipment. The key raw materials, components and parts are all imported. The whole machine has been strictly assembled and tested. The flange The liquid level transmitter has the characteristics of advanced design principles, complete varieties and specifications, and easy installation and use.



Because the appearance of this model completely integrates the structural advantages of the two most popular and widely used transmitters (Rosemount 3051 and Yokogawa EJA), it gives users a refreshing feeling, and it is in line with the traditional series. The product can be directly replaced in installation, and has strong versatility and substitution capabilities. In order to be suitable for the continuous improvement and development of the domestic automation level, in addition to the design of the flange type liquid level transmitter is small and exquisite, it also introduces the intelligent function with the HART fieldbus protocol.

The two pressures of the measured medium enter the high and low pressure chambers and act on the isolation diaphragms on both sides of the delta element (ie the sensitive element), and are transmitted to both sides of the measurement diaphragm through the isolation sheet and the filling liquid in the element. The electrodes on the measuring diaphragm and the insulating plates on both sides each form a capacitor. When the pressures on both sides are inconsistent, the measurement diaphragm will be displaced. The displacement is proportional to the pressure difference. Therefore, the capacitances on both sides are not equal. Through the oscillation and demodulation link, it is converted into a signal proportional to the pressure.


Product simulation features:

● High precision

● The range and zero point are continuously adjustable externally

● Good stability

● Positive migration can reach 500%, negative migration can reach 600%

● Two-wire system

● Adjustable damping, overvoltage resistance

● Solid sensor design

● No mechanical moving parts, less maintenance

● Light weight (2.4kg)

● The whole series of unified structure, strong interchangeability

● Miniaturization (166mm total height)

● Diaphragm material that contacts the medium is optional

● Unilateral overpressure resistance

● Low-pressure cast aluminum alloy shell

Intelligent product features:

●Super measurement performance, used for pressure, differential pressure, liquid level, flow measurement

●Digital accuracy: + (-) 0.05%

●Simulation accuracy: +(-)0.75%+(-)0.1%F.S

●Full performance: +(-)0.25F.S

●Stability: 0.25% for 60 months

●Turndown ratio: 100:1

●Measuring rate: 0.2S

●Miniaturized (2.4kg) all stainless steel flange, easy to install

●The process connection is compatible with other products to achieve the best measurement

●The only sensor in the world that adopts H alloy sheath (patented technology), which achieves excellent cold and thermal stability

●Intelligent transmitter with 16-bit computer

●Standard 4-20mA, with digital signal based on HART protocol, remote control

●Support the upgrade to fieldbus and technology based on field control.

YK-1151/3351LT flange type liquid level transmitter can accurately measure liquid level and density of various containers. There are flat flanges and plug-in flanges for selection. The flanges are 3 inches or 4 inches. There are flanges of 1501b and 3001b in specifications, and flanges can also be customized according to users, and flange diaphragm materials are optional. For specific dimensions, please consult the sales department or refer to the relevant sample book of our company.

Measuring range:   

Differential pressure: 0-6.2-690KPa

Static pressure: 2.5MPa


Measuring performance

Used for pressure, differential pressure, liquid level, flow measurement



Full performance




Turndown ratio


Measuring rate


Process connection is 

compatible with other 


Achieve low error measurement

The output voltage

Standard 4-20mA, with digital signal based on HART protocol

Other Products


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