I Introduction

 The 3151TLT liquid level transducer adopts static pressure principle to measure the liquid level, which is applied in industry control or liquid level measurement, it has higher performance with analog and digital output. Through installation flange or other connection method, the transducer can be directly installed on the tank body to get accurate pressure, pressure differential and liquid level. It can meet your needs of liquid level measurement. The single flanged liquid level transducer is of advance design, complete in specifications, easy installation, etc.:

1. The installation and operation of single flanged liquid level transducer is easy, it also has better interchangeability.

2. It is applied in the measurement of liquid level of liquid medium in containers. Besides onsite indication, it also has remote transducer, alarm switch and inspection functions.

3. The single flanged liquid level transducer is explosion proof and isolation, and it can be applied in places of danger.

4. The single flanged liquid level transducer is of simple structure, easy installation and maintenance, corrosion and explosion proof.

5. The transducer is completely isolated from mediums to be measured, it has good sealing performance, reliability and safety in use.

6. It is of high sensitivity, fast response, it can correctly reflect the minor changes of flowing or static liquid level with high accuracy.

7. Its measurement range is wide, and is not be limited by the height of storage tank or container.

 II Technical Performance

 Application object:   liquid, gas or steam

Measurement range:  referred to the selection table

Output signal:       4~20mA DC output, integrated with digital signal of HART protocol

Power:   external power, 24V DC, volt range: 12V~ 45V

Installation in places of danger:       explosion proof isolation type dIICT5

                                Intrinsic Safety Explosion proof iaIICT5

Transfer characteristics:  the automatic transfer can be done through handheld communicator or buttons after installation.

Temperature range:

       Electronic board        -40~85℃ 

       Sensitive element       -40~104℃ 

       Digital display         -25~65℃ (normal working)

                            -40~85℃ (non damaged)

Relative humidity              0~95%

Over pressure limit:  the transducer can work under the range of 2~5 times of regular, it also comply with flange pressure regulations.

Damp: the time constant is between 0.2~32.0 s

Starting time: 3s with no warm-up

 III Technical Specification

(Under the environment of no transfer, 316 stainless steel isolation diagram and other test standards)

Accuracy: ±0.1%, ±0.2%

Stability: ±0.25% of max measurement range /6months

Temperature impact:  the error at 0℃ is ±0.5% of max measurement range /55℃ 

Power impact: less than 0.0005% of output range /V

Vibration impact: at any coaxial directions, the frequency is 200Hz, the error is ±0.5% of max measurement range /g

Load impact: there is no load impact within working area as long as the input voltage is higher than 12V.

Installation position impact: Due to self-pressure of pressure transmitting medium, the installation position will impact a lot, such problem can be corrected by zero setting.  

 IV  Application Selection

 The transducer is a common liquid level transducer in industry control, and widely applied in all kinds of automatic control system, such as aerospace, military, petrochemical, oil wells, power, ship and vessel, construction materials, pipelines etc., generally it is used to measure the liquid level or pressure differentials or pressure.

The medium to be measured and leaded by pressure-leading pipe is liable for solidification and crystallization.

The medium to be measured containing suspended solid or too thick is liable for jam of pressure-leading pipe.

The medium to be measured is not conducive to measurement in case of high temperature or corrosive

The medium to be measure should not be contaminated and keep hygiene  

 Selection notice

The user should have clear understanding about the temperature, corrosivity of medium to be measured, measurement range, explosive proof or not, if the oil prohibition process is required, the medium is liable for crystallization or not, etc.