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LKM Thermal Gas Mass Flow Controller

Gas mass flow controller (MFC) is used for accurate measurement and control of gas mass flow.Widely used in oil, gas, chemical, smelting, energy and other fields.The size of the sensor has been reduced to micron level and the sensitivity of the flow meter has been greatly improved by adopting microelectromechanical system chip processing technology, large-scale integrated circuit production technology and material growth technology.

  • Product Origin:

    China
  • Shipping Port:

    Huangpu port
  • Lead Time:

    Spot
  • MOQ:

    1
Product Details

Features

■Using microelectromechanical system chip processing technology and mass integrated circuit production technology and material growth technology, the size of the sensor has been reduced to micron level, which greatly improves the sensitivity of the flowmeter.

■ Multi - sensor integration is realized on a single chip, which greatly improves the measuring range ratio ( range degree ) of the flowmeter.

■ The zero point stability of the sensor is greatly improved compared with the traditional thermal mass flowmeter.

■ Combined with the microcomputer intelligent technology of the secondary instrument, the flowmeter has good repeatability, and the measurement is accurate and reliable.

■The simplified structure brought by technological progress makes the flow meter greatly reduce the pressure loss compared with the traditional mechanical instrument, and greatly reduces the energy consumption.

■ Micro power consumption design.Use LCD to display instantaneous flow rate and accumulated flow rate, clear and intuitive, easy to read.

■The product integrates electromagnetic compatibility design technology and has higher anti-interference ability.

■The flow meter is equipped with RS485 communication module, which can be centrally managed with the host computer network.


Product technical index and selection

1.Product technical index                                                                                                Table 1

       

       Product model selection 1


           Product model selection 2         

Model

LKM2120

LKM2190

LKM3030

LKM3060

LKM3080

LKM3120

LKM3190

Diameter DN

12mm

19mm

3mm

6mm

8mm

12mm

19mm

Flow range

:L/Min

0.3-300

0.8-800

0.15-50

0.5-50

1.2-120

3-300

8-800

Range ratio

100:1

Precision

±(1.5+0.5FS)%

Repeatability

±0.75

Maximum working pressure

MPa


1.0


1.5

Working temperature

-10~55

Humidity

<95%RH(No ice, no dew

Working power supply

8-24Vdc,35mA

8-24Vdc,35mA

Output

4-20mA;RS485;pulse

Mechanical interface

NPT,BSPTCan be customized according to user needs

Repeatability precision

(%F·s)


±0.2%F.S

Input and output signal voltage


0 ~ +5.00V

Power supply

+15V±5%50mA,-15V±5%200mA

Working pressure range

(MPa)


0.05 ~ 0.3

Accuracy

(%F·s)

±1%F.S(20,30SLM ±2%F.S)

Repeatability precision

(%F·s)


±0.2%F.S

Flow range

0~5,10,20,30,50,100,200,300,500SCCM

0~1,2,3,5,10,20,30 50 100 500 1000SLM


2、Instrument selection                                            

                                                                                                                                  Table 2

Model code

Thermal gas mass Flowmeter

LKM2

-¨

¨

¨

¨

¨

¨

¨

Code description

LKM3

-¨

¨

¨

¨

¨

¨

¨

Diameter

03

DN3mm

06

DN6mm

08

DN8mm

12

DN12mm

19

DN19mm

Connection method

0

Standard

1

N-NPT(Can be customized according to user needs)

Output signal

C1

4-20mA

C2

Pulse

C3

RS485

Whether the watch head is displayed with or not

D1

No display at the head

D2

Head instantaneous flow display

Explosion-proof grade

E1

Non-explosion-proof type

E2

Explosion-proof type




Measuring gas medium

F1

Air

F2

Oxygen

F3

Nitrogen

F4

Argon

F5

Carbon dioxide

F6

Sky oxygen


Product structure size and installation

1.Structure size

LKM shape and installation dimensions are shown in the figure:

Shape and mounting dimensions

                                                                                                                           Table 3

Model specification

Diamete

d(mm)

Interface

L(mm)

H(mm)

W(mm)

C(mm)

LKM3030

3

1/8

96

125

35

36

LKM3060

6

1/4

104

127

35

36

LKM3080

8

3/8

106

134

35

50

LKM3120/LKM2120

12

1/2

142

137

40

50

LKM3190/LKM2190

19

3/4

182.5

150

40

70

2、Product installation

This product is recommended for horizontal installation.The arrow on the base indicates the direction of medium flow.The media inlet and outlet port connection must be correct, and the inlet side shall be equipped with a high efficiency filter.

Installation steps:

(1)After taking out the flowmeter, check its appearance to make sure there is no loss;

(2)Connect and clean pipes;

(3)Install the flowmeter on the pipe and note the following;

①In order to ensure the measurement accuracy of the Flowmeter, the upstream end of the Flowmeter should be connected first, the upstream straight section should meet the minimum requirement of 10DN, and the downstream straight section should meet the minimum requirement of 5DN;

②When the flowmeter is installed, it shall not contain any sealing material;

(4)Connect the power cable, pay attention to the polarity of the connection, and make sure the input dc voltage is at (5~12) VDC;

(5)If it is necessary to connect the signal line, make sure that the signal line is correctly connected to the corresponding user interface;

(6)Turn on the power and the LCD display is correct;

(7)Open the upstream and downstream valve of the pipeline and the flowmeter begins to measure the gas flow in the pipeline.

A free consultation

Email us with any questions or inquiries or use our contact data. We would be happy to answer your questions.

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