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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


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,BSPT（Can 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
Connection method		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
Whether the watch head is displayed with or not				D2				Head instantaneous flow display
Explosion-proof grade				E1				Non-explosion-proof type
Explosion-proof grade				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.

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