LFS71 Explosion-Proof Air Velocity Transmitter

PRODUCT FEATURES

High-precision MEMS micro-pressure core, high precision and wide operating temperature range
Clear LCD digital display
Zero button available on-site,Air velocity range adjustable
Strong stability and long service life
IP65 protection grade housing

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Description

Specification

Product Selection

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Description

LFS71 Explosion-proof Air Velocity Transmitter is suitable for gas flow measurement in Explosion-proof environments.It canconvert the flow rate of gas into an electrical signal and transmit it to the control system.The range can be adjusted on-sitethrough buttons,and theIP65 protection grade casing is used.It is suitable for energy management systems,VAV and fancontrol,environmental pollution control,smoke hood control,oven and boiler ventilation control and other fields.

Specification

Measurement medium	Air or neutral gas
Range	Air velocity:0~10 m/s,0~20 m/s,0~30 m/s,0~40 m/s(Range can be customized.)
Overload pressure	10KPa
Accuracy	±3.0%FS(Air velocity>3 m/s)
Working temperature	Main Unit:-20℃~70℃;Probe:-40℃~450℃
Compensation Temperature	-10℃~60℃
Storage Temperature	Main Unit:-40℃~80℃
Response Time	0.5s(default)/1.0s /2s /4s
Ingress Protection	IP65
Pressure Connection	Stainless steel 1/2″quick connection
Signal output	4~20mA/0~10VDC/RS485
Power Supply①	12~30VDC/24VAC±20%
Power Consumption	≤1.5W
Shell Material	Cast Aluminium
Communication	RS-485 standard interface,Modbus RTU protocol
Certificates	ROHS,CE
Explosion-Proof Grade	Ex db IIC T6 Gb
Display	LCD digital display
Weight(Approximate)	Main Unit:1238g

①When the product is powered by AC power,it is recommended to use an isolated AC power supply.

Product Selection

Code and Description				Remark
LFS71-				Model
	1	0~10m/s		Air Velocity range
	2	0~20m/s
	3	0~30m/s
	4	0~40m/s (L-type pitot tubes only)
	X	Customized
		A	4~20mA	Output Mode
		B	0~10VDC
		C	RS-485

LFS71-2A Range:0~20m/s,Output:4~20mA				Example

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Please carefully inspect the following products ordered from LEFOO when you receive them.If you do not meet your reservation requirements or find that the products have surface quality problems,please take photos and contact the sales engineer who served you.Once this kind of product is signed,within 7 days,the LEFOO product will maintain the original quality and function when it was sold,and the product itself,accessories,and trademark logos are complete,and you can return the product without reason.Within 30 days,accept the return application due to quality reasons.

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