Lefoo Explosion-Proof Air Velocity Transmitter LFS71

Name: Explosion-Proof Air Velocity Transmitter LFS71
Brand: LEFOO INDUSTRIAL CO.,LTD.
Rating: 4.8 (50 reviews)

LFS71 Explosion-proof Air Velocity Transmitter is suitable for gas flow measurement in Explosion-proof environments. it can convert the flow rate of gas into an electrical signal and transmit it to the control system. The range can be adjusted on-site through buttons, and the lP65 protection grade casing is used. it is suitable for energy management systems, VAV and fan control, environmental pollution control, smoke hood control, oven and boiler ventilation control and other fields.

Features

* High-precision MEMS micro-pressure core, high precision and wide operating temperature range;

* Clear LCD digital display

* Zero button available on-site, wind speed range adjustable

* Strong stability and long service life

* lP65 protection grade housing

Get a Quote PDF Download

Transmitter

Pump

Specification
Features
Applications

Specification of Explosion-Proof Air Velocity Transmitter LFS71

Medium	Air or neutral gas
Range	Speed: 0~10 m/s,0~20 m/s,0~30 m/s, 0~40 m/s (Range can be customized.)
Over Voltage	10KPa
Accuracy	±3.0%FS(Speed >3 m/s)
Operating Temperature	Host machine: -20℃~80℃; Probe: -40℃~450℃
Compensation Temperature	-10℃~60℃
Storage Temperature	Host machine: -40℃~85℃
Response Time	0.5s (default) /1.0s /2s /4s
Protection Grade	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	EXd IIC T6 Gb
Display	LCD digital display
Weight (Approximate)	Host machine: 1238g

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

Features Explosion-Proof Air Velocity Transmitter LFS71

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

Applications of Explosion-Proof Air Velocity Transmitter LFS71

Suitable for gas flow measurement in Explosion-proof environments:

Energy management systems
VAV and fan control
Environmental pollution control
Smoke hood control
Oven and boiler ventilation control

Product Inquiry

News & Blog

08 Oct 2026
LEFOO High-Temperature Brushless DC Water Pump for Multiple Applications
The brushless DC circulation water pump is used for Water Heaters and Smart Toilets and other applications.
15 Sep 2026
LEFOO Washdown Pump For a Wide Range Of Flushing Applications.
The pump is used for clean water rinsing, medical-grade purified water, endoscopes, floor scrubbers, and other applications.
08 Sep 2026
LEFOO Showcases Pumps and Sensors at the 139th Canton Fair
GUANGZHOU, CHINA LEFOO presented its pumps, sensors and pressure switches at the 139th China Import and Export Fair (Canton Fair) in Guangzhou, China,
24 Aug 2026
Demand Delivery Pump vs. Booster Pump: What Is the Difference?
Demand Delivery Pump vs. Booster Pump: Key Differences | LEFOOA delivery pump and a booster pump can both move water and increase pressure, which is why the two are sometimes confused during equipment...