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Specification of Explosion-Proof & High-Temperature Integrated Air Velocity Air Volume Transmitter LFS73

Technical parameter

Explosion-Proof & High-Temperature Integrated Air Velocity Air Volume Transmitter LFS73
Measurement Medium	Air or neutral gas
Range	Air velocity : 0~30m/s (range can be adjusted between 5 ~ 30m/s) 0~100m/s (range can be adjusted between 35 ~100m/s) Air volume : customized air volume(Max.99999m3/h)
Overload Pressure	10KPa(0-30m/s); 80KPa(0~100m/s)
Accuracy①	± 3.0%FS (Air velocity > 3m/s)
Working Temperature	Main Unit : -20℃~70℃; probe : -40℃~450℃
Compensation Temperature	-10℃~60℃
Storage Temperature	Main Unit : -40℃~80℃
Response Time	0.5s / 1.0s (default) / 2s / 4s
Ingress Protection	IP65
Electrical Interface	Six-core wire, cable diameter of 8mm
Output Signal	4~20mA & 0~10VDC & RS485
Power Supply➁	12~30VDC / 24VAC ±20%
Power Consumption	≤1.5W
Shell Material	Cast aluminium
Communication	RS-485 standard Interface, Modbus RTU protocol
Certification Project	ROHS, CE
Explosion-proof Grade	Ex db lIC T6 Gb
Display	LCD backlit digital display

① Environmental conditions: temperature: 20℃,humidity: 45% RH, atmospheric pressure: 1035 hPa.

➁ When the product uses the AC power supply, it is recommended to use the isolated AC power supply.

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Wire Function	Color	Wire Instructions	Remarks
V+	Red	Positive terminal
V-	Black	Negative terminal
485A	Green	485 Communication interface	For different output, Only reserve needed wires.
485B	White	485 Communication interface
Vout	Brown	0-10VDC voltage output port, connect to Power+ of the multimeter, and the other end of the multimeter connect to V-
Iout	Yellow	4-20mA current output port, connect to Power+ of the multimeter and the other end of the multimeter connect to V-.

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① For T30/T45 products, the probe is equipped with a heat sink by default, and the length of the heat sink is about 10cm., Cold end length refers to the length from the product host to the installation pipeline.