Indoor Temperature Humidity Sensor LFH20

Name: Indoor Temperature Humidity Sensor LFH20
Brand: LEFOO INDUSTRIAL CO.,LTD.

LEFOO LFH20 temperature and humidity transmitter is a transmitter specially designed for indoor temperature and humidity detection, with small size, simple installation and easy operation. It has special design for lightning surge, electrostatic discharge, group pulse, withstand voltage, etc., and has strong anti-interference ability. There are three output modes of current, voltage and RS485 to choose from. It can be widely used in computer rooms, buildings, warehouses and other places that need to measure temperature and humidity.

Features

* Comply with the standard 86 box installation method

* The shell design is light and beautiful, with LCD backlight temperature and humidity dual display, easy to use

* Adopt imported high-precision sensors and main control, with good long-term stability and anti-interference ability

* Optional passive temperature output

* CE, RoSH certification

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Transmitter

Pump

Specification
Features
Applications

Specification of Indoor Temperature and Humidity Sensor LFH20

Technical parameter

LEFOO Indoor Temperature and Humidity Sensor LFH20
Relative Humidity
Sensor	Digital type
Range	0%~100%RH
Output	RS485/Modbus,0~10VDC, 4~20mA optional
Accuracy	±3%@ 20℃ & 20~80%RH
Response time	≤10s(25℃, slow flow air)
Temperature
Sensor	Digital or RTD, refer to selection table
Range	0~50℃, -20~60℃, etc
Output Signal	4~20mA,0~10VDC, RS485/Modbus optional
RTD(thermal resistor)	Refer to the selection table and RTD indexing table
Accuracy	Digital sensor: ±0.3℃@20℃ ; RTD: Typical ±0.2~0.4℃@25℃, refer to selection table
Power Supply	Voltage type/485 type 15~35VDC/24VAC±20% ; Current type 19.5~35VDC (RL=500Ω)/9.5~35VDC (RL=0Ω)
Output Load	≤500Ω(current type), ≥2KΩ(voltage type)
Display	Optional LCD display with unit display and backlight (4~20mA without backlight)
Shell Material	PC
Working Environment	-20~60℃, 5%-95%RH(non-condensing)
Protection Class	IP30

Dimension

Selection Guide

Code and Description							Remark
LFH20	Indoor Temperature Humidity Sensor						Model
	3	±3%RH(±0.3℃)					Accuracy
		A4	4~20mA(Two-wired)				Humidity output
		V10	0~10VDC(Three-wired)
		RS	RS485/Modbus
		N	No output
			A4	4~20mA(Two-wired)			Temperature output
			V10	0~10VDC(Three-wired)
			RS	RS485/Modbus
			0	PT1000，±0.2℃@0℃
			1	PT100，±0.2℃@0℃
			2	NTC20K，±0.4℃@25℃
			3	NTC10K,±0.4℃@25℃
			N	No output
				0	Non		Range
				1	0~50℃
				2	-20~60
				8	Customizable
					0	Without displa	Display
					1	LCD digital display

LFH20	3	A4	A4	1	1		Selection example

Features of Indoor Temperature and Humidity Sensor LFH20

Comply with the standard 86 box installation method
The shell design is light and beautiful, with LCD backlight temperature and humidity dual display, easy to use
Adopt imported high-precision sensors and main control, with good long-term stability and anti-interference ability
Optional passive temperature output
CE, RoSH certification

Applications of Indoor Temperature and Humidity Sensor LFH20

LFH20 can be widely used in computer rooms, HVAC, buildings, warehouses and other places where temperature and humidity measurement and control are required.

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