LEFOO LFH20 Indoor Temperature and Humidity Transmitter: Top Choice in Malaysia, Selangor, KL Excel Test Sdn Bhd

Description

DESCRIPTION

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

TECHNICAL DATA

RELATIVE HUMIDITY
Sensor	Digital
Measuring Range	0%~100%RH
Output	RS485/Modbus, 0~10VDC, 4~20mA optional
Response Time	≤10s(25℃, slow flow air)
Accuracy	±3%@ 20℃ & 20~80%RH
TEMPERATURE
Sensor	Digital or RTD
Measuring Range	0~50℃, -20~60℃, etc
Output	4~20mA, 0~10VDC, RS485/Modbus
Work Temperature	-20~60℃, 5%-95%RH(non-condensing)
RTD (Thermal resistor)	Refer Selection Guide
Output Load	≤500Ω(current type) ≥2KΩ(voltage type)
Accuracy	Digital sensor: ±0.3℃@20℃ RTD: Typical ±0.2~0.4℃@25℃, refer to selection table
Display	Optional LCD display with unit display and backlight (4~20mA without backlight)
Power Supply	Voltage type/485 type 15~35VDC/24VAC±20% Current type 19.5~35VDC (RL=500Ω)/9.5~35VDC (RL=0Ω)
Shell Material	PC
Protection Grade	IP30

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 display	Display
					1	LCD digital display
LFH20	3	A4	A4	1	1		Selection example

DIMENSIONS

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