Details

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DESCRIPTION

LFH21 series temperature and humidity controller is a product designed for indoor temperature and humidity detection and control.

It has the advantages of small size, simple installation and convenient operation.

It has special design for lightning surge, electrostatic discharge, group pulse, voltage resistance, etc., strong anti-interference ability, and alarm function.

It can be widely used in places such as computer rooms, buildings, warehouses, etc. where temperature and humidity measurement and control are required.

FEATURES

• Standard switch box installation method for easy use.
• Light and beautiful shell design, with LCD backlight to display dual temperature and humidity.
• Using imported high-precision sensors with good long-term stability and anti-interference ability.
• Optional passive temperature output.
• Temperature and humidity offset can be set to facilitate customer on-site operation.
• CE certification, ROSH
• With relay and alarm function

TECHNICAL DATA

RELATIVE HUMIDITY
Sensor	Digital
Measuring Range	0%~100%RH
Output	RS485/Modbus,0~10VDC
Response Time	≤10s (20℃, slow flow air)
Accuracy	±3%@ 20℃ & 20~80%RH
TEMPERATURE
Sensor	Digital or passive thermal resistor, details refer to selection table
Measuring Range	0~50℃, -20~60℃, etc
Output	RS485/Modbus,0-10VDC
Work Temperature	-20~60℃, 5%-95%RH (Non-condensing)
Thermal Resistance	Refer Selection Guide
Output Load	≥10kΩ(voltage output)
Accuracy	Digital sensor: ±0.3℃@20℃, See table below ; Passive thermal resistance: typical ±0.2~0.4℃@25℃, refer to selection table
Display	LCD display and keys with unit display and backlight
Display Accuracy	0.1℃,0.1%RH
Alarm Function	1xBUZZER,1xLED
Power Supply	RS485:15-35VDC/24VAC±20% Voltage:15-35VDC/24VAC±20%
Shell Material	PC
Protection Grade	IP30

 

DIGITAL SENSOR TEMPERATURE ACCURACY CURVE

DIMENSIONS

SELECTION TABLE