LFH20 Indoor Temperature and Humidity Transmitter

LFH20 Room Temperature and Humidity Transmitter

FEATURES

• Comply with standard 86-type switchbox installation method
• The shell desian is light and beautiful, with LCD backlight temperature and humidity dual display, easy to use
• Adopt imported high-precision sensor and main control, with good long-term stability and anti-interference ability
• Optional passive temperature output
• CE certified, RoSH

DESCRIPTION of LFH20 Digital Temperature and Humidity Sensor

LFH20 Smart Temperature and Humidity Transducer is specially designed for indoor temperature and humidity detection. it is small in size, simple in installation and easy to operate. lt has special design for lightning surge, static electricity group pulse, withstand voltage, etc., and has strong anti-interference ability. There are three output modes of current voltage and RS485 to choose from. lt can be widely used in computer rooms, buildings, warehouses and other places where temperature and humidity are to be measured.

Our LFH20 Temperature and humidity monitor can be applied in various fields including commercial buildings, industrial facilities, cleanrooms, data centers, healthcare, food and beverage, museums and archives, HVAC systems, greenhouse agriculture, and residential settings.

PARAMETERS of LFH20 Industrial temperature and humidity meter

• Relative humidity

Transducer	Digital
Rang	0%~100%
Output	RS485/Modbus, 0~10VDC, 4-20mA optional
Accuracy	±3%@20°C&20-80%RH
Response Time	≤10s(20°C, slow flow air)

• Temperature

Transducer	Digital or thermal resistance, see Order Ref No.
Range	0~50°C, -20~60°C etc.
Output	4~20mA, 0~10VDC, RS485/Modbus optional.
Thermal Resistance	See Order Ref No. and Thermal Resistance Index Table
Accuracy	Digital type: ±0.3°C@20°C; Thermal resistance type: typical ±0.2~0.4°C@25°C, see Order Ref No.
Power Supply	Voltage type/485 type: 15~35VDC/24VAC+20%(isolated power supply is required for AC power supply) Current type:19.5~35VDC(RL=500Ω)/9.5~35VDC(RL=0Ω)
Output Load	≤500Ω(Current type), ≥2KΩ(Voltage)
Display	LCD display optional, with unit display and backlight
Shell Material	PC housing
Work Environment	-20~60°C, 5%-95%RH(Non-condensing)
Protection Grade	IP30
Electromagnetic Compatibility	EN61326-1

NOTE: 

1. Only when the temperature output option is V10 or A4, the corresponding temperature range 1-8 should be selected
otherwise.only 0 can be selected.
2. The product sensor probe is prolonged exposure to high concentrations of chemical gases may cause the sensol
readings to shift.
3. Example 1: LFH20-3A4A411 represents indoor type, temperature and humidity accuracy is +3%RH (+0.3?), humidity
    output 4~20mA, temperature output 4~20mA, temperature range 0~50?, with display.
    Example 2: LFH20-3NRS01 represents indoor type, temperature accuracy is ±0.3?, no humidity output, temperature
    output RS485,no temperature range, with display.
    Example 3: LFH20-3A4N01 represents indoor type, humidity accuracy ±3%RH, humidity output
    4~20mA,no temperature output, no temperature range, with display.