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LFH20 Temperature and Humidity Transmitter is specially designed for indoor temperature and humidity detection. It is small in size, simple in installation and easy to operate. It 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. It can be widely used in computer rooms, buildings, warehouses and other places where temperature and humidity are to be measured.
Comply with standard 86-type switchbox installation method.
The shell design 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.
1) Relative humidity
Transducer | Digital |
Rang | 0%~100% |
Output | RS485/Modbus, 0~10VDC, 4~20mA optional |
Accuracy | ±3%@20℃&20~80%RH |
Response Time | ≤10s(20℃, slow flow air) |
2) Temperature
Transducer | Digital or thermal resistance, see Order Ref No. | |
Range | 0~50℃, -20~60℃ 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℃@20℃; Thermal resistance type: typical ±0.2~0.4℃@25℃, 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) |
Outout Load | ≤500Ω(Current type), ≥2KΩ(Voltage) | |
Display | LCD display optional, with unit display and backlight | |
ShellMaterial | PC housing | |
Work Environment | -20~60℃, 5%-95%RH(Non-condensing) | |
Protection Grade | IP30 | |
Electromagnetic Compatibility | EN61326-1 | |
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