Excel Test Sdn Bhd
Sales & Admin Department
Unit C3A10, 3Ath Floor,
Block C, Kelana Square,
17, Jalan SS 7/26,
47301 Petaling Jaya,
Selangor, Malaysia.
Calibration Laboratory
Unit C717, 7th Floor,
Block C, Kelana Square,
17, Jalan SS 7/26,
47301 Petaling Jaya,
Selangor, Malaysia.
LEFOO LFH20 Indoor Temperature and Humidity Transmitter
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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 |
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| 3 | ±3%RH(±0.3℃) |
Accuracy |
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| A4 | 4~20mA(Two-wired) |
Humidity output |
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| V10 | 0~10VDC(Three-wired) | |||||||
| RS | RS485/Modbus | |||||||
| N | No output | |||||||
|
A4 |
4~20mA(Two-wired) |
Temperature Output |
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| 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℃ |
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| 2 |
-20~60 |
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| 8 |
Customizable |
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| 0 |
Without display |
Display | ||||||
| 1 |
LCD digital display |
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|
LFH20 |
3 | A4 | A4 | 1 | 1 |
Selection example |
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DIMENSIONS
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