Lefoo 2000 - 2025
Lefoo 2000 - 2025
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LFH30
Temperature and Humidity Transmitter with Display

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LFH30 senstive components use imported polymer film humidity sensitive capacitors and PT1000 temperature sensitive resistors. The special breathable coating and SMD injection molding process can ensure the long stability of the probe in the environment of dust, salt spray pollution and high humidity condensation. It is calibrated with mature humidity and temperature measurement technology to ensure the accuracy. It is suitable for high-standard intelligent buildings, incubators, industrial dehumidifiers and other fields.

  • Humidity accuracy up to ±2%RH.

  • Imported humidity sensitive capacitor, can resist condensation and pollution.

  • Passive temperature output optional.

  • Stainless steel probe, sintered/stainless steel wire mesh filter optional.

  • CE certification, IP65, ROHS.

SPECIFICATION
Dimension

SPECIFICATION

1) Relative humidity

Sensor

Humidity Sensitive Capacitor

Measurement range

0%~100%RH

Output

RS485/Modbus, 0~10VDC, 4~20mA

Accuracy

±2%@20℃ & 20~80%RH

Response time

≤10s(20℃, slow air flow)



2) Temperature

Sensor

Pt1000 or passive thermal resistance, see Order Ref No.

Measurement range

0~50℃, -20~60℃ etc

Output

4~20mA, 0~10VDC, RS485/Modbus Optional

Thermal resistance

See Order Ref No.and Thermal Resistance Indexing Table

Accuracy

Digital sensor: 0.3℃ @5~60℃; Thermal resistance type: typical: ±0.2~0.4℃@25℃, see Order Ref No.

Power supply

RS485 type 9~35VDC/24VAC±20%

Voltage type: 12~35VDC/24VDC±20%

Current type: 19.5~35VDC(RL=500Ω)/9.5~35VDc(RL=0Ω)

Output load

≤500Ω(Current type), ≥2KΩ(Voltage type)

Display

LCD display optional, with unit display and backlight (4~20mA without backlight)

Shellmaterial

PC housing, PC probe and polymerfiter (optional stainless steel probe rod, sintered/stainless steel wire mesh fiter)

Working environment

-20~60℃, 5%-95%RH(Non-condensing)

Protection level

IP65

Electromagnetic compatibility

EN61326-1


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