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Digital Differential Pressure Gauge LFM31

The LFM31 series is a highly integrated, multi-functional digital, smart transmitter. Adopt mature and reliable sensor technology. Combined with advanced micro-controller technology and sensor digital conversion technology designed. LCD display, clear and accurate readings. The core controller adopts an imported single-chip microcomputer, its powerful function, and high-speed computing ability ensure the excellent quality of the transmitter. It can be equipped with an on-site segment LCD display. RS-485  network communication can read the current pressure value of the target device in real-time. Meanwhile, the LFM31 series has 0~5VDC, 0~10VDC, or 4~20mA output modes (individual voltage or current three-wire output, voltage and current Three-wire output at the same time), Mainly used in the intelligent building energy management system, to measure the precise pressure and flow required for building pressurization and airflow control.



Features 


* Embedded installation

* Capable Two Analog output signals 

* Built-in buzzing sound and light alarm


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Specification of Digital Differential Pressure Gauge LFM31

Measurement range0~±100Pa, 0~±1,000Pa, 0~±10,000Pa
UnitPa、 KPa、mBar、mmHG、inWC、mmWC,
Accuracy±1%F.S
Working Temperature-20℃~70℃
Protection GradeIP54
Output Signal0~5V0~10V4~20mARS485
Power supply12~30VDC
Consumption≤0.75W
Pressure connectionPlastic concave interface
Housing materialUL94-V0/ABS Industrial plastics
CertificationROHS,CE
Electromagnetic compatibilityElectromagnetic radiation: EN50081-1/-2; electromagnetic sensitivity:
EN50082-2
Lightning protectionAir conduction withstand voltage 8000V, shell and cable conduction withstand
voltage 4000V (customized)
Display80*40mm LCD display
Weight315g


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How to Select

 

 Code and description

 

Notes

LFM31

Digital Differential Pressure Transmitter

Mode


6

-100100pa

Measurement range


0

-1000~1000Pa


2

-10000~10000Pa


A

4~20mA and 0~5V/0~10VSimultaneous output

E

RS—485

Output mode


B

4~20mAThree-wire

F

0~10V and RS—485


C

0~10VThree-wire

G

0~5V and RS—485


D

0~5VThree-wire

H

4~20mA and RS—485




P

Plastic panel (round)

Installation panel




S

Stainless steel panel (square)




F

Front panel air intake

Air intake method




B

Rear panel air intake


LFM31               

0

B

 P

B

Model selection example


Description of Digital Differential Pressure Gauge LFM31

  • Manual button Zero calibration and full-scale adjustment

  • RS-485 serial communication, support standard ModBus RTU protocol

  • Built-in buzzer with sound-light alarm, field programmable alarm pressure value.

  • Housing made of FR-ABS, satisfactory impact resistance and heat resistance, etc.

Application Digital Pressure Gauge

Pressure Monitoring for Air and chemical gently gas medium.

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