LFM108 Differential Pressure Transmitter

High-Accuracy MEMS Differential Pressure Sensor for HVAC & Building Automation

Product Overview

The LFM108 Differential Pressure Transmitter is a high-performance industrial pressure measurement device developed by LEFOO Instruments. It is designed to accurately measure differential pressure or gauge pressure of air and neutral gases, and convert the measured pressure into standard analog or digital output signals such as 4–20mA, 0–10V, 0–5V, or RS485.

By integrating a high-precision MEMS pressure sensor, wide temperature compensation, and strong long-term stability, the LFM108 is especially suitable for HVAC systems, building energy management systems (BEMS), cleanrooms, air flow monitoring, and environmental control applications. Its compact structure, easy installation, and multiple communication options make it an ideal choice for system integrators and OEM customers. Brochure-for-LFM108-Differentia…

Key Features

High-Precision MEMS Sensor Technology

>Key FeaturesHigh-Precision MEMS Sensor Technologyhigh-accuracy MEMS differential pressure sensor

Excellent sensitivity to small pressure changes

Wide temperature compensation ensures reliable performance under varying environmental conditions

One-Button Zero Calibration

• Equipped with a zero calibration button
• A>One-Button Zero Calibrationnt after installation
• Saves commissioning time and simplifies maintenance

Long-Term Stability & Reliability

• Typical long-term stability of ±0.25% FS per yearLong-Term Stability & Reliabilityoperation in industrial and commercial environments
• Strong resistance to pressure overload and environmental interference

Compact & Easy Installation

• Compact housing suitable for wall mounting or cabinet installation<>Compact & Easy Installationts provide secure and leak-free connections
• Clear wiring options for fast deployment

Technical Specifications

Measured Medium	Air or neut>Technical Specificationsure Range	±100Pa to ±1000Pa, up to ±10000Pa
Overload Pressure	Maximum 15 times rated pressure
Accuracy	±1% F.S
Stability	Typical ±0.25% F.S / year
Operating Temperature	-20°C to +70°C
Temperature Compensation Range	-10°C to +60°C
Response Time	0.5s / 1.0s / 2.5s / 4s
Protection Grade	IP54
Electrical Connection	2-wire / 3-wire / 4-wire / 5-wire
Output Signal	4–20mA, 0–10V, 0–5V, RS485
Power Supply	10–30VDC / 12–30VDC / 16–30VDC
Power Consumption	≤1.5W
Communication	RS485 (Modbus RTU / BACnet MS/TP)
EMC Standard	EN61326-1
Certification	CE, RoHS
Housing Material	UL94-V0 flame-retardant ABS
Pressure Port	Metal barbed port, Ø6.2 mm
Cable Gland	Max cable diameter Ø8 mm

(All specifications are based on the LFM108 official brochure.) Brochure-for-LFM108-Differentia…

Output & Communication Options

The LFM108 offers flexible output configurations to meet different control system requirements:

Output & Communication Options

Analog Output Options

• 4–20mA – industry-standard current output with strong anti-interference capability
>Analog Output Optionsng>
• 0–5V

Digital Communication

• RS485 interface
• Supports Modbus RTU protocol
• Support>Digital Communicationocol

These options allow seamless integration with PLC, DDC, and Building Management Systems (BMS) for centralized monitoring and control. Brochure-for-LFM108-Differentia…

Typical Applications

The LFM108 differential pressure transmitter is widely used in the following applications:

Typical Applications

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Air duct differential pressure monitoring

Filter clogging detection

Fan and air handling unit (AHU) control

Cleanrooms & Laboratories

• Positive and negative room pressure control
• Hospital operating rooms and pharmaceutical work>Cleanrooms & Laboratorieslock-heading" id="building-automation-energy-management">Building Automation & Energy Management
  • Building energy management systems (BEMS)
  • Static pressure control in ventilati>Building Automation & Energy Managementing" id="environmental-industrial-control">Environmental & Industrial Control
    • Airflow measurement and control
    • Environmental pollution and exhaust monitoring
    >Environmental & Industrial Control…

    Model Selection & Ordering Information

    The LFM108 series provides multiple measuring ranges, output signals, and protocol options to suit various projects:

    >Model Selection & Ordering Informationnges-examples">Measuring Ranges (Examples)
    • ±100Pa / ±250Pa / ±500Pa / ±1000Pa
    • ±2500Pa / ±5000Pa / ±10000Pa

    Measuring Ranges (Examples)

    ut Types
    • AL: 4–20mA
    • VL: 0–10V
    • VZ: 0–5V
    • MOD: RS485
    • MVL / MVZ: RS485 + voltage output

    Communication Protocol

    • M: Modbus RTU
    • B: BACnet MS/TP

    Model Example:Communication Protocol/strong>

    Brochure-for-LFM108-Differentia…

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    Why Choose the LFM108 Differential Pressure Transmitter?

    • Reliable and accurate MEMS-based pressure measurement
    • Multiple outputs and communi>Why Choose the LFM108 Differential Pressure Transmitter?tallation and maintenance, reducing project costs
    • Ideal for HVAC, building automation, and industrial air pressure applications

    Conclusion

    The LFM108 Differential Pressure Transmitter is a robust, precise, and versatile solution for differential pressure measurement in modern HVAC and buil>Conclusionsystems. With its high accuracy, long-term stability, and flexible communication options, it delivers dependable performance for both new installations and retrofit projects.

    If you are looking for a cost-effective yet professional differential pressure transmitter, the LFM108 is a proven and trusted choice.