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

Built-in high-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
Allows quick on-site zero adjustment after installation
Saves commissioning time and simplifies maintenance

Long-Term Stability & Reliability

Typical long-term stability of ±0.25% FS per year
Designed for continuous operation 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
Metal barbed pressure ports provide secure and leak-free connections
Clear wiring options for fast deployment

Technical Specifications

Measured Medium	Air or neutral gas
Pressure 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:

Analog Output Options

4–20mA – industry-standard current output with strong anti-interference capability
0–10V
0–5V

Digital Communication

RS485 interface
Supports Modbus RTU protocol
Supports BACnet MS/TP protocol

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:

HVAC Systems

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 workshops

Building Automation & Energy Management

Building energy management systems (BEMS)
Static pressure control in ventilation systems

Environmental & Industrial Control

Airflow measurement and control
Environmental pollution and exhaust monitoring

Brochure-for-LFM108-Differentia…

Model Selection & Ordering Information

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

Measuring Ranges (Examples)

±100Pa / ±250Pa / ±500Pa / ±1000Pa
±2500Pa / ±5000Pa / ±10000Pa

Output 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:
LFM108-101G-MVL-M

Brochure-for-LFM108-Differentia…

Why Choose the LFM108 Differential Pressure Transmitter?

Reliable and accurate MEMS-based pressure measurement
Multiple outputs and communication protocols for flexible integration
Easy installation 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 building automation systems. 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.