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Digital Differential Pressure Gauge LFM30

LFM3 Series differential pressure gauge use imported high precision sensor and digitalization technology. They are easy installation, LCD display, clear and accurate reading, and can be applied to measure fan and blower pressures, filter resistance, air velocity, furnace draft, pressure drop across orifice plates, and medical care equipment. This series has three optional discrete output versions  (relay, NPN, and PNP), which can be flexibly applied to control the external types of equipment. LFM30 is the digital differential pressure transmitter with Relay.


* Embedded installation

* One relay output for control

* Built-in buzzing sound and light alarm

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Specification of Digital Differential Pressure Gauge LFM30

Measurement Range0~±100Pa, 0~±1,000Pa, 0~±10,000Pa
Measured MediumAir and neutral gas
Storage Temperature-20℃~70℃
Protection GradeIP54
Output SignalNPN OutputPNP OutputRelay OutputNo Output
Power Supply12~30VDC/ Built-in 9V Battery(6F22 Battery)(Only suitable for the series
of no output )
Pressure ConnectionPlastic concave interface
Housing MaterialABS industrial plastics (UL94-V0)
CertificationROHS, EU CE
Electromagnetic transmit: EN50081-1/-2; electromagnetic sensitivity: EN50082-2
Lightning protectionAir conduction withstand voltage 8000V, shell and cable conduction withstand
voltage 4000V ( customized)
Display mode80*40mm LCD display
Weight328g(include battery)

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Description of Digital Differential Pressure Gauge LFM30

  • Various switchable pressure units.

  • Non-polar Input: No need to differentiate the negative or positive input voltage sourcing lead.

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

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

  • The Max.and Min.pressure range of discrete output can be set.

Application of Differential Pressure Gauge

Pressure measurement of Air and chemical gently gas media.

Hospital construction

The catalytic combustion purification system

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