LFM33 Differential Pressure Transmitter/Controller

PRODUCT FEATURES

High-precision MEMS digital pressure sensor,to detect positivepressure,negative pressure,or differential pressure;
Combined function of LCD digital display,switch control andtransmitter output;Adjustable pressure range,and switchable pressure units;
Adjustable pressure range,and switchable pressure units;
Support relay working mode,control or alarm output optional,with LED indication;
Built-in buzzer with sound-light alarm,support alarm pressuresetting on site;
RS-485 communication,standard ModBus RTU protocol;
FR-ABS housing,good impact resistance and heat resistance etc.

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Specification

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Description

LFM33 Differential Pressure Transmitter/Controller adopts high-precision MEMS digital pressure sensor,which candetect positive pressure,negative pressure or differential pressure.It can choose analog signal 4~20mA&0~10V orRS485 signal output.It has optional relay switch control and can independently set the relay switch action pressurepoint.It supports a variety of working mode settings to match the actual application requirements.The internal buzzerand LED indication can achieve pressure alarm and indication.Pressure unit switching and digital damping filterdegree can be set on site.It’s widely used in air or neutral gas detection and control,and suitable for gas pressuredetection of various ventilation and air conditioning systems and equipment,and differential pressure detection offilter resistance in clean studios laboratories,and gas pipelines.

Specification

Measured Medium	Air or non-corrosive gases
Measurement range	±100Pa,±1000Pa,+10000Pa
Overload pressure	5kPa(LFM336);10kPa(LFM330);80kPa(LFM332)
Accuracy	±1%F.S
Operation Temperature	-10℃~60℃
Compensated Temperature	-10℃~60℃
Storage Temperature	-20℃~70℃
Protection Grade	IP65
Pressure Connection	Plastic Concave Interface,06.5mm
Output Signal	4~20mA&0~10V	RS485
Control Signal	2SPDT relays 3A@250VAC/30VDC
Power Supply	16~30VDC
Consumption	≤2.5W
Housing Material	ABS Industrial plastic(UL94-V0)
Communication	RS-485 standard interface,Modbus RTU protocol
Certification	ROHS,CE
Electromagnetic Compatibility	EN61326-1
Display	76*33mm LCD display
Weight	360g

Product Selection

Code name and description

Remarks

LFM33

Model number

-100~100Pa

Range range

-1000~1000Pa

-10000~10000Pa

N/A

Signal
outputtype

RS-485 communication

4~20mA&0~10V

N/A

Control
output

2 SPDT Relays +1xBuzzer

1xBuzzer

2 SPDT Relays

Plastic panel (round)

Mounting
panel

Stainless steel panel (square)

Front panel air intake

Air intake
method

Back air intake

Side air intake

LFM33 0 – A R P F

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