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Specification of Residual Pressure Transducer LFM208


Measurementrange 0~±100Pa
Accuracy (a)±1%F.S
Working temperature(-20℃~75℃
Compensated temperature(-5℃~60℃
Protection GradeIP30
Power Supply24VDC±2.4V
Consumption≤0.75W
Trachea connection(+)High voltage side,(-)Low pressure side; adopt 3.5mm inner diameter hose
InstructionsGreen status, red alarm indicator
Display methodWith display/without display
Measured mediumAir and non-corrosive gas
Control signal(b)switching value
Communication modeTwo bus (two-wire system)/RS-485 (four-wire system)
Withstand voltage1000Pa

a) Accuracy is obtained by testing at room temperature 25℃; b) Connecting resistive load (optional)


How to Select


Code and description


Notes

LFM208


Model


2530

20~30pa

Measurement range


4050

40~50pa


N

without display

Screen display


D

display




R

R=RS485

Communication mode




P

P=Pb Two -bus

LFM208

2530

D

R

Model selection example


Note: For example, when LFM208-4050-DR is selected, the operating pressure of the residual pressure transmitter is 50Pa. The reset pressure is 40Pa. With screen display, RS485 communication output.


Function Description

The residual pressure transmitter panel has two indicators: a green status indicator and a pressure alarm indicator;

1. Status indicator: Under normal working condition, the green indicator light is on; under the equipment failure condition, the green indicator light flashes;

2. Alarm indicator: During pressure measurement, when the air pressure is lower than the reset pressure, the alarm light is always on. If the air pressure is higher than the operating pressure. The alarm light flashes. When the pressure is between the reset pressure and the operating pressure, the alarm light is off;

If the product has a pressure display window, the pressure value can be directly displayed;


LEFOO Function Description LFM208