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LFM11 Series Differential Pressure Transmitter
Product Details

Feature

Low Differential Pressure Transmitter LFM110/LFM112 are engineered for building automation in the HVAC/R industry , pressure and flow monitoring, and low differential pressure test in industry application.

Differential pressure range can be set on request.

Input voltage:16~30Vac/Vdc

Output signal:0~10V and 4~20mA(2 wire output,can be used at the same time)

LCD backlight digital display.

Auto zero calibration when switch on.

Manual zero calibration.

ABS industrial plastic cover,IP65protection

Rotation is fixed on the backboard.


Specification

Range

LFM110 -1000~+1000Pa Minimum 0~+100Pa

LFM112 -10,000~+10,000Pa Minimum 0~+1000Pa

LFM116 -100~+100Pa Minimum 0~+10Pa

LFM111 -3400~+3400Pa Minimum 0~+100Pa

Accuracy

±1.0%FS

Pressure unit

Pa, mmH2O, mbar, inWG, mmHG, daPa, KPa, hPa

Output signal

0~5VDC、0~10VDC、4~20mA、RS-485

Analog signal: current type 2-wire , voltage type 3-wire, current and voltage type 6-wire; Digital signal: RS-485 4-wire

Supply voltage

2-wire output:supply voltage is 16~30VAC/VDC,can be collocated with 24VDC adaptor(3.5x1.35mm) Current type 2-wire output:supply voltage is non-polarized 12~30VDC.(The positive pole and negative pole of voltage can be conneected in a contrary way)

Voltage type 3-wire output:supply voltage is 16~30 VAC/VDC.

RS-485 4-wire output: supply voltage is 12~30 VAC/VDC

Power consumption

≤1.5W

① non-polarized:Theinput power is not divided into positive or negative


Mechanical Specification

Material:industrial plastic, flame retarded rating: UL94-V0

Protection Grade:IP65

Display:LCD display,50 x 22.5 mm

Number Height:test value at 10 mm , unit at 5 mm

Pressure Connection:metal barb connection, Ø 6.2 mm

Cable Connection:max diameter: Ø 8 mm

Weight:140g


Transmitter Function

Response Time

0.5s,1s,2s,4s

Resolution

LFM110

LFM112

1Pa,0.1mmH2O,0.01mbar,0.004inWG,

0.007mmHG,0.1dapa,0.001KPa,0.01hPa

LFM116

0.1Pa,0.01mmH2O,0.01mbar,0.01dapa,0.001hPa

LFM111

1Pa,0.1mmH2O,0.01mbar,0.004inWG,

Zero Calibration

Manual with push button or automatic at starting for zero calibration

Media

Air and neutral gases

Tolerated Overpressure

15KPa(LFM110);150KPa(LFM112);4.5KPa(LFM116);60KPa(LFM111)

Operating Temperature

-10~+60℃

Storage Temperature

-10~+70℃

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