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Pressure Switches LF20 Series

Lefoo pressure switch LF20 series is factory set but capable of adjustable high pressure and low pressure settings.It features different diaphragms that meet various of fluid medias.  Common Pressure range 0.5~24 PSI, and 25~150 PSI.

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Specification of Pressure Switch LF20


ModelLF20
MediumAir,water,motor oils, transmission oils,jet fuel,other hydrocarbon media.
Factory  Setting  Pressure0.5~150 psi
Maxium pressure150psi  or  250psi
Tollorant Pressure500 psi
Bust Pressure750 psi or 1250 psi
Temperature Range -40 ℃ ~120℃ 
Switch typeBlade contact direct actions
Resistive Electric Rating15Amp-6vDC,   8Amp-12vDC, 4Amp-24vDC
Inductive Electric Rating1Amp-120vDC,   0.5Amp-240vDC
Contact Arrangement(B)BSPST-NC, SPST-NO,SPDT-NO-C-NC,SPST-NO (adjustable),SPDT-NO-C-NC (adjustable)
Terminal#8-32 screws,1/4" blade
Connection1/8 -27NPT Male,1/4 NPT,R1/8,R1/4,G1/8,G1/4
MaterialSilver alloy,gold plated,brass base,  glass reinforced polymer cover,polymide diaphragm piece
OptionsPlate steel, plastic base, 304/306 steel base, optional conector thread size
wire leads(potted& sealed); Teflone / EPDM diaphragm
Unit Conversion1kgf/cm² =14.2 psi,  1bar=14.5psi


How to Select


Pressure Set RangeCircuitryBasic MaterialConnectionTerminalsCover
Factory  Setting 10 PSI(B)BSPST-NC

SPST-NO

SPDT-NO-C-NC

SPST-NO
(adjustable)

SPDT-NO-C-NC
(adjustable)
(C)Brass

Plated steel
(D)1/8 NPT

1/4 NPT

R1/8

R1/4

G1/8

G1/4

(E)1/4 blade

#8-32 screws

wire leads
None

(F)Cover A

Cover B

Eco-Resin
0.5-1psi±0.3psi
1.1-3psi±0.5psi
3.1-7psi±0.1psi
(A)8psi~13psi±2psi
14-24psi±3psi
25~50psi±5psi
51-90psi±7psi
91-150psi±10psi



 Example  ABCDEF  LF20/8psi~13psi±2psi/BSPST NC/Brass/1/8 NPT/1/4 blade/Cover A

Features of LEFOO Pressure Switch

Durable construction, compact size, and enhanced set point integrity.


Capable for a variety of fluids, and various terminations such as Metri-Pack connector.


capable for High-pressure Industries 100,000 to 200,000 times of using span


Application of LEFOO Pressure Switch

Available for the application of pool, spa, anti-skid braking system,water pump system,dental equipment,,air compressors,off road equipment, other pressure control systems.

Also available for high pressure industries.


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