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Differential Pressure Switch LF32

 The air differential pressure switch (sensor) is used to measure the air differential pressure in ventilation systems. For example, to monitor filter clogging or fan motor belt integrity. Includes mounting kit with the soft tube. It can be used to control the clogging of filters in the air purification sections, as well as to control the operation of the motor of the fan section.


Features of the LF32 air pressure switch


Long life: Designed for 0.1 million switching cycles.

Can be used in cleanrooms.

Possesses high precision of setting and regulation.

Long-term stability of the switch-off setpoints.

Ease of installation


The LF32 is an adjustable differential pressure switch capable of detecting minuscule changes in pressure due to its size and proven design. The switch setpoint or switching point can be field adjustable without the need for a manometer by simply using the adjustment knob and the built-in calibrated visual scale. This switch is equipped with a clear cover that not only protects the adjustment knob to be moved involuntary but also provides class IP54 protection.

The LF32 Air Sensing Switch is primarily used in heating and ventilation applications where the need to accurately monitor airflow in air duct systems, air filters, flaps is critical.

Some specific applications of the LF32 Air Handling Unit Pressure Switch are :

Controlling fire protection flaps in ventilation ducts

Monitoring air filters in cooling and heating systems

Monitoring cooling systems of industrial electronic circuits,

Monitoring positive pressure on pressurized rooms

Monitoring airflow on fan heaters (overheating protection)

Frost protection for heat exchanger

The LF32 Adjustable differential pressure switch can also be used as an adjustable pressure switch and adjustable vacuum switch as well.




Technical Data of Differential Pressure Switch LF32


ModelLF32
LEFOO Technical Data of Differential Pressure Switch LF32
MediaAir, noncombustive and non-aggressive gas
Max Pressure10kpa
MountingThe diaphragm in any vertical plane
liquid Preventing LevelIP54
Operating Temperature-40 ℃ ~85℃
Contact ArrangeSPDT
Electrical RatingResistance:initaial <100 Milliohm,  Current:1.5A(0.4A)/250V
Terminal6.3mm  x 0.8 blade or screw terminal
Connectionɸ 6.4mm for tube connection


ModelPressure Range (Pa)Differential (Pa)Tolerances
LF32-0220-20010≦±15%
LF32-0330-30010
LF32-0440-40020
LF32-0550-50020
LF32-10200-1000100
LF32-11100-100050
LF32-25500-2500150
LF32-501000-5000250


Features of Differential Pressure Switch LF32

The LF32 Differential Pressure Switch Consists of


Housings and covers.

Membranes.

Mounting bracket made of sheet steel.

The pressure difference between the two taps causes the spring-loaded diaphragm to deflect. This diaphragm ensures the long-term stability of the switching points. An individual scale is engraved on the sensor body to achieve extremely precise regulation.


Can be delivered in 3 different alternatives

1. Only the pressure switch

2. The pressure switch is separately packed and the duct fixing kit separately packed

3. The pressure switch and the duct fixing kit are packed together in one small carton


On/Off output

Switching pressure to be adjusted easily on a scaled adjustment  knob

Static, over, under pressure, and vacuum

IP54 protection


LF32 is an adjustable differential pressure switch capable of detecting minuscule changes in pressure due to its size and proven design.  The switch setpoint or switching point can be field adjustable without the need for a manometer by simply using the adjustment knob and the built-in calibrated visual scale.  This switch is equipped with a clear cover that not only protects the adjustment knob to be moved involuntary but also provides class IP54 protection.






Application of Differential Pressure Switch LF32

Gas burner, central air conditioning, Building intelligent control,Small blower


LEFOO Application of Differential Pressure Switch LF32


Installation instructions LF32 are supplied with the switch. The switch can be installed in air ducts or on walls. A vertical arrangement is recommended, but any arrangement is in principle possible. Mounting positions other than vertical affect the switching points.

The connecting pipes can be of any length, but the response time is increased if they are longer than 2 meters. The sensor must be installed above the connection points. To prevent condensation, the piping must be routed so that there is a gradual slope away from the pressure connection to the transmitter (no loops).


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