In the industrial and automotive fields, a certain pressure value is usually set for the equipment. When the pressure reaches this value, the system will send an electronic signal to start the mechanical equipment Which triggers a warning(such as a leak of equipment , an alarm, etc. ). This is diaphragm pressure switch. The max pressure can not be exceeded to 300bar, SPDT.

Parameters

Conversion: 1kgf/cm=14.2psi  1bar=14.5psi

LEFOO’s heavy-duty pressure switches are engineered for the core control function in air compressors and water pumping systems. They provide reliable automatic motor control, ensuring optimal pressure levels, equipment protection, and energy efficiency. Our water pump automatic pressure switch are built to last in demanding environments, making them the trusted choice for OEMs and system integrators worldwide.

Targeted Solutions for High-Volume Markets

Air Compressor Systems – OEM & Aftermarket

OEM Integration: The ideal, cost-effective control unit for piston-type air compressors (ranging from small workshop units to large industrial models). Specifications align with standard compressor motor loads and pressure cycles.

Maintenance & Repair (MRO): A perfect aftermarket replacement part due to high failure rates of lower-quality switches. Broad compatibility makes it a must-stock item for servicing common compressor brands across commercial garages, manufacturing plants, and construction sites.

Water Pumping & Pressurization Systems

Domestic & Commercial Water Booster Pumps: Ensures consistent water pressure in multi-story buildings, hotels, and irrigation systems by automatically starting and stopping the pump within a preset pressure band.

Well Pumps & Agricultural Applications: Provides essential dry-run protection and automatic control for submersible and jet pumps, safeguarding critical water supply and irrigation equipment. This addresses a key need in both residential and agricultural (GEO-targeted) sectors.

Why Partner with LEFOO for Pressure Switches?

Superior Reliability for Fewer Returns & Higher Satisfaction

Our switches are built with industrial-grade contacts, robust diaphragms, and precise calibration to withstand millions of cycles. This translates to fewer warranty claims, lower support costs, and stronger end-customer trust in your brand or product line.

LFM52 differential pressure transmitter is the latest release. It has flexiblty of muli-range sensor, high function of single range sensor, and is idealfor industial application. The diferential pressure transmiter has built in multiple optional pressure range and unit selection, andis easlly to adjust through built-in DIP swich. The shell protectis IP65 and equipped with stainless steel conduit for convenient wire arrangement. Itis widely used in HVAC, energy management system, VAV and fan control, clean room pressure, smoke hood control, oven pressurization, furnace ventilation, furnace ventilation control etc.

SPECIFICATION

Features

Adopt high accuracy of MEMS diferential pressure sensor, wide temperature compensation, sensitive pressure response.

5-digit LCD digital display.clear in appearance.

Zero point button available on site. oplional pressure range.

Strong stability, long service life.

Protect level IP65.

There are many differential pressure transmitter manufacturers, but we are the best choice for you.

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The Lefoo LF10 air compressor pressure switch for sale are used to regulate the tank pressure between two preset values on small (up to 200psi) electrically driven air compressors. They are available with an unloader valve, which prevents compressors from starting under load, and an auto-off disconnect lever for manual cut off the compressor. A four port manifold style is available which provides a means for easy mounting of valves and gauges.

Parameters

Conversion: 1kgf/cm²=14.2psi 1bar=14.5psi   

The LEFOO adjustable air compressor pressure switch is available with various thread connections and configuration options to meet different application requirements. Custom connection solutions are available upon request.