Waterproof and dustproofdesign (IP67)
Compact size andcompact structure
Long lifespan andhigh reliability
100% Manufactory
Set up since 2012, our company own the factory, and experienced.
PROFESSIONAL MANUFACTURER OF MICRO SWITCHES
Waterproof and dustproofdesign (IP67)
Compact size andcompact structure
Long lifespan andhigh reliability
Product Quality
Uiled have obtained relevant CCC, CQC, UL, VDE, CE, ENEC enterprise and relevant product certifications.
Sales Market
We have gained a global sales network reaching many countries over North America, South America, Europe, Africa and South East Asia.
After-Sales Service
A complete service network has been established to respond to user requests within 24 hours.
PRODUCTS
The core products include micro switches and travel limit Switch, push button switch, foot switch, toggle switch, AC power socket.
The core products include micro switches and travel limit Switch, push button switch, foot switch, toggle switch, AC power socket.
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ABOUT LEMA
Lema is committed to R&D, production and sales of industrial control electrical switches. The company's core products include micro switches and travel limit Switches, push button switches, foot switches, toggle switches, AC power socket.
After nearly 30 years of steady development, Lema has become a large-scale professional manufacturer of micro switches in China. The company currently covers an area of more than 11,000 square meters.
2000Years
Established in
40+
Exporting countries and regions
10000m2
Factory floor area
60+
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APPLICATION
Committed to research and development, production, sales of industrial electrical switches and connectors
INDUSTRIAL
AUTOMATION
Industrial automation empowers smart manufacturing with reduced manual labor, higher precision, and greater efficiency.
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Hazardous Location Limit Switches: Review Approval Before Selection
Hazardous location limit switches must be selected against the area's classification, the substances present and the equipment's applicable approval conditions. A metal housing, an IP rating or a familiar roller lever does not establish explosion protection. Start with a competent site classification and verify the exact device and installation evidence before purchasing. The LEMA LZ1 product family is referenced here to explain ordinary mechanical-switch interfaces. This article does not claim that an LZ1 variant is approved for a hazardous location. Without exact applicable evidence, do not substitute an ordinary industrial switch into a classified installation. Establish the area classification before comparing switches “Hazardous” is sometimes used informally to describe any dangerous machine. Electrical hazardous-location selection has a more specific context: potentially explosive atmospheres and the requirements for equipment installed there. Mechanical trapping hazards, electrical shock and explosion risks can coexist, but they are different assessment questions. A switch suited to ordinary machine travel detection is not automatically appropriate for every environment around that machine. The HSE overview of ATEX and explosive atmospheres explains the relationship between potentially explosive atmospheres, workplace responsibilities and equipment requirements in its jurisdiction. Use the classification and rules applicable to the installation location. Do not translate an informal description such as “chemical factory” into an equipment approval requirement without the responsible site's documented assessment. Obtain the classification drawing and the substance information relevant to the switch location. The conditions at a loading point may differ from those in a nearby control room. The position of the enclosure, actuator and wiring route all matter. Purchasing should receive the approved requirements rather than being expected to infer a classification from a process photograph or the name of the...
↗Power Inlet Pollution Degree: Define the Insulation Environment
Power inlet pollution degree describes the expected contamination conditions affecting insulation in the relevant equipment environment. It is not a measure of outdoor air quality, a waterproof rating or a shortcut to selecting an inlet by current alone. Define the microenvironment around the insulating paths, including dust, moisture and possible condensation, then review the component and finished assembly under the applicable equipment requirements. For the LEMA IPZ inlet family, request evidence for the exact ordered version and intended installation. This guide does not assign a pollution degree, approval or permissible spacing to an unidentified IPZ variant. Define the environment at the insulation A factory can have dusty production areas while a protected compartment remains comparatively clean. Conversely, a cabinet installed in an ordinary room can draw contaminated air through a fan or collect condensation during temperature changes. The relevant question is what reaches the insulation being assessed over the equipment's intended use, not simply whether the building is described as indoor or outdoor. The IEC insulation coordination publication covers clearances, creepage distances and criteria for solid insulation within its stated scope. NI's explanation of pollution degree describes how contamination categories relate to electrical equipment and insulation distances. Use these sources to frame the review; obtain the applicable requirements and full component evidence before choosing actual limits. Map the inlet region separately from other parts of the machine. The accessible mating side, the internal terminals and nearby insulating surfaces may experience different conditions. An external panel gasket may protect one interface while leaving internal wiring exposed to cabinet contamination. A useful drawing identifies the path being assessed, the boundary relied on and the environmental assumption behind it. IPZ-4 flange and three...
↗Micro Switch Altitude Derating: Separate Electrical and Thermal Limits
Micro switch altitude derating requires separate reviews of insulation, contact switching and heat in the installed equipment. A current and voltage marking alone does not establish suitability at a mountain site or in a reduced-pressure enclosure. Ask the supplier for the exact variant's environmental limits, then assess the assembly under its applicable equipment standard. Do not borrow a correction factor from a motor, breaker or unrelated switch. For the LEMA KW7 series, this article provides an application-review workflow; it does not assign a new altitude rating or establish that any particular version has passed reduced-pressure testing. Why altitude belongs in the equipment specification A machine originally built for a low-elevation factory may later be ordered for a mountain installation. Its drawing can remain identical while the environment changes. Altitude affects atmospheric conditions, and pressure matters when reviewing electrical paths through air. The local air temperature, enclosure ventilation and operating load also deserve attention. These influences must be described together rather than compressed into a single unexplained percentage. The NASA atmosphere model illustrates how pressure, temperature and density vary with height in a simplified atmosphere. It explains the physical background, not the rating of an electrical component. Actual equipment can have a different internal temperature or pressure from the surrounding weather. Record whether the switch is inside an unpressurized cabinet, a controlled enclosure or another defined environment before choosing the assessment conditions. An altitude requirement should travel with the purchase specification. If it appears only in a late installation email, the component supplier may never have considered it. The practical first step is to add the maximum intended operating elevation, the relevant pressure conditions where known, and the enclosure arrangement to...
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