SAFETY BY MECHANICAL DESIGN

Contacts That Open Even When They Weld Shut.

A safety limit switch monitors guard doors, covers, and hazardous zones on machinery. The direct opening mechanism forces the contacts apart by physical action, the structure that safety standards require for guard circuits.

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PRODUCT SERIES

Each Series Matches A Different Level Of Machine Guarding.

Click any series to browse its individual models and download technical documentation.

T4N Miniature Safety Limit Switch

Miniature body for tight guard frames. Gold-plated contacts carry full motor loads down to low-current signals, and the NC circuit uses a positive opening mechanism.

T4NR Manual Reset Limit Switch

Adds a blue manual reset ring to the T4N mechanism. Once the switch trips, the contacts stay open until an operator pulls the ring and checks the zone.

T4NS/T4NS-SK Safety Interlock Switch

A key-operated interlock for guard doors. Pulling the key drives the contacts open through the same direct opening action, and the key stays captured until the door closes. Replacement keys fit common market door locks.

QUALITY AND PRODUCTION

The Quality We Demand Of Ourselves Is Your Confidence In The Machine.

Here is how we hold that standard.

TUV Rheinland certified, plus CE, UKCA, CB, and CCC. These are the marks safety inspectors look for.
A code on the switch links it to its batch, so when a fault appears we can trace it and check the other switches from that batch.
The sample you approve is the switch we ship, and one factory is responsible for it from start to finish.
If a switch fails, we replace it with a new one.

Which Series Fits Your Guard Door?

Send the door size, the actuator direction, and the fault scenario you design against. We will point you to the right series.

Download the catalog

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WHERE LIMIT SWITCHES WORK

Machines Where A Welded Contact Must Still Stop The Cycle.

Elevator Systems

Landing door interlock switches confirm a door is closed before the car moves. Direct opening contacts break the door circuit mechanically when the door opens.

See elevator applications

CNC & Machine Tools

Enclosure door interlock switches stop spindle and axis motion while the door is open. Manual reset versions keep the machine stopped until the operator closes and checks the door.

See CNC applications

Injection Molding

Mold gate switches stop the clamp while the operator works in the mold area. With a manual reset switch, restart happens only after the operator resets at the gate.

See molding applications

Conveyor & Sorting

Jam doors and access panels along a sorting line carry interlock switches on the drive circuit. The drive stays locked while any panel reports open.

See conveyor applications

Cannot Find The Right Safety Configuration In The Standard Range?

Send the guard layout and the standard your machine certifies to. We will confirm a standard model or scope a custom build, and answer urgent requests the same day.

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About custom builds