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Witt Sensoric GmbH
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Light curtains for automatic doors
The LIGI complies with the standard requirements of doors and gates.
The intelligent safety light curtain LIGI can be mounted as a optoelectronic safety edge directly onto the gate curtain. When the gate closes, each of the single light-beams are covered in sequence and when opening each in turn is again uncovered. This is registered as a normal movement of the gate and will therefore not trigger an interruption. The entire cover-area is monitored up to a height of 2500mm.
The LIGI makes installation of a optoelectronic safety edge on the door curtain and possibly even of a junction box and spiral cable unnecessary.
A particular advantage is the contact-free detection of obstructions, without a build-up of closing-forces. The LIGI is therefore particularly suitable for older gate systems that exceed the permitted max force-limit.
With its minimal measurements of only 16 x 16mm, the LIGI is simple to install and its filled with epoxy resin aluminum casing is environmentally stable.
The compact LIGI design allows for a monitoring field almost up to the lintel.
LIGI-configurator
Here you can browse through our LIGI variants. Just enter the total height or item number directly or use the filters.
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Preferred variants, color-coded
other light curtain types available on request
LIGI-01 Non-contact safety solution for gates, industrial and garage door applications
Technical data
- powerful, for doors up to 10 m wide
- height of protected area up to 2520mm
- can be mounted inside door guides, due to door blanking function
- easy installation, direct mounting or surface mounting clamps
- extremely robust thanks to fully encapsulated light curtain
- IP 67, resistance to environmental influences
- optional version for car wash facilities
- for all current door controls
- automatic light controls
- integrated service diagnostics
- highly resistant to extraneous light
- compact housing, just 16x16mm
- extensive range of length and beam distribution variants available
- lasered nameplate, legible from front
Just like all of Witt’s products, the new LIGI has been designed especially for the harsh usage conditions of gates, garage and industrial doors. The highly compact and fully encapsulated door light curtain offers perfect protection against moisture and vibrations in everyday door use.
The LIGI features state-of-the-art electronics and even sets standards for the future with its intelligent software. Its compatibility with standard door controllers means that it can be used universally in almost all door systems. Easy installation options allow for fast and uncomplicated installation of the LIGI.
LIGI-10 
Non-contact protective
device with high beam distribution
Technical data
- for doors up to 10 m wide
- height of protected area up to 1523mm
- high resolution, obstacle detection as of Ø 28 mm
- beam geometry up into the boundary area
- universal OSE or semiconductor relay output variants
- automatic light control
- highly resistant to extraneous light
- extensive range of variants
- robust aluminium housing, fully encapsulated
- IP 67, resistance to environmental influences
- universal mounting options
The new LIGI, with its high resolution and robust execution, has been specifically designed for
industrial doors and gates where safe detection in the hand protection range is required. The LIGI can be used as a safety guard for the entire winding reel, as pull-in protection or as clamping protection for door/gate panels.
This means that the mechanical protective housing can be fully dispensed with, which in turn means that the production costs can be reduced and service quality can be significantly improved.
LIGI-10-FLEX 
Non-contact protective device to protect contours with high resolution
Technical data
- perfect adaptation of the protective geometry
- for doors up to 10 m wide
- height of protected area up to 1523mm
- high resolution, obstacle detection as of Ø 28 mm
- closely-meshed protective field for manual protection
- beam geometry up into the boundary area
- universal OSE or semiconductor relay output variants
- automatic light control
- highly resistant to extraneous light
- extensive range of variants
- robust aluminium housing, fully encapsulated
- IP 67, resistance to environmental influences
- universal mounting options
The new LIGI-10-FLEX, with its high resolution and robust execution, has been specifically designed for
industrial doors and gates, where safe detection in the hand protection range is required.
The LIGI can be used as a safety guard for the entire winding reel, as pull-in protection or as clamping protection for door/gate panels.
This means that the mechanical protective housing can be fully dispensed with, which in turn means that the production costs can be reduced and service quality can be significantly improved.
DEGI Non-contact protective device crossed light-beams
Technical data
- for up to 10m
- detection zone 810mm
- with PNP-or SSR-output
- 52 or 46 detection cross beams
- easy adjusting
- fully encapsulated
- degree of protection IP67
- vibration proofsafe drawbar detection
- direct mounting
The DEGI is a light-curtain with crossed light-beams. With this technique even small objects within the area can be safely detected. The robust aluminum casing and the complete embedding with a threaded, high-quality plug connection permit smooth operation even in rough weather conditions.
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