KT-T490

What the KT-T490 adds to a 49-inch LG display

The KT-T490 is an infrared touch overlay kit. Rather than replacing the screen, it mounts over a compatible 49-inch LG display and turns that panel into a touch surface. The overlay frame measures 1,132 x 660 x 23.5 mm, with a maximum depth of 60 mm and a 27.0 mm bezel, and the head weighs 8 kg. These figures decide whether the kit suits your wall and your existing display, so check them before anything is ordered.

Touch performance in daily use

The touch layer uses infrared rays spread across the surface and detects objects with a diameter of 8 mm. Touch resolution is 1,428 x 803 with 1 mm accuracy, and the kit tracks up to 10 touch points at once, with a scan time of 9 to 14 ms. The 2.8T anti-glare protection glass helps reduce reflections from ceiling lights and windows, which matters in bright rooms. Touch works in both landscape and portrait orientation.

• Touch resolution: 1,428 x 803
• Accuracy: 1 mm
• Touch points: up to 10
• Interface: USB 2.0
• Power: USB, 1.31 W typical

Compatibility, connection and software

The manufacturer lists six compatible LG models: 49SE3B, 49SM5B, 49SE3KB, 49SM5KB, 49SM3B and 49SL5B. Only these panels are covered by the data for this kit, so match the model code on your screen before you commit. The overlay connects through a USB 2.0 link and takes its power from that connection. Listed operating systems are Windows 7, Windows 8, Mac OS X 10.7 or later, Android, and Linux kernel 3.9 or later. The manufacturer data records no interactive whiteboard software with this kit, so schools and meeting rooms should plan annotation software separately.

Where it fits in Qatar

Three situations suit this kit well:

• A government office in Msheireb or West Bay with 49-inch LG screens in a meeting room, where staff want touch for presentations without buying a new display.
• A private school in Al Wakrah or Al Sadd with existing 49-inch LG panels in classrooms, where teachers need touch at the board.
• A training centre in Education City with a compact seminar room, where a 49-inch touch surface suits a smaller group.

Environment and what to plan

The kit is rated for operation between 0°C and 40°C at 10% to 80% humidity. Summer temperatures in Qatar regularly exceed 45°C, so the display and overlay should sit in an air-conditioned room that stays within that range. Avoid positions where direct sun or a hot window reaches the screen, and confirm the final position with the SmartRooms Qatar team before installation. Plan clearance for the 1,132 mm frame and the 8 kg head, and book a free site survey if the wall or mounting arrangement is unclear.

Ordering a discontinued model

LG has discontinued the KT-T490, so existing owners should record the model and the display it is paired with before any upgrade, and buyers should compare it with current options. Send SmartRooms Qatar your display model, room, operating system and quantity, and request a quote for this kit or for a current equivalent or compatible replacement. Quotations usually come within one working day, and we can issue them against a purchase order (LPO) or a government tender.