Sewa K 3L Light 3 Color Wireless Corridor Light Receiver

KTI0401200WK3LI

Product Description

The Sewa K-3L-Light is a three-color wireless corridor indicator and receiver designed for hospital nurse call stations, clinics, and commercial attendant calling systems.

Make / Brand: Sewa
Model: K-3L-Light (K-3L)
Illumination Colors: 3 distinct LED colors (Red, Blue, Green) for multi-level service and emergency prioritization
Notification Mode: Visual LED blinking and acoustic beeper tone
Operating Frequency: 433.92 MHz (AM modulation)
Transmitter Capacity: Supports pairing with up to 30 wireless call buttons/transmitters
Operating Voltage: DC 12V via dedicated external power supply feed
Enclosure Build: ABS mounting base with high-transmittance acrylic optical dome
Mounting: Surface mount on corridor walls or ceilings
Base Dimensions: 85 mm x 85 mm x 10 mm
Unit Weight: 0.12 kg

KTI0401200WK3LI

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Product Details
Available Brands	Sewa
Unit	Numbers
HSN Code	85176910
Weight	0.12 kg
Warranty	6 Months No-Onsite Warranty
Tags/categories	Automation Office Automation Solutions Attendant Waiter Nurse Calling System

1.00 Nos Ready in Stock Dispatched by Mon, 12th October

About this product .

The Sewa K-3L-Light corridor light receiver provides prompt visual and audible signaling outside patient rooms, examination areas, and hospitality suites. Built with a rugged ABS base and an omnidirectional acrylic dome, the unit delivers wide-angle visibility across long healthcare corridors and commercial hallways.
Equipped with tri-color LED signaling (Red, Blue, and Green), the receiver allows facilities to allocate distinct colors to different alert levels, such as routine nursing assistance, emergency alarms, or staff presence. Dual alert signaling combines bright visual blinking patterns with an integrated beeper tone to ensure staff notice calls immediately.
The unit operates on an RF carrier frequency of 433.92 MHz using AM modulation. With an internal pairing capacity supporting up to 30 wireless transmitters simultaneously, it can be linked to bedside buttons, toilet pull cords, and attendant remotes throughout a zone.
The indicator requires an external DC 12V regulated auxiliary power supply. This hardwired DC configuration ensures 24/7 reliability without the risk of downtime associated with receiver battery depletion.
Engineered for versatile surface mounting, the unit can be mounted directly on over-door corridor walls or overhead ceilings. Periodic visual inspection and routine surface wipe-down of the acrylic dome ensure maximum optical clarity and signaling performance in high-traffic facilities.

Product Information .

Hospitals, Clinics Restaurants Conference Rooms Corporate Offices

System Compatibility and RF Integration Architecture

The Sewa K-3L-Light (Model No.: K-3L-Light) wireless corridor light receiver is engineered for direct compatibility with Sewa wireless nurse call systems, patient bedside call stations, and commercial attendant signaling networks. Built to function as an over-door visual and audible indicator, the unit integrates seamlessly into 433.92 MHz radio frequency (RF) broadcast environments using Amplitude Modulation (AM). It is designed to capture transmissions from distributed call buttons and translate distinct priority levels into multi-color visual alerts and auditory notifications.

RF Carrier Frequency and Transmitter Capacity

The K-3L-Light receiver integrates directly with matching Sewa wireless transmitters operating on the 433.92 MHz carrier frequency with AM modulation. It features an internal pairing capacity supporting up to 30 wireless transmitters simultaneously. In healthcare, clinical, or hospitality infrastructures, a single corridor receiver can bind up to 30 patient bedside calling buttons, emergency pull-cord stations, or attendant call units without requiring a central controller intermediate console.

Operating Frequency: 433.92 MHz RF receiver band
Signal Modulation: AM (Amplitude Modulation)
Maximum Pairing Capacity: Up to 30 discrete wireless transmitters
Alert Notification Output: Dual indicator system utilizing LED light blinking combined with an integrated acoustic beeper tone

Service Type Mapping and Color Coding Compatibility

The unit features three separate internal LED illumination colors—Red, Blue, and Green—housed beneath an acrylic optical dome. The receiver architecture allows system integrators to correlate different calling devices or specific button commands to unique visual states, enabling staff to identify call urgency or service types immediately upon corridor visual contact:

LED Color	Alert Functionality	Supported System Applications
Red	Blinking visual signal with beeper tone	Critical nurse call, emergency alarm, or urgent attendant assistance
Blue	Blinking visual signal with beeper tone	Standard patient assistance, physician alert, or routine attendant request
Green	Blinking visual signal with beeper tone	Service presence acknowledgement, auxiliary request, or secondary hospitality call

Electrical and Power Supply Compatibility

The Sewa K-3L-Light is designed for stationary infrastructure integration and operates on a dedicated external DC 12V power supply. The unit utilizes a separate DC 12V auxiliary power feed rather than integrated power-over-signal lines. Compatibility requires an external regulated DC 12V direct current power source. Where battery-powered calling transmitters are linked wirelessly to this unit, note that when individual transmitter units require cells (they are not included), the K-3L-Light corridor dome itself remains continuously energized via the DC 12V line input.

Mechanical and Structural Mounting Compatibility

Featuring a compact 85 mm x 85 mm x 10 mm ABS base and a lightweight 0.12 kg profile, the K-3L-Light supports mechanical surface mounting on standard interior surfaces. The unit is designed for installation on flat vertical drywall, masonry corridor walls above patient room entryways, or overhead roof and ceiling structures. The acrylic dome cover projects omnidirectional light, ensuring broad visibility along hospital hallways, clinical wings, and hospitality corridors when surface-mounted overhead or over-door.

Installation and Commissioning Guidelines for Sewa K-3L-Light Corridor Receiver

Pre-Installation and Site Planning Requirements

The Sewa K-3L-Light wireless LED corridor indicator receiver is engineered for deployment in clinical nurse call architectures, healthcare wards, clinics, elderly care homes, and commercial service environments. Effective deployment requires evaluating mounting line-of-sight and RF signal pathways to ensure uninterrupted transmission from linked call points.

Because the unit operates on a 433.92 MHz carrier frequency utilizing AM modulation, mounting directly onto large conductive metallic structures, solid steel columns, or dense electrical shielding must be avoided. Direct metal contact can attenuate the 433.92 MHz radio frequency signal and degrade receiver sensitivity. Position the indicator along over-door corridor lintels or overhead ceiling sections where the acrylic optical dome remains prominently visible to attending personnel from multiple viewing angles.

Mechanical Mounting onto Wall or Ceiling Surfaces

The K-3L-Light features a compact ABS mounting base measuring 85 mm x 85 mm x 10 mm with a lightweight overall profile of 0.12 kg. The structural design supports surface-mount installation across two primary orientations:

Over-Door Corridor Wall Mounting: Secure the ABS base directly above patient room entryways, clinic consultation rooms, or service cubicles. This orientation provides direct lateral visibility across the hallway via the acrylic dome.
Roof and Ceiling Mounting: Fasten the ABS base directly to flat roof or ceiling substrates at corridor intersections or above centralized duty stations where 360-degree dome observation is needed.

Ensure the substrate is structurally sound, level, and drilled to match standard surface-mount fasteners appropriate for the wall or ceiling material. The acrylic dome cover should be seated firmly to protect internal optical components from dust accumulation during operation.

Electrical Wiring and Dedicated Power Supply Configuration

The Sewa K-3L-Light does not operate on battery power; it requires a separate external DC 12V regulated power feed. System integrators and electrical contractors must run dedicated low-voltage wiring to the installation point prior to securing the housing.

Operating Voltage: Regulated DC 12V auxiliary line feed.
Power Input Interface: Terminate the external DC 12V positive and negative lines into the dedicated power input on the receiver assembly. Verify voltage stability and terminal polarity before energizing the circuit.
Continuous Line Operation: Interruption of the external DC 12V power supply will result in total loss of visual and audible alert processing. Ensure power is drawn from a stable, continuous auxiliary source.

Wireless Device Pairing and Commissioning

Once power is applied, the K-3L-Light must be paired with the corresponding calling devices. The internal receiver module accommodates up to 30 wireless transmitters simultaneously, including bedside call buttons, pull-cord units, and service pendants operating at 433.92 MHz (AM modulation).

Transmitter Pairing: Enroll each wireless transmitter into the K-3L-Light receiver following the pairing protocol. A maximum of 30 distinct transmitters can be stored in the device's internal memory.
Color Allocation: Map specific transmitter types or service calls to the three integrated LED indicators: Red, Blue, and Green. This allows clinical and hospitality staff to instantly distinguish service categories, emergency calls, or routine attendant requests.
Alert Verification: Actuate each paired calling unit to verify that the integrated dual-notification mechanism triggers properly. Confirm that the corresponding LED color blinks through the acrylic dome and the internal beeper tone sounds reliably upon each test activation.

Application Profiles & Operational Scenarios

Hospital Inpatient Wards and Over-Door Corridor Triage

In acute care wards, specialty clinical units, and multi-bed hospital departments, the Sewa K-3L-Light acts as an over-door wireless corridor visual receiver. Surface-mounted on the wall or roof directly above patient room thresholds via its 85 mm x 85 mm x 10 mm ABS base, the device receives wireless transmissions operating across the 433.92 MHz AM carrier frequency. When a patient triggers a compatible bedside call point, the unit activates its acrylic optical dome with distinct Red, Blue, or Green LED illumination alongside an integrated beeper tone and blinking reminder mode. This provides instant visual triage for roving floor nurses, directing them immediately to the room requiring physical intervention without reliance on auditory-only paging.

Elderly Care and Assisted Living Facility Dispatch

In residential care homes, retirement communities, and hospice wings, rapid visual localization is essential for monitoring resident safety. The K-3L wireless indicator allows caregivers to differentiate between routine requests and critical emergency alerts. By programming paired wireless call stations or pull-cord transmitters to trigger specific color states—such as Red for urgent emergency alerts, Blue for general caregiver assistance, and Green for room presence or call acknowledgment—care teams can prioritize responses across long hallway corridors. The elevated acrylic dome delivers omnidirectional optical dispersion, ensuring that flashing status lights remain clearly legible from any angle along the corridor.

Commercial Hospitality, VIP Lounges, and Attendant Calling

Beyond healthcare environments, the K-3L-Light is deployed across commercial hospitality operations, private dining chambers, executive boardrooms, and attendant-serviced booths. In environments where guest privacy is paramount, service teams rely on multi-color visual cues over doorways to categorize guest requirements without entering the space unprompted. With dedicated color mapping across Red, Blue, and Green channels, facilities designate distinct visual alerts for waiter call requests, bill requests, or supervisory clearance, streamlining workflow coordination and reducing guest response times.

Zoned Multi-Transmitter Monitoring in Modular Facilities

Facilities with multi-bed recovery bays, infusion suites, or partitioned treatment zones utilize the receiver's high pairing capacity, which accepts signals from up to 30 wireless transmitters on a single device. A single K-3L-Light mounted at an entryway or ceiling junction aggregates alerts from multiple patient locations, eliminating redundant display hardware. Powered continuously through an external DC 12V power supply feed, the compact 0.12 kg unit (ITC-HS code 85176910) delivers high-duty cycle performance for high-turnover clinical and hospitality facilities.

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