About this item

• ✔ Advanced Microwave Motion Detection Uses 5.8GHz CW microwave radar technology to detect moving people with high accuracy. Detection is possible through glass, wooden doors, and thin walls, providing more reliable sensing than traditional infrared sensors.
• ✔ Adjustable Detection Settings Customize operation according to your environment with adjustable: Detection Sensitivity Time Delay (10 sec to 12 min) Daylight Sensor (3–2000 Lux)
• ✔ 360° Coverage Wide 360-degree detection angle with adjustable sensing distance up to 8 meters radius, ideal for residential and commercial indoor lighting automation.
• ✔ Supports High Load Capacity Compatible with: 1200W Incandescent Lamps 300W LED Lighting Suitable for LED panels, ceiling lights, corridor lights, parking lights, washrooms, offices, staircases, warehouses and more.
• ✔ Safe & Energy Efficient Consumes only approximately 0.9W during operation while providing intelligent automatic lighting control. Low microwave transmission power (<0.2mW) ensures safe operation.

Product Description

LEYDEN LS-LDN753 5.8GHz Microwave Motion Sensor

The LEYDEN LS-LDN753 is a concealed ceiling-mounted microwave motion sensor designed for automatic lighting control in homes, offices, commercial buildings, corridors, staircases, washrooms, parking areas, warehouses, hotels, hospitals, and educational institutions.

Unlike conventional PIR sensors, the LS-LDN753 utilizes 5.8GHz CW microwave radar technology, allowing motion detection through glass, doors, and thin non-metallic walls while maintaining high sensitivity and reliability.

The sensor automatically switches connected lighting ON when movement is detected and turns it OFF after the preset delay, helping reduce unnecessary electricity consumption.

Three adjustable controls allow users to configure:

• Detection Distance
• Time Delay
• Ambient Light Threshold

Its compact concealed ceiling design provides a clean appearance while offering dependable indoor occupancy sensing.

Technical Specifications

Box Contents

• 1 × LEYDEN LS-LDN753 Microwave Motion Sensor
• 1 × Instruction Manual

Applications

• Home Lighting
• Office Lighting
• Staircases
• Corridors
• Parking Areas
• Warehouses
• Hotels
• Hospitals
• Washrooms
• Basements
• Commercial Buildings
• Meeting Rooms
• Storage Rooms

Search Keywords (Backend Search Terms)

microwave motion sensor, radar motion sensor, ceiling motion detector, occupancy sensor, microwave occupancy sensor, 5.8GHz motion sensor, automatic light sensor, concealed ceiling sensor, recessed motion sensor, motion detector for lights, radar sensor switch, ceiling occupancy detector, led motion sensor, staircase light sensor, corridor light sensor, office motion sensor, home automation sensor, automatic lighting switch, microwave radar detector, indoor motion sensor

Installation Guide

Wiring

Terminal Connections

L → Live Input (Phase)

N → Neutral Input

L' → Switched Live Output to Load

Neutral of the load connects directly to Neutral supply.

Installation Steps

1. Switch OFF the mains power.
2. Remove the transparent bottom cover.
3. Connect wiring according to the wiring diagram.
4. Tighten terminal screws securely.
5. Reinstall the transparent cover.
6. Compress both spring clips.
7. Insert the sensor into the ceiling cut-out.
8. Release spring clips to lock the sensor.
9. Restore power.
10. Test the sensor operation.

Adjustment Settings

TIME

Adjusts how long the light remains ON after motion stops.

• Minimum: 10 Seconds
• Maximum: 12 Minutes

LUX

Controls the ambient light level at which the sensor operates.

☀ Sun Position

• Operates Day & Night

???? Minimum (3 Lux)

• Operates only in darkness

SENS

Adjusts microwave detection distance.

• Low Setting
• Short detection range
• High Setting
• Maximum detection range

Testing Procedure

1. Set LUX to Sun.
2. Set SENS to Maximum.
3. Set TIME to Minimum.
4. Turn ON power.
5. Light turns ON immediately.
6. After approximately 10 seconds, the light turns OFF.
7. Walk into the detection area.
8. The light should switch ON automatically.
9. Every new movement restarts the timer.
10. For night-only operation, rotate the LUX control toward 3 Lux.

Safety Instructions

• Installation should be performed by a qualified electrician.
• Disconnect power before wiring.
• Indoor use only (IP20).
• Do not install on vibrating or unstable surfaces.
• Keep away from large metal surfaces that may affect microwave sensing.
• Avoid installation directly behind metal objects.
• Do not disassemble the sensor.
• Ensure correct supply voltage before installation.
• Use within the specified load capacity only.

Troubleshooting

Light does not turn ON

• Check power supply.
• Verify wiring.
• Check connected load.
• Ensure ambient light level matches LUX setting.
• Verify supply voltage.

Poor Detection

• Increase sensitivity.
• Verify installation height.
• Remove obstacles.
• Avoid excessive ambient heat sources.

Light Does Not Turn OFF

• Continuous movement exists within detection area.
• Time delay set too high.
• Incorrect installation location.
• Check for moving objects within sensing range.

Warranty

• 1 Year Limited Warranty against manufacturing defects.
• Warranty does not cover improper wiring, overload, water damage, physical damage, unauthorized repair, or misuse.

Important Notes

• Microwave output power is less than 0.2mW, approximately 1/5000th of the transmission power of a typical mobile phone, making it safe for indoor operation.
• Detection may occur through glass, wooden doors, and thin non-metallic walls.
• Best performance is achieved when installed between 1.5m and 3.5m ceiling height.
• Designed for indoor applications only (IP20).