SKU: SENS-3323
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Generic 220AC Acoustic-Light Sensor Switch Module - Auto On/Off Light Control

₹219.00 (Inclusive of all taxes)
Out of Stock

This 220V AC Acoustic-Light Sensor Module provides automatic on/off control for lighting loads up to 60W. It integrates a sound-activated switch with a built-in LDR (Light Dependent Resistor) to enable operation only in dark environments, making it ideal for corridor, staircase, and warehouse lighting automation.

Features

  • Dual-mode operation: Sound-activated switching only in dark conditions via onboard LDR.
  • Direct 180-240V AC operation, eliminating the need for a separate DC power supply.
  • Supports a load power of ≤60W for LED/incandescent or ≤35W for energy-saving/fluorescent lamps.
  • Sound sensing range of 4-10 meters for reliable trigger detection.
  • Integrated timer keeps the connected light illuminated for approximately one minute after activation.

Out of stock

Description

The 220AC Acoustic-Light Sensor Module is a self-contained control unit designed for mains-powered lighting automation. It operates on the principle of acoustic detection, where a built-in microphone senses sound events (e.g., claps, footsteps). This acoustic trigger is gated by a photoresistive light sensor (LDR), which ensures the module remains dormant during daylight or other illuminated conditions, activating the switch only when ambient light levels are low.

Engineered for direct integration into 220V AC lighting circuits, the module features robust internal relay switching and transient protection suitable for residential and light commercial environments. Its operation is straightforward: when darkness is detected and a qualifying sound is sensed, the internal relay closes, powering the connected load for a fixed duration before automatically resetting. This design offers a simple, energy-efficient solution for hands-free lighting control.

Key Features

  • Combined acoustic and optical sensing for intelligent, context-aware switching.
  • Direct AC line voltage operation (180-240V, 50/60Hz) simplifies installation.
  • High-value build with a relay rated for frequent switching cycles.
  • Integrated light sensor prevents unnecessary activation during daylight hours.
  • Compact form factor (approx. 5x3x1 cm) for easy enclosure integration.
  • Fixed one-minute illumination timer for balanced energy savings and convenience.
  • Designed for reliable performance in indoor environments like corridors and stairwells.

Applications

  • Hands-free automatic lighting for residential corridors, staircases, and landings.
  • Energy-saving lighting control in utility areas like warehouses, storage rooms, and garages.
  • Convenience lighting for bathrooms or pantries where hands may be full.
  • Basic security lighting activated by sound in entryways or porches.
  • Retrofit automation for existing 220V AC lighting circuits in light commercial settings.

Technical Specifications

Operating VoltageAC 180-240V, 50/60Hz
Rated Voltage220V
Load Power (LED/Incandescent)≤ 60W
Load Power (Energy-saving/Fluorescent)≤ 35W
Sensing PrincipleAcoustic Trigger + LDR Light Gate
Acoustic Sensing Range4 - 10 meters
Activation Delay~1 minute (light-on duration)
Primary ApplicationAutomatic Lighting Control

Frequently Asked Questions

What is the operating voltage range for this sensor module?

The module is designed for direct operation on standard AC mains power, supporting a voltage range of 180 to 240 volts AC at 50/60 Hz. It does not require an external DC power supply or converter, simplifying direct wiring into existing lighting circuits.

How does the module differentiate between day and night operation?

It uses an onboard Light Dependent Resistor (LDR) to measure ambient light levels. When sufficient light is detected (e.g., daytime), the module enters a dormant state and ignores all sound triggers. The acoustic sensor only becomes active and can switch the relay when the LDR detects darkness.

What types of lights can I control with this module, and what are the power limits?

You can control resistive loads like LED and incandescent bulbs up to 60W. For inductive loads such as energy-saving (CFL) or fluorescent lamps, the maximum supported power is 35W due to their higher inrush current. Always ensure your connected load does not exceed these ratings.

How long does the light stay on after being triggered by sound?

Once activated by a sound in a dark environment, the module's internal timer will keep the relay closed and the light powered for approximately one minute. After this period, it automatically turns off and resets, ready to detect the next sound trigger.

What is the effective range for the sound sensor?

The built-in microphone has an effective acoustic sensing range of approximately 4 to 10 meters under typical indoor conditions. The actual range can be influenced by the sound's volume, background noise levels, and the module's mounting location.

Package Includes

  • 1 x 220AC Acoustic-Light Sensor Switch Module

Additional Information

Weight 0.01 kg
Dimensions 3 × 5 × 1 cm