Smoke sensor (with relay output)

This smoke sensor module features a relay output, allowing you to detect smoke presence while directly driving a power circuit. It is an excellent choice for home security projects or alarm systems based on Arduino, Raspberry Pi, and ESP32 platforms.

The module includes a potentiometer for sensitivity adjustment and an LED indicator. The relay output provides dry contacts (Normally Open, Normally Closed, and Common), making it easy to interface with various actuators such as sirens or exhaust fans.

Specifications

• Operating Voltage: 9V DC
• Standby Current: 10 µA
• Induced Current: Less than 30 mA
• Output Type: Relay (NO, NC, COM) and Digital Signal (High/Low)
• Sensitivity: Adjustable via potentiometer
• Operating Temperature: -5°C to 50°C

Wiring Instructions

• Black: Power Ground (GND)
• Red: Positive Power Supply (+9V)
• White: Relay Normally Open (NO)
• Blue: Relay Common (COM)
• Green: Relay Normally Closed (NC)

Note: To test the module, press the button for 3 seconds until the LED flashes. Then expose the sensor to smoke to verify relay activation.