HomeGuard Dual Smoke & Carbon Monoxide Alarm With CO Alert | Lersk

Protect your home with the HomeGuard Dual Smoke & Carbon Monoxide Alarm With CO Alert. This compact, battery-powered detector delivers reliable protection by sensing both smoke and carbon monoxide, helping safeguard you and your family from potential hazards.

Easy to operate and read, it features a digital LCD display (optional) for clear CO readings, a green power indicator, and a loud 85 dB alarm to ensure alerts are heard throughout the home.

Key features

• Combined protection: Detects smoke and carbon monoxide with a single unit.
• Clear CO readings: Optional 4-digit LCD display shows the level of CO being sensed.
• Audible and visual alerts: 85 dB alarm at 1 metre, red LED during alarm, green LED for normal operation.
• Battery powered: Runs on 3 x AA batteries (not included); standby current < 50 μA; alarm current < 50 mA.
• Compact and wall-mountable: Size 10 x 4 cm; designed for easy installation on a wall.
• Smart indicators: Low-battery chirp every 30 seconds with "Lb" on LCD; malfunction indicator chirps with "Err" on LCD.
• Test and reset: Test/reset button for weekly checks and to reset the unit after a CO alarm.
• Power efficiency: Low power consumption at approximately 0.3 mW.

How it works

The device provides rapid protection with CO detection times depending on concentration: typically 60–90 minutes at 50 ppm, 10–40 minutes at 100 ppm, and as quick as 3 minutes at 300 ppm. In normal operation, the green LED flashes every 30 seconds. When a CO reading is required, the LED flashes briefly; during an alarm the red LED pulses and the audible alert sounds in a repeating cycle—four short beeps, five seconds of silence, then four more beeps—until the CO is eliminated or the unit is reset.

For reliable performance, regularly test the unit using the built-in test/reset button and replace batteries as needed. This HomeGuard alarm is designed for easy wall mounting, offering a compact, lightweight form factor and a straightforward interface that keeps you informed about CO levels in real time.