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Carbon Monoxide Alarm HM-733ESY series

Heiman Advanced Carbon Monoxide (CO) Alarm is a 24/7 monitoring solution, engineered and rigorously tested to detect dangerous CO accumulation in domestic settings—delivering comprehensive home safety coverage.（This product offers multiple models and configuration options. Specific specifications and parameters are subject to confirmation by official customer service.）

Eliminate the "invisible killer": Our 24/7 CO monitoring solution

Carbon monoxide (CO) is the "silent killer"—invisible, odourless, and deadly. Our Heiman CO Alarm is a premium 24/7 monitoring solution that goes beyond basic protection: blending cutting-edge technology with intuitive design, it safeguards your home against harmful CO leaks. Whether you’re asleep, at work, or away—we’ve got your home protected 24/7.
Electrochemical Sensor: Precise CO Detection – Sleep Safe

Our Heiman CO Alarm features a high-sensitivity electrochemical CO sensor – the gold standard for CO detection. Engineered to respond exclusively to carbon monoxide, it triggers a precise alarm at levels as low as 50ppm, delivering zero sensor drift and no false alerts. As a indoor CO alarm, it detects hidden CO buildup even while you sleep, shielding you from the silent killer.
Automatic Fault Detection: Distinct Alerts + Flexible Muting – Simplified Fault Resolution

It continuously monitors sensor and circuit status. In case of sensor failure or short circuit, the device immediately triggers clear alerts: the yellow LED flashes twice every 60 seconds, and the buzzer emits two beeps simultaneously—providing a clear fault indication to prevent hidden risks from being overlooked.
Real-Time LCD Display: Visible CO Levels, Proactive Safety

Our Heiman CO Alarm features a crisp LCD display that shows real-time CO levels (in ppm) – so you don’t have to wait for an alarm to identify hazards. On a daily basis, it displays "0ppm" – your clear safe level indicator. Even minor CO increases (e.g., from poor kitchen ventilation or faulty heating) are shown early, letting you take proactive steps to avoid risks.