Heiman HM-720ES-W Interlinked Wireless CO Alarm

The Heiman HM-720ES-W is designed to provide continuous, reliable protection against carbon monoxide hazards in a variety of settings — from private homes and rental properties to hospitality venues and light industrial sites. At its core is an electrochemical CO sensor that delivers fast, accurate detection of harmful gas concentrations; when dangerous levels are detected the unit immediately switches its LED to alarm status and sounds a loud 85 dB alarm to maximise occupant awareness.

A major advantage of this model is its wireless interlink capability: you can pair the HM-720ES-W with up to 40 other compatible Heiman devices so that an alarm on one unit triggers simultaneous alerts across the whole network. That feature is particularly valuable in larger buildings where a localized event must be communicated quickly to all occupants.

Connectivity is extended by mobile-app integration, allowing remote monitoring of CO levels and instant push notifications if the detector senses danger. Built-in self-diagnostics continuously check the detector’s electronics and sensor health and will signal faults via status LEDs and the app, while a dedicated low-voltage alert warns when battery replacement is required. The electrochemical sensor is specified to last up to ten years, reducing the need for frequent replacements and delivering long-term peace of mind.

Practical and easy to use, the HM-720ES-W mounts without complex wiring, is supplied with standard fittings, and requires only routine testing and occasional battery checks. For anyone seeking a dependable, network-capable CO alarm with app support and long sensor life, the Heiman HM-720ES-W is a compelling choice.