The FG731 is a stand-alone carbon monoxide detector powered by long-life internal batteries, providing up to 5 years of continuous protection without the need for wiring or connection to a fire alarm control panel. Featuring a Japan-made electrochemical CO sensor with automatic adjustment and advanced detection algorithms, it delivers highly accurate CO detection with strong immunity against nuisance alarms.

Smart Detection, Clear Indication
Three separate LED indicators provide instant status clarity — green for power, red for alarm, and yellow for service required. When CO levels reach dangerous thresholds, the internal 85 dB sounder activates to alert occupants. A dual-function button allows temporary alarm silencing (Hush mode) during suspected false alarm conditions, and doubles as a test button to verify correct operation.

Tiered Alarm Response
The FG731 responds proportionally to CO concentration levels, triggering alarms progressively based on exposure time and concentration — from 70 ppm over 60–240 minutes through to 400 ppm within just 4–15 minutes — in line with recognised CO safety standards.

Hassle-Free Ownership
No programming is required for installation. A built-in 5-year end-of-life timer audibly alerts the owner when the unit is due for replacement, and a low battery audible indication ensures the detector is never left unprotected.

Key Specifications

• Operating Voltage: DC 4.5V (3 × AA batteries)
• Sensing Cell: Electrochemical
• Alarm Thresholds: 70 ppm (60–240 min) / 150 ppm (10–50 min) / 400 ppm (4–15 min)
• Sounder Output: ≥85 dB @ 3m
• Operating Temperature: +4.4°C to +37.8°C
• Operating Humidity: 15–90% RH (non-condensing)
• Dimensions: 64 × 112 × 44mm