Secure your property with the GT240, a professional-grade photoelectric smoke alarm engineered for the early detection of smouldering fires. Operating on 240V mains power, this unit features a replaceable 9V alkaline battery backup to provide uninterrupted protection for your household, even during a complete power failure. The GT240 smoke alarm utilises advanced split-spectrum sensor technology to maintain high sensitivity while significantly reducing nuisance false alarms. For added convenience, you can silence the unit instantly using a standard TV remote. While it works perfectly as a standalone alarm, you can easily upgrade your safety by adding a GTRFM wireless module to each unit, allowing up to 24 alarms to activate simultaneously when one detects danger.
Secure your property with the GT240, a professional-grade photoelectric smoke alarm engineered for the early detection of smouldering fires. Operating on 240V mains power, this unit features a replaceable 9V alkaline battery backup to provide uninterrupted protection for your household, even during a complete power failure. The GT240 smoke alarm utilises advanced split-spectrum sensor technology to maintain high sensitivity while significantly reducing nuisance false alarms. For added convenience, you can silence the unit instantly using a standard TV remote. While it works perfectly as a standalone alarm, you can easily upgrade your safety by adding a GTRFM wireless module to each unit, allowing up to 24 alarms to activate simultaneously when one detects danger.
in 9 offers
GT240 Smoke Alarm
Secure your property with the GT240, a professional-grade photoelectric smoke alarm engineered for the early detection of smouldering fires. Operating on 240V mains power, this unit features a replaceable 9V alkaline battery backup to provide uninterrupted protection for your household, even during a complete power failure. The GT240 smoke alarm utilises advanced split-spectrum sensor technology to maintain high sensitivity while significantly reducing nuisance false alarms. For added convenience, you can silence the unit instantly using a standard TV remote. While it works perfectly as a standalone alarm, you can easily upgrade your safety by adding a GTRFM wireless module to each unit, allowing up to 24 alarms to activate simultaneously when one detects danger.
Secure your property with the GT240, a professional-grade photoelectric smoke alarm engineered for the early detection of smouldering fires. Operating on 240V mains power, this unit features a replaceable 9V alkaline battery backup to provide uninterrupted protection for your household, even during a complete power failure. The GT240 smoke alarm utilises advanced split-spectrum sensor technology to maintain high sensitivity while significantly reducing nuisance false alarms. For added convenience, you can silence the unit instantly using a standard TV remote. While it works perfectly as a standalone alarm, you can easily upgrade your safety by adding a GTRFM wireless module to each unit, allowing up to 24 alarms to activate simultaneously when one detects danger.
The lowest price for GT240 Smoke Alarm right now is $27.85 at SparkyDirect.com.au, compared across 9 retailers.
The all-time low was $27.45 on 2 Sept 2026 — today's price is 1% above the lowest ever. This is at or near its all-time low — a good time to buy.
Prices last updated 5 Nov 2026.
Last updated at 05/11/2026 06:48:51
GT Smoke Alarms GT240 | 240V Mains Smoke Alarm | 9V Battery Backup
GT Smoke Alarms GT240 | 240V Mains Smoke Alarm | 9V Battery Backup
Delivery $15.95
GT Smoke Alarms GT240 | 240V Mains Smoke Alarm | 9V Battery Backup
Delivery $15.95
GT Smoke Alarms GT240 | 240V Mains Smoke Alarm | 9V Battery Backup
Delivery $15.95
GT Smoke Alarms GT240 | 240V Mains Smoke Alarm | 9V Battery Backup
Delivery $15.95
GT High Performance 240v Photoelectric mains powered smoke alarm with 9v battery backup
GT240 Photoelectric Smoke Alarm with Dual Power & 9V Battery Backup - White
Delivery between 9–18 Nov $14.90
GT240 Photoelectric Smoke Alarm with Dual Power & 9V Battery Backup - White
Delivery between 9–18 Nov $14.90
240V SMOKE ALARM WITH 9V
Delivery $14.99
| Detected Substances | Smoke |
| Alarm Sound Level | 85 dB(A) @ 3m |
| Battery Life | 10 year |
| Power Source | Battery Operated |
| Battery Type | Lithium |
GT Smoke Alarms GT240 | 240V Mains Smoke Alarm | 9V Battery Backup
GT Smoke Alarms GT240 | 240V Mains Smoke Alarm | 9V Battery Backup
Delivery $15.95
GT Smoke Alarms GT240 | 240V Mains Smoke Alarm | 9V Battery Backup
Delivery $15.95
GT Smoke Alarms GT240 | 240V Mains Smoke Alarm | 9V Battery Backup
Delivery $15.95
GT Smoke Alarms GT240 | 240V Mains Smoke Alarm | 9V Battery Backup
Delivery $15.95
| Detected Substances | Smoke |
| Alarm Sound Level | 85 dB(A) @ 3m |
| Battery Life | 10 year |
| Power Source | Battery Operated |
| Battery Type | Lithium |
