Legrand 240V Photoelectric Smoke Alarm + 9V Battery Backup
Legrand 643085 Photoelectric Smoke Alarm, Detector, 240V with 9V Alkaline Battery Back Up, 85dB @ 3mtr, 147mm Dia x 49mm, Surface Mount, White Legrand Photoelectric smoke alarms see the smoke. They detect visible particles of combustion, eg smoldering cigarette smoke. They respond to a wide range of fires, but they are particularly responsive to smoldering fires and the dense smoke given off by foam filled furnishings or overheated PVC wiring.
Legrand 643085 Photoelectric Smoke Alarm, Detector, 240V with 9V Alkaline Battery Back Up, 85dB @ 3mtr, 147mm Dia x 49mm, Surface Mount, White Legrand Photoelectric smoke alarms see the smoke. They detect visible particles of combustion, eg smoldering cigarette smoke. They respond to a wide range of fires, but they are particularly responsive to smoldering fires and the dense smoke given off by foam filled furnishings or overheated PVC wiring.
Legrand 643085 Photoelectric Smoke Alarm, Detector, 240V with 9V Alkaline Battery Back Up, 85dB @ 3mtr, 147mm Dia x 49mm, Surface Mount, White Legrand Photoelectric smoke alarms see the smoke. They detect visible particles of combustion, eg smoldering cigarette smoke. They respond to a wide range of fires, but they are particularly responsive to smoldering fires and the dense smoke given off by foam filled furnishings or overheated PVC wiring.
Legrand 643085 Photoelectric Smoke Alarm, Detector, 240V with 9V Alkaline Battery Back Up, 85dB @ 3mtr, 147mm Dia x 49mm, Surface Mount, White Legrand Photoelectric smoke alarms see the smoke. They detect visible particles of combustion, eg smoldering cigarette smoke. They respond to a wide range of fires, but they are particularly responsive to smoldering fires and the dense smoke given off by foam filled furnishings or overheated PVC wiring.
in 10 offers
The lowest price for Legrand 240V Photoelectric Smoke Alarm + 9V Battery Backup right now is $39.95 at Bunnings Warehouse, compared across 10 retailers.
The all-time low was $29.99 on 15 Feb 2026 — today's price is 33% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 6 Nov 2026.
Last updated at 06/11/2026 17:01:36
HPM 240v Photoelectric Smoke Alarm
Delivery $10
Legrand 240V Photoelectric Smoke Alarm + 9V Battery Backup - MJS Electrical Supplies
Delivery between 10–17 Nov $9.70
Legrand 240V Photoelectric Smoke Alarm + 9V Battery Backup
Free delivery between Tue – Wed
Legrand 240V Photoelectric Smoke Alarm + 9V Battery Backup
Delivery between 9–17 Nov $10
Legrand 240V Photoelectric Smoke Alarm with 9V Battery Backup White | 643085
Delivery $7.90
Legrand 240V Photoelectric Smoke Alarm with 9V Battery Backup White | 643085
Delivery $7.90
Photoelectric Smoke Alarm 240V Surface Mount 85dB Legrand
Delivery between Sat – Fri on orders of $150+
Legrand Smoke Alarm Wired Mains Powered 1 Year 9V Battery Surface Mount
Hpm 240v Photoelectric Smoke Alarm
Free delivery
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Legrand Smoke Alarm Photoelectric Smoke Alarm, 115 dB, 240V ac, 643085
Delivery $14.25
originally posted on bunnings.com.au
This smoke alarm is absolutely the worst on the market, DO NOT BUY this product unless you want to wake up in the middle of the night for a false alarm.
originally posted on bunnings.com.au
Don’t waste your money!These were installed in my brand new house 4.5 years ago, woken up at 1am to all 3 giving false alarm. Purchased 3 brand new ones the next day and not even 3 weeks later all 3 false alarmed again at 3am. Now it’s going to cost me to get my electrician out to replace all 3 including bases.Don’t buy.
originally posted on ebay.com
Good Quality
| Detected Substances | Smoke |
| Sensor Type | Photoelectric |
| Detection Method | Photoelectric |
| Certifications | ActivFire Certified |
| Standards Compliance | AS 3786:2014 |
HPM 240v Photoelectric Smoke Alarm
Delivery $10
Legrand 240V Photoelectric Smoke Alarm + 9V Battery Backup - MJS Electrical Supplies
Delivery between 10–17 Nov $9.70
Legrand 240V Photoelectric Smoke Alarm + 9V Battery Backup
Free delivery between Tue – Wed
Legrand 240V Photoelectric Smoke Alarm + 9V Battery Backup
Delivery between 9–17 Nov $10
Legrand 240V Photoelectric Smoke Alarm with 9V Battery Backup White | 643085
Delivery $7.90
This smoke alarm is absolutely the worst on the market, DO NOT BUY this product unless you want to wake up in the middle of the night for a false alarm.
Don’t waste your money!These were installed in my brand new house 4.5 years ago, woken up at 1am to all 3 giving false alarm. Purchased 3 brand new ones the next day and not even 3 weeks later all 3 false alarmed again at 3am. Now it’s going to cost me to get my electrician out to replace all 3 including bases.Don’t buy.
Good Quality
My builder has supplied in our new home thinking of 5 years warranty but when i called this company they said only 1 year warranty. After 1 year most of my new smoke alarm is not working. Very rubbish product never buy them.
Good Product the Batteries that came with this were flat. SO I had to purchase More. Product tested perfect
You truly do get what you pay for with these alarms. Constant false alarms after 12 months, regardless of regular cleaning and testing. Rubbish.
I needed to replace the same brand of smoke alarms that were 16 years old. (lifetime recommended is 10 years). I chose the same brand because of the long life of the previous ones. Also they were cost effective.
Great replacement for originally installed unit - same size so no need to touch up paint
| Detected Substances | Smoke |
| Sensor Type | Photoelectric |
| Detection Method | Photoelectric |
| Certifications | ActivFire Certified |
| Standards Compliance | AS 3786:2014 |
