Smoke Alarms

Smoke alarms are an integral element in commercial and domestic safety. Able to detect fires and warn inhabitants, a smoke alarm is the most effective way to ensure fire safety and awareness in a way that doesn’t rely on human detection.

The RS Components range of smoke alarms and fire detection equipment has dependable models from leading brands.

Ionization Smoke Detection

The most common form of smoke alarm are those that rely on ionization. With a special ionized sensor chamber, these alarms sound when smoke particles interrupt the air flow in that sensing chamber. Therefore, as soon as smoke particles get near the smoke alarm, it will sound. Though this makes them vulnerable to false alarms from every day kitchen activities, they remain one of the most effective tools in fire detection, and are believed to respond more swiftly to fast flaming fires than optical smoker detectors.

Optical Smoke Detection

Optical smoke detectors use a pulsing LED in a sensing chamber. When smoke enter this chamber the LED light is reflected and triggers the alarm. Optical smoke detectors are considered to react more swiftly to smouldering fires, and trigger fewer false alarms due to cooking smoke and bathroom steam than ionization versions.

Heat Detection

Some fire alarms rely on the detection of heat rather than smoke to identify fire. Heat detectors have a heat sensitive element that responds to either a ’rate-of-rise’ in temperature, or to a fixed temperature. Rate-of-rise (ROR) detectors measure a sudden increase in temperature, but often also have a fixed temperature that they will respond to. As heat detectors don’t rely on smoke, they are used in areas where air particles might interfere with a smoke detectors correct operation, such as kitchens or laundry rooms.

Battery or Hard-Wired Fire Detection System

Battery operated smoke alarms are very common and cost effective. Because they are independent from any wiring, they can be installed almost anywhere. Their primary disadvantage is that they may run out of battery, but most models will contain a low battery warning or a battery testing button, allowing you to make sure they are always in working order. Many manufacturer’s recommend changing the batteries of a smoke alarm over a fixed schedule, such as every six months or one year, to ensure full confidence in their operation.

Hard-wired smoke alarms, are wired into the mains and are more common in commercial properties. They have the advantage of never running out of batteries, and though they rely on a mains power feed, they are equipped with battery backups in the event of a power cut.

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Description Price Series Type Connection Type Power Indicator Piezo Alarm Material Diameter Depth Operating Voltage
RS Stock No. 240-0553
Mfr. Part No.55000-317
BrandApollo
HK$622.76
Each
units
Series 65 Optical Smoke Detector - - - - - - 9 → 33V dc
RS Stock No. 287-1545
Mfr. Part No.820613
HK$265.75
Each
units
- - - - - - - - -
RS Stock No. 524-5961
Mfr. Part No.RM1100
BrandABUS
HK$143.63
Each
units
- Heat Detector - - - PC 100mm 46 mm 12V dc
RS Stock No. 123-5771
Mfr. Part No.FH450RB
HK$387.13
Each
units
- Heat Detector - Yes - - - - -
RS Stock No. 524-5898
Mfr. Part No.RM1000
BrandABUS
HK$285.25
Each
units
- Optical Smoke Detector - - - PC 98mm 46 mm 12V dc
RS Stock No. 123-5770
Mfr. Part No.FH250RB
HK$358.39
Each
units
- Optical Smoke Detector - Yes - - - - -
RS Stock No. 240-0547
Mfr. Part No.55000-217
BrandApollo
HK$609.55
Each
units
Series 65 Ionisation Detector - - - - - - 17 → 28V dc
RS Stock No. 123-5768
Mfr. Part No.FH250BB
HK$270.12
Each
units
- Smoke Detector - Yes - - - - -
RS Stock No. 123-5769
Mfr. Part No.FH450BB
HK$298.85
Each
units
- Heat Detector - Yes - - - - -
RS Stock No. 123-5778
Mfr. Part No.FHB10W
HK$502.88
Each
units
- Optical Smoke Detector - Yes - - - - -
RS Stock No. 123-5779
Mfr. Part No.FHH10W
HK$544.60
Each
units
- Heat Detector - Yes - - - - -
RS Stock No. 123-5776
Mfr. Part No.FHB10
HK$193.00
Each
units
- Optical Smoke Detector - Yes - - - - -
RS Stock No. 123-5777
Mfr. Part No.FHH10
HK$199.77
Each
units
- Heat Detector - Yes - - - - -
RS Stock No. 123-5774
Mfr. Part No.FH150 Midi
HK$94.02
Each
units
- Smoke Detector - - Yes - - - -
RS Stock No. 169-4643
Mfr. Part No.CSA-FDW24
BrandHoyles
HK$4,601.17
Each
units
- Cigarette Smoke Detector - - - - - - -
RS Stock No. 123-5775
Mfr. Part No.FH155 Midi
HK$110.92
Each
units
- Smoke Detector - - Yes - - - -
RS Stock No. 169-4638
Mfr. Part No.CSA-GOV24
BrandHoyles
HK$2,258.19
Each
units
- Cigarette Smoke Detector - - - - - - -
RS Stock No. 169-4637
Mfr. Part No.CSA-FGV24
BrandHoyles
HK$4,267.30
Each
units
- Cigarette Smoke Detector - - - - - - -
RS Stock No. 123-5772
Mfr. Part No.FH500R
HK$370.69
Each
units
- Mount - - Yes - - - -
RS Stock No. 169-4645
Mfr. Part No.CSA-AVC3
BrandHoyles
HK$724.20
Each
units
- Cigarette Smoke Detector - - - Steel - - -
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