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 Sound Level Power Indicator Low Power Warning Signal Piezo Alarm Material Diameter Depth Operating Voltage
RS Stock No. 183-7312
Mfr. Part No.SA300UKX5
kr 75,25
Each
Units
- Smoke Detector 85dB - - - - 104mm 35 mm 9V dc
RS Stock No. 123-5769
Mfr. Part No.FH450BB
kr 343,73
Each
Units
- Heat Detector - Yes - - - - - -
RS Stock No. 183-7317
Mfr. Part No.SCO5UK
kr 411,25
Each
Units
- Optical Smoke Detector 85dB - - - - 120mm 50 mm -
RS Stock No. 123-5777
Mfr. Part No.FHH10
kr 229,73
Each
Units
- Heat Detector - Yes - - - - - -
RS Stock No. 169-4638
Mfr. Part No.CSA-GOV24
BrandHoyles
kr 2 546,34
Each
Units
- Cigarette Smoke Detector - - - - - - - -
RS Stock No. 183-7310
Mfr. Part No.690MBX
BrandBRK
kr 298,78
Each
Units
- Thermistor Smoke Detector 85dB Yes Yes - - 140mm 58 mm 230V ac
RS Stock No. 123-5768
Mfr. Part No.FH250BB
kr 310,68
Each
Units
- Smoke Detector - Yes - - - - - -
RS Stock No. 183-7313
Mfr. Part No.SA700LUKX5
kr 159,86
Each
Units
- Optical Smoke Detector 85dB - - - - 86mm 37 mm -
RS Stock No. 183-7309
Mfr. Part No.760MRL
BrandBRK
kr 577,42
Each
Units
- Optical Smoke Detector 85dB Yes Yes - - 140mm 53 mm 230V ac
RS Stock No. 123-5770
Mfr. Part No.FH250RB
kr 412,17
Each
Units
- Optical Smoke Detector - Yes - - - - - -
RS Stock No. 123-5776
Mfr. Part No.FHB10
kr 216,51
Each
Units
- Optical Smoke Detector - Yes - - - - - -
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