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 Connection Type Power Indicator Low Power Warning Signal Piezo Alarm Material Diameter Depth Operating Voltage
RS Stock No. 740-8066
Mfr. Part No.5TC1296
BrandSiemens
kr 473,99
Each
Units
DELTA reflex Smoke Detector 85dB - - - - - - - 230 V, 9 V
RS Stock No. 524-5961
Mfr. Part No.RM1100
BrandABUS
kr 245,07
Each
Units
- Heat Detector - - - - - PC 100mm 46 mm 12V dc
RS Stock No. 524-5898
Mfr. Part No.RM1000
BrandABUS
kr 384,81
Each
Units
- Optical Smoke Detector - - - - - PC 98mm 46 mm 12V dc
RS Stock No. 287-1545
Mfr. Part No.820613
kr 346,56
Each
Units
- Ionisation Detector - - - - - - - - -
RS Stock No. 123-5774
Mfr. Part No.FH150 Midi
kr 128,05
Each
Units
- Smoke Detector - - - - Yes - - - -
RS Stock No. 230-0838
Mfr. Part No.EFXN526
BrandEaton
kr 208,16
Each
Units
Fulleon Heat Detector - Wired - - - - - - -
RS Stock No. 123-5778
Mfr. Part No.FHB10W
kr 717,53
Each
Units
- Optical Smoke Detector - - Yes - - - - - -
New
RS Stock No. 246-2736
Mfr. Part No.2CDG430079R0011
BrandABB
kr 1 588,12
Each
Units
FC650 Smoke Detector - Wired - - - - - - -
New
RS Stock No. 248-9531
Mfr. Part No.S54310-F101-A1
BrandSiemens
kr 602,12
Each
Units
OP Optical Smoke Detector - - No - - - - - -
RS Stock No. 230-0839
Mfr. Part No.EFXN533
BrandEaton
kr 196,35
Each
Units
Fulleon Optical Smoke Detector - Wired - - - - - - -
RS Stock No. 123-5771
Mfr. Part No.FH450RB
kr 502,51
Each
Units
- Heat Detector - - Yes - - - - - -
New
RS Stock No. 246-2737
Mfr. Part No.2CDG430081R0011
BrandABB
kr 1 340,58
Each
Units
FC650 Thermistor Smoke Detector - Wired - - - - - - -
New
RS Stock No. 248-9494
Mfr. Part No.A5Q00004439
BrandSiemens
kr 1 582,73
Each
Units
FDB Heat Detector - Wired No - - - - - -
New
RS Stock No. 248-9557
Mfr. Part No.S54320-F7-A3
BrandSiemens
kr 1 651,54
Each
Units
OOH740 Smoke Detector - - No - - - - - -
RS Stock No. 230-0837
Mfr. Part No.EFXN525
BrandEaton
kr 210,19
Each
Units
Fulleon Heat Detector - Wired - - - - - - -
RS Stock No. 123-5769
Mfr. Part No.FH450BB
kr 387,97
Each
Units
- Heat Detector - - Yes - - - - - -
RS Stock No. 123-5779
Mfr. Part No.FHH10W
kr 781,33
Each
Units
- Heat Detector - - Yes - - - - - -
New
RS Stock No. 248-9558
Mfr. Part No.S54320-F8-A3
BrandSiemens
kr 2 259,40
Each
Units
OOH740 Smoke Detector - - No - - - - - -
RS Stock No. 169-4637
Mfr. Part No.CSA-FGV24
BrandHoyles
kr 5 872,93
Each
Units
- Cigarette Smoke Detector - - - - - - - - -
RS Stock No. 123-5777
Mfr. Part No.FHH10
kr 272,18
Each
Units
- Heat Detector - - Yes - - - - - -