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. 240-0553
Mfr. Part No.55000-317
BrandApollo
€70.43
Each
units
Series 65 Optical Smoke Detector - - - - - - - - 9 → 33V dc
RS Stock No. 240-0581
Mfr. Part No.55000-122
BrandApollo
€35.37
Each
units
Series 65 Heat Detector - - - - - - - - 17 → 28V dc
RS Stock No. 123-5774
Mfr. Part No.FH150 Midi
€10.63
Each
units
- - - - - - Yes - - - -
RS Stock No. 740-8066
Mfr. Part No.5TC1296
BrandSiemens
€37.20
Each
units
DELTA reflex Smoke Detector 85dB - - - - - - - 9 V, 230 V
RS Stock No. 123-5775
Mfr. Part No.FH155 Midi
€12.55
Each
units
- - - - - - Yes - - - -
RS Stock No. 240-0547
Mfr. Part No.55000-217
BrandApollo
€68.94
Each
units
Series 65 Ionisation Detector - - - - - - - - 17 → 28V dc
RS Stock No. 123-5776
Mfr. Part No.FHB10
€21.29
Each
units
- - - - Yes - - - - - -
RS Stock No. 123-5773
Mfr. Part No.FH550RF
€64.94
Each
units
- - - - - - Yes - - - -
RS Stock No. 123-5772
Mfr. Part No.FH500R
€41.93
Each
units
- - - - - - Yes - - - -
RS Stock No. 524-5898
Mfr. Part No.RM1000
BrandABUS
€32.02
Each
units
- - - - - - - PC - - -
RS Stock No. 524-5961
Mfr. Part No.RM1100
BrandABUS
€20.74
Each
units
- - - - - - - PC - - -
RS Stock No. 123-5771
Mfr. Part No.FH450RB
€43.78
Each
units
- - - - Yes - - - - - -
RS Stock No. 123-5770
Mfr. Part No.FH250RB
€40.53
Each
units
- - - - Yes - - - - - -
RS Stock No. 123-5768
Mfr. Part No.FH250BB
€30.55
Each
units
- - - - Yes - - - - - -
RS Stock No. 123-5777
Mfr. Part No.FHH10
€22.59
Each
units
- - - - Yes - - - - - -
RS Stock No. 169-4641
Mfr. Part No.CSA-POD24
BrandHoyles
€203.80
Each
units
- - - - - - - - - - -
RS Stock No. 183-7305
Mfr. Part No.670MBX
BrandBRK
€13.40
Each
units
- Smoke Detector 85dB - Yes Yes - - 133mm 38 mm 230V ac
RS Stock No. 169-4639
Mfr. Part No.CSA-FSU24
BrandHoyles
€305.67
Each
units
- - - - - - - - - - -
RS Stock No. 183-7306
Mfr. Part No.770MRL
BrandBRK
€47.07
Each
units
- Smoke Detector 85dB - Yes Yes - - 133mm 38 mm 230V ac
RS Stock No. 169-4643
Mfr. Part No.CSA-FDW24
BrandHoyles
€522.86
Each
units
- - - - - - - - - - -
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