A smoke detector is a device that detects smoke, typically as an indicator of fire.
 

Commercial, industrial and mass residential devices issue a signal to a fire alarm system, while household detectors, known as smoke alarms, generally issue a local audible and/or visual alarm from the detector itself.
Smoke detectors are typically housed in a disc shaped plastic enclosure about 6” (150mm) in diameter and 1” (25mm) thick but the shape can vary by manufacturer or product line.
Most smoke detectors work either by optical detection (photoelectric) or by physical (ionisation) process, while others use both detection methods to increase sensitivity to smoke.
Sensitive alarms can be used to detect, and thus deter, smoking in areas where it is banned such as toilets, schools, airplanes and pubs and restaurants.
Smoke detectors in large commercial, industrial and residential buildings are usually fired powered only by a single disposable battery.
An optical detector is a light sensor.  When used as a smoke detector, it includes a light source, a lens to collimate the light into a beam, and a photodiode or other photoelectric sensor at an angle to the beam as a light detector. 
In the absence of smoke, the light passes in front of the detector in a straight line.  When smoke particles, directing it at the sensor and thus triggering the alarm.
Also seen in large room, such as gyms or an auditorium, are devices that detect a projected beam.  A wall mounted unit sends out a beam which is either received by a separate monitoring device or reflected back via a mirror.  When the beam becomes less visible to the “eye” of the sensor, it sends an alarm signal to the fire alarm control panel.
A photoelectric smoke detection device is generally more responsive to fires that begin with a long period of smouldering.  Photoelectric alarms react slower to rapidly growing fires than ionisation alarms, but lab and field test have shown that photoelectric smoke alarms provide adequate warning for all types of fires and have been shown to be far less likely to be deactivated by occupants.
 
 

ESP Smoke & Heat Detectors

 

The ESP Fireline's smooth aesthetics and competitive pricing will make them more than suitable for the majority of conventional installations.

 

 

LEAD Technologies Inc. V1.01

Our Products > Fire & Smoke Alarms > ESP Smoke & Heat Detectors
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Fireline Combined Smoke & Heat Detector & Diode Base

The ESP Fireline CSD-2 combined smoke and heat detector with diode base is a conventional detector [more...]

Product #: CSD2

£18.54 £22.25 trade price

£11.52 ex VAT

£13.82 inc VAT

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Combined Optical Smoke & Fixed Heat Detector 12V With Relay Base

ESP CSD212 Combined Optical Smoke & Fixed Heat Detector 12V With Relay Base [more...]

Product #: CSD212

£25.75 £30.90 trade price

£16.00 ex VAT

£19.20 inc VAT

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Fireline Fixed Temperature Heat Detector & Diode Base

ESP Fireline FHD-2 fixed temperature heat detector with diode base is a conventional detector [more...]

Product #: FHD2

£10.30 £12.36 trade price

£6.40 ex VAT

£7.68 inc VAT

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Fireline Fixed Temperature Heat Detector 12V With Relay Base

ESP FHD212 Fixed Temperature Heat Detector 12V With Relay Base [more...]

Product #: FHD212

£15.45 £18.54 trade price

£9.60 ex VAT

£11.52 inc VAT

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Fireline Optical Smoke Detector & Diode Base

The ESP Fireline PSD-2 optical smoke detector and diode base is a conventional detector developed to compliment the Fireline Mag fire panels [more...]

Product #: PSD2

£18.54 £22.25 trade price

£11.52 ex VAT

£13.82 inc VAT

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Fireline Optical Smoke Detector 12V With Relay Base

ESP PSD212 Optical Smoke Detector 12V With Relay Base [more...]

Product #: PSD212

£25.75 £30.90 trade price

£16.00 ex VAT

£19.20 inc VAT

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Fireline Rate of Rise Heat Detector & Diode Base

The ESP Fireline RHD-2 rate of rise heat detector with diode base is a conventional detector [more...]

Product #: RHD2

£12.36 £14.83 trade price

£7.68 ex VAT

£9.22 inc VAT

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Fireline Rate Of Rise Heat Detector 12V With Relay Base

ESP RHD212 Rate Of Rise Heat Detector 12V With Relay Base [more...]

Product #: RHD212

£15.45 £18.54 trade price

£9.60 ex VAT

£11.52 inc VAT

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Fireline Deep Base For PSD2, CSD2, PSD212 & CSD212

ESP SD-DB Fireline Deep Base For PSD2, CSD2, PSD212 & CSD212 [more...]

Product #: SD-DB

£5.15 £6.18 trade price

£3.20 ex VAT

£3.84 inc VAT

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