Optical Smoke Detector
@ Ksh #
Rating 4.8 | 36 Comments
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Essential Safety Tools for Every Space
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Description:
An optical smoke alarm (also called photo-electric smoke alarm) works using the light scatter principle. The alarm contains a pulsed infrared LED which pulses a beam of light into the sensor chamber every 10 seconds to check for smoke particles.
When a fire breaks out smoke will enter the optical chamber through the opening vents. Smoke alarms from quality manufacturers have the chamber protected with insect screens to stop bugs entering and causing false alarms.
As the smoke enters the optical chamber, its particles cause the infrared light to be scattered onto the photodiode light receptor.
This quick response and early alert gives you more time to escape from your home if a fire breaks out.
Because of their advanced technology, optical smoke alarms are sometimes known as 'toast-proof alarms' as they are not prone to false alarms caused by fumes and steam from cooking.
This makes them suitable for use in a hallway near a kitchen where false alarms from burnt toast may be common.
Specification:
| 1 | Operates on a DC voltage, with common ranges like 12-24V DC or 9-33V DC. However, some models have a wider range, such as 15 to 32Vdc. |
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| 2 | Standby Current: Current drawn when the detector is in a non-alarm state. Typically measured in microamperes (µA), with values like 50 µA or 200 µA |
| 3 | Alarm Current:Current drawn when the detector is in an alarm state. Often measured in milliamperes (mA), with values like 47 mA or 90 mA (max). |
| 4 | Sensitivity: Determines how much smoke is needed to trigger an alarm. Often expressed as %/ft obscuration, with values like (1.96 ± 0.76) % / ft obscuration. |
| 5 | Humidity: The humidity range within which the detector can function correctly. Common ranges include 15% to 95% relative humidity or Max. 95% RH. |
| 6 | Sound Level: The decibel (dB) level of the alarm sound. Common values include 85dB(A) at 3m. |
| 7 | Sound Level: The decibel (dB) level of the alarm sound. Common values include 85dB(A) at 3m. |
| 8 | Sound Level: The decibel (dB) level of the alarm sound. Common values include 85dB(A) at 3m. |
| 9 | Sound Level: The decibel (dB) level of the alarm sound. Common values include 85dB(A) at 3m. |