What is the difference between fire detector and smoke
detector?

Answer Posted / srinivasansureshkumar

Fire: Fire is a phenoena of chemical process which occurs
when a fuel(source) gets ignited by heat(Motivator) and
cotinues in presence oxygen(sustainer).

** when a fire occurs the resultant products are smoke,
heat and light.

Smoke detectors: Smoke detectors detects the presence of
smoke and initiates an change in circuit to trigger an
alarm/smoke presence.
There are basically two main types of smoke detector used
for smoke detection they are (a) Ionisation type and (b)
Optic type(poto electric).

Fire Detectors: Detects the presence of Light, They come in
varieties in sensing elements such as LDR, Poto diode, etc..
When comes to the area of hydrocarbon fires, these fuels
have an tendency to emit ultraviolet(UV) and Infrared (IR)
light frequency wave lengths. so where UV, ir, UV/ir
detectors are used.

In Breif: Fire Detector detects the light and Smoke
detectors detcts the presence of smoke.

Is This Answer Correct ?    18 Yes 3 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What is motion balance principle?

713


WHY THE DEGREE OF VALVE PLUG AND VALVE SEAT IS SLIGTLY DIFFERENT I CONTROL VALVE TRIM DESIGN

1552


Hi i m B.E. In elect. & comm. I m workin in bio mass plant from 6 mnths as inst. Engg. but now i m in dept. Of operation as shift engg...which is best operation or inst. 4 me? M confusd..plz help and reply me..

3302


Why boiler chimney area  oxyden sensor fixing? 

2050


Using your own examples solve a problem involving normal table. (experimental method and analysis)

686






how to calibrate corollaries (Mass flow meter)?

1653


Positioner usage.

1502


What is stripper & spilitter ? Diffrence in this.?

2069


What is standard of DCS panel design?and what is step of DCS panel design?wiring and type of connector(screw or DB connector)

1723


can anyone tell me about the basic concepts to consider before to start a PLC panel wiring

1510


In power plant to measure vibration of a turbine we install sensors. Before install this sensor we have to set gap voltage. What is meant by gap voltage and its use?

1621


What are the type of bonnets in the control valves?

1428


if my flow is 20000 m3/h than which range of DPT i have to use????

1301


What is the use of GMV in turbine?

3740


What is the difference between ff transmitter and non ff transmitter

1981