Answer / andy

electro-catalytic detectors detects change in resistance
whereas ir-type detectors detects changes in intensity of IR
spectrum and alerts the system whenever they detects a fire

Answer / gautam_etrx.engg

Ultraviolet rays (Earlier it was infrared rays)

Answer / faiyaz

Fire detector detect the fire like UV-ultra violet ray and IR means Infra ray both are fire one is small fire and one is big fire generally used in Hazard area like compressor and condensate area

Answer / saumyajit

in fire detectors normally we use photo resistors,which is used in wheatstone bridge circuit,in photo resistor conductivity changes as light intensity change.or we cud use photo diodes.(PN-diode,PIN-diode,avelanche diode)

If mVolts can drop by resistance of wire as compare to mA, then how thermocouple mV reaches in CCR as accurate value?

7 Answers  

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detail of mass flow meter pricipal

0 Answers  

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What is Cryogenic?

2 Answers  

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NAME ANY TWO PHOTO CONDUTIVE MATERIALS?

1 Answers   DVC,

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Why we use mmwc unit for pressure

3 Answers  

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Type of level transmitter commnly used in Procees area are the following. a.________________This type of level transmitter works as follows

0 Answers  

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what is power factor?

1 Answers  

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what is full form of NAK?

1 Answers  

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in the construction field why hook up s.s.tubing for transmitter using upto 6mtrs of closed loop, but y not open loop nomore restriction

5 Answers   Sabic,

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What is difference between differential pressure & delta pressure?

0 Answers  

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what barrier is used in process industry.

3 Answers   ADMA OPCO, Process Industries,

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What is surge and how is it prevented.

1 Answers   ADMA OPCO,

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