Answer / sanjay

t/c and rtd use for tempreture measurement.

Answer / deepak nayak

A thermocouple consists of two conductors of different
materials (usually metal alloys) that produce a voltage in
the vicinity of the point where the two conductors are in
contact. The voltage produced is dependent on, but not
necessarily proportional to, the difference of temperature
of the junction to other parts of those conductors.
resistance temperature detectors (RTDs), are sensors used to
measure temperature by correlating the resistance of the RTD
element with temperature. Most RTD elements consist of a
length of fine coiled wire wrapped around a ceramic or glass
core. The element is usually quite fragile, so it is often
placed inside a sheathed probe to protect it.The material
has a predictable change in resistance as the temperature
changes; it is this predictable change that is used to
determine temperature.

Answer / sathish

temperature

why use on -off control valve in glove valve

1 Answers  

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Why in turbine used two critical speed band ?

1 Answers   Ankit Metal Power,

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In control valve there are two type of valve seat we can use metal to metal seat & soft seat.On this valve seat i have following doubt. 1)I have never seen practically the internal assembly of valve so my doubt is that basically weather the seat is soft seat or metal its basic MOC is same as valve body(SS or CS) only in soft seat we are using PTFE ring & place on valve seat & in metal this PTFE ring is not threr am i correct??????? 2)what are the common general rule for using metal to metal seat & soft seat,means its depend on process parameter like liquid,gas, steam & on valve leakage class.

1 Answers  

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how to control pid

0 Answers  

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How we will check whether the proximity, which we have is either NPN or PNP, if no data sheet or manual or any details is available to us ???

1 Answers  

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how to tune siemens sipart electro pneumatic positioner..plz tel me..

0 Answers  

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Full form of KKS when use DCS.

0 Answers  

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Positioner usage.

0 Answers   CCIE,

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In turbine, what does term CDP, NI, NH, HSSOC, means

0 Answers   ADMA OPCO,

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-/5A. What is the meaning and limitations of this in energy meter constant. It is a 3 phase LT Energy Meter. If this Energy Meter is connected through a CT of ratio 200/5 Amps, then what is the multiplying constant and how its will be calculated.

0 Answers  

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In instrumentation standard we use 4 to 20ma for transmission , why cant we use 3 to 19ma ?

1 Answers   NSH,

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could someone explain for me what is 32-bit Floating Point ? Thanks

1 Answers  

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