Answer / prasanna

RTD:
RTD means resistive temperature device that made out of a
metal like Platinum (Eg: Pt100 sensor). Resistance of the
metal is linearly proportional to the temperature over wide
temperature range so that temperature can be determined
from the resistance;

Thermocouple:
Thermocouple is a junction made out of two different
metals. There will be an emf generated which is related to
temperature of the junction. This phenomenon is called
Seebeck effect.
Precisely speaking, the emf will be related to temperature
different between thermocouple junction and measuring
point, which is called cold junction.

Answer / kranti1986

RTDs are manufactured from metals whose resistance
increases with temperature.
Within a limited temperature range, this resistivity
increases linearly with temperature.

A thermocouple is a junction between two different metals
that produces a voltage related to a temperature difference.

Answer / yugesh shah

Thermocouple principle : working principle depends on Thermo Electric Effect

RTD principle : resistance varies with temperature

Answer / kumaran

Rtd : Resistance varied with temperature

Thermocouple: See beck effect, when two dissimilar material joined at their ends, between the two junctions the emf is produced

Answer / pankaj sonawane

RTD:-Its semiconductor device whose resistance changes with
change in temperature.


T/c:- When 5the two dissimilar metal soldered or welded at
junction & form an EMF between that juction called as t/c.

how to calculate the total flow in square root

0 Answers   PTI, Qatar Kentz,

---

Why we use mmwc unit for pressure

3 Answers  

---

I have one problem for masoneilan displacer type LT.I give some imformation in data shéet given for liquid level range 0 to 600 mm and sg .955 problem is 0% is ok 25%(23%) or 50%(48%)and 75%(73%) and 100% is ok this is up value and down value all ok so please halpe me

2 Answers   Hyundai, TATA,

---

What care will you take in the installation of control valves,SCADA,DCS and FOC in Oil and Gas Project?

0 Answers   KNPC,

---

How does a redundant controller comes in line when the main controller fails??

3 Answers   Yokogawa,

---

---

why we go for pcbs

2 Answers  

---

differentiate different units of pressure like US & UK standards

1 Answers  

---

GIVE BRIEF DESCRIPTION ABOUT "DCS"

2 Answers  

---

what is the formula for calculating milliampere at different pressure points for eg 4-20 ma = 3-15 psi but if i have to check the ma at 4.6 ma?

4 Answers  

---

Can any body give detail about orifice sizing?

5 Answers   Essar,

---

what is the difference between single and double compression cable gland

3 Answers   Petrofac,

---

What is the difference between HMI and SCADA?

2 Answers  

---