Answer / sandeep tripathi

c=s/d where s= surface area , d=distance between core &
magnetic field
when level is high then DP is low and when level is low
then DP is high

Answer / ramanathan

C=€A/D
Here € is relative permittivity of the material we going to measure
A- area of the probe
D- distance between the probe
here A and D are constant , so change in permittivity is directly proportional to level

Answer / nitin ku.sharma

since C=ka/d,here we can't change the area(a) so we are changing (d)the distance between them in order to change the capacitance of the capacitor,thus results in change in voltage and in case of transmitter we get change in currentdue to change in capacitance.

CAN YOU USE MOVING COIL METER FOR MEASURING A.C?

2 Answers   DVC,

---

how can calibrate pressure transmeeter in the feild ?

1 Answers  

---

What does a fire detector detects?

4 Answers   GAIL,

---

How to connect PLC to DCS ?

2 Answers   Alkyl Amines,

---

what does a positioner in control valve ?

11 Answers  

---

what will be the output of the temparature transmitter if temp is 120 degre celcius.

1 Answers   Base Automation, NTPC, PDO,

---

Identify and use the ANSI/ISA-S5.1 consensus industrial standard process symbols.

0 Answers   GAIL, Olympia,

---

What is the difference between ROM & RAM .

1 Answers   Sabic, SPIC,

---

hay friends, i am in trouble to understand PID controller. several times i have study but it is not clear to me have you a simple way to understand.

1 Answers  

---

What should be the main consideration while starting the Rotating compressor when we dont know the cut in and the cut off pressure setting of the pressure switch

0 Answers  

---

Differentiate between PLC, SCADA and DCS systems

1 Answers   Mumias Sugar, SRF, Trimula Industries,

---

Sir, I am working as a Instrument Engineer in Grasim Industries. Can any body provide question answer for interview purpose

0 Answers   Grasim,

---