1,why we use 4-20 ma output of all instrument qhy not use 0- 20, 2,what is the different between PLC & DCS. 3,how can we meaure maximum span of new flowmeter if not given any information.

4 Answers   Reliance,

---

Why in turbine used two critical speed band ?

1 Answers   Ankit Metal Power,

---

Draw a wheatstone bridge circuit showing supply, meter and 3 wire RTD connection

0 Answers   CCIE,

---

if a tank is contaning oil and water than how can we measure the oil and water level seperately

3 Answers  

---

how u meassure room temp?is it possible 2 meassure room temp by rtd or thermocouple?between rtd n thrmocouple which is more regard?3 meassure diff. between rtd n thermocouple?

3 Answers  

---

Difference between guide wave radar & non guide wave radar ?

1 Answers   UPL,

---

what is the equation for gas flowmetering? whic includes gas flow, pressure, and temperature.

2 Answers  

---

how u calibrate sox nox co2 co in cemps?what is opacity n HPm?tell the standard parameters of cems?

0 Answers  

---

How to fix back the valve actuator stem

0 Answers   SAFCO, Tarpon,

---

What is Process portal A(PPA)?

1 Answers   ABB,

---

my temperature transmitter in field showing 700 degree , whereas in dcs showing 459 degree, how to resolve this?

4 Answers   ONGC,

---

thermocouple output is AC OR DC??

17 Answers  

---