what is the basic working principle of I/P and Positioner in any control valve.

12 Answers   Essar, Visa Steel,

---

WHY WE NOT USE 2-20mA,1-20mA,3-20mA or 10-50mA SIGNAL? INSTEAD OF 4-20mA.

6 Answers   Hindustan Unilever Limited, Yashmun Engineers,

---

A RANGE OF TRANSMITTER IS (0-400)B mm abs what is "B"?

1 Answers   HCL,

---

can we change the range of 3151 model level transmitter of rosemount make? present calibration range is 1000mmwc and want to change it to 2000mmwc

4 Answers  

---

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

1 Answers   NSH,

---

Vibration probe working principle?

1 Answers   Tata Steel Limited,

---

What is the difference between fire detector and smoke detector?

5 Answers  

---

how to calibrate an error for pressure transmitter, make it easy to understand

2 Answers   Descon,

---

What is ptw and write 3 types of ptw?

5 Answers   Emco,

---

What is the difference between antisurge

1 Answers  

---

Possible cause of IOP alarm in a DP transmitter: a: IOP-minimum b: IOP-Maximum

4 Answers  

---

what is function of DCS , and how is it work , explain with difination

1 Answers   Bapco Bahrain Petroleum Company,

---