what is the principle of ultrasonic flowmwter and radar type flowmeter?

4 Answers  

---

how radio frequency level probes works with its controller ? what is its principle ? pls give me brief explanation?

0 Answers  

---

In a ball valve which require 24v dc supply to operate, whose solenoid valve doesn't have any + or - indication, how can we make wiring connectionto solenoid valve?

1 Answers   Process Control Technologies,

---

tell me the temp range of rtd?

8 Answers  

---

what should be the attitude while answering an interviewer?

2 Answers  

---

---

on interface level transmitter model(RTG3302-EMERSON) What is threshold valve how can we select correct threshold value T1,T2,T3,T4 When interface water & hydro carbon

0 Answers  

---

what is ment by PID controllers? explain with example?

2 Answers  

---

how can we tune a PID. If it is by zeiger nichols method..please explain briefly with help of an example.

0 Answers   KNPC,

---

what is meaning of static pressure

4 Answers   Ambuja,

---

difference between plc and dcs?

3 Answers   Honeywell,

---

What is the use of double seated valve?

0 Answers  

---

the pump holds on run indication into the dcs and filed local control panel remote push button condition operaton wrong like when the push button pushing conditions the pump is off and the push button release condition the pump is on totally opposite condition . And control room inside give the stop command into dcs just 1secon relay engage and again normal condition. How can I slove

0 Answers  

---