Answer / vicoy

Wet Contact has line supply voltage either AC or DC
Dry Contact is open and closed continuity

Answer / saravanakumar

wet contact is a contact which is not potential free. But dry contact is a potential free contact and the contact rating can be either 24VDC, 230VAC or 110VAC.

WHAT IS THIS INSTRUMENTATION?

7 Answers  

---

Which softwere is required to communicate the S7-300 processor

4 Answers  

---

why we use 4-20 mA to do calibration of the instruments.why we cant use 0-20 mA?

8 Answers   Emerson, IEM,

---

How is automatic reference junction compensation carried out in temperature recorders?

0 Answers  

---

can u plz send me technical questions asked in SCHNEIDER ELECTRICAL technical paper?

0 Answers   TCS,

---

What is a PID?

6 Answers  

---

any body tell me ,contol valve has how many cheractristic? explain it.

6 Answers   L&T,

---

How oil line flow measured?eplain about instruments used and working principle?

0 Answers  

---

Why ac supply load cell is used? Can we use the dc supply load cell?

0 Answers  

---

How RAL(Rotary air lock)works in cement industry?

0 Answers   Jaypee,

---

I was working on calibrating turbidity transmitters endress+hauser at effluent polishing plant.We calibrated using NTU buffers.What happened is that when we immersed the sensor, everytime we raise and lower the sensor gradually, the reading will vary.my question is that is there any specifications on what is the required distance from the bottom of the container with buffer to the face of the sensor?Is it ok to install the sensor in a medium which has turbulence specially if bubbles are present?

0 Answers  

---

what are the steps to commissioning a DCS system?

2 Answers   BGR Energy,

---