Answer / aissa

why we use sensing type(NPN)on a vibration monitring
system not a (PNP)sensing type
ANSWER
it's a matter of THE COST since NPN technology is less than PNP

What are difference between automatic and manual control system?

5 Answers  

---

what is three element loop

7 Answers  

---

what is use of communication wire in multipare cable(oil and gas field), why this communication wire not used in single pair cable?

0 Answers  

---

can we use a control valve without positioner

19 Answers  

---

An equipment is certified for EEX, IA, IIC, T6, what do you under stand by this.

3 Answers   ADMA OPCO,

---

What are the uses of orifice plates?

0 Answers  

---

what is difference between accelerometer vibration sensor and proximity vibration sensor

3 Answers  

---

what is puling in n pulling out in flame scanner system?

1 Answers  

---

How to measure the vibration..?

1 Answers   Madhucon,

---

in differential pressure transmitter,min&max pressure range for hp&lp

0 Answers  

---

How to calculate mmwc values into tonnes?

0 Answers  

---

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,

---