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brijeshsac
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Join Date: Feb 2006
Posts: 3

4-20 mA Output

08/01/2009 7:21 PM

sir,

why sensor ' s have only 4-20 mA Output ?
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JohnDG
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Join Date: May 2006
Location: Reading, Berkshire, UK. Going under cover.
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#1

Re: Brijesh Sharma,vibration technician

08/01/2009 8:07 PM

Read this thread. Post again here if you haven't found an answer.

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Anonymous Poster
#2

Re: 4-20 mA Output

08/08/2009 11:21 AM

i can tell u two different answers for this question..

1) all controller have an internal resistance of 250 ohms, which accepts voltage of 1 to 5 v, so correspondingly 4ma converts into 1v and 20ma converts into 5v.

2) 4 to 20 ma signals are considered to be linear with 3 to 15 psi out...
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aman_2580
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Join Date: Aug 2009
Posts: 16
#3

Re: 4-20 mA Output

08/17/2009 11:39 AM

I hope you have read the link given in above post. Actually 4-20ma is a standard signal system and Tranmitters/Transducers have this type of current output, not sensors. Sensors have their own type of output depending of the type of sensor.
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