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Sensors
Topic: Sensor technologies.
from the Instrumentation department...
Flow meter selection for sludge flow
Originally posted by Dasa on 18 April, 2011 - 2:44 pm
Flow meter selection for sludge flow measurement
New Replies:
I suggest you to use ultrasonic flow meter type with min 2 path sensor....
Topic: Sensor technologies.
from the Forum department...
compensation cable in tc
Originally posted by Charles on 6 February, 2013 - 9:54 am
about compensation cable info reqirements
New Replies:
Thermocouple extension cable is required because it completes the measurement, which is the EMF...
> is it required when transmitter is near to sensor? How near is "near"?...
simply because the various junctions are at unknown temperatures, so it depends on your design and...
Topic: Sensor technologies.
from the EE department...
difference between NPN/PNP Sensors
Originally posted by majid on 8 October, 2006 - 4:57 pm
what is difference?
New Replies:
Hi,. for me to easy remember, Output NPN sensor is Negative (0Volt), and need positive (+24Volt...
well said!! Exactly the way I would have answered! Correct, straightforward to the point....
Topic: PLCs and related questions.
from the Forum department...
Running Stepper motor to Siemens PLC
Originally posted by Delta_V on 5 February, 2012 - 12:57 am
I want to run a stepper motor and use 4 solid state relays instead of a motor driver.
New Replies:
What's the type of SSR? I think you may have mixed up some numbers. I think, that 1,2V is the...
Posted by syurish on 5 February, 2013 - 11:05 am
New issue of IFSA Newsletter, No.1, January 2013
Topic: Sensor technologies.
from the Instrumentation department...
Wrong Thermocouple Extention Cable
Originally posted by Benjamin Pazolli on 29 January, 2013 - 12:24 am
What is the error if you use a Tx cable with a K thermocouple?
New Replies:
> Just how much extension wire that needs to be replaced is involved here? considering this...
Just how much extension wire that needs to be replaced is involved here? A couple hundred feet?...
Thanks CWW for the reply, >The two ends are unlikely to be at the same temperature in the...
Aye, there's the rub. The two ends are unlikely to be at the same temperature in the real world....
ok forum, one more chance :) let's make this whole thing a k type thermocouple. the actual...
oh, my mistake. if all the junctions get to the same temperature, it would just reduce to a t...
I can quite believe it - especially if the guy responsible for the original design is now...
For once I am in complete agreement with Bob, the one thing that you can say for sure is that it...
@ Roger, you are correct but i suppose you have misunderstood me. by treating as a single unit and...
> I cannot believe we are discussing the relative merits of doing something in > various...
Exactly. There's no way that's going to work satisfactorily. You'd have to characterize both of...
I cannot believe we are discussing the relative merits of doing something in various wrong ways as...
Yep - there are two extremes. If the terminals in the thermocouple head are at more or less the...
As far as I know, it is not feasible to treat this as a single system as you suggest, since you...
more or less the same thing that i said in my last post, has already been said by Bruce Durdle in...
the error is minimum, not one you want to make. but for most applications is is just the...
an alternative (might be of help). why bother about individual junctions, you have a...
Oops, I stand corrected. In my earlier post, I was thinking ordinary copper wire was the...
> $$$ > I understand and agree but it would be easier to make a business case if I had...
Exactly. As another poster suggested, either change the extension wire or the thermocouple so they...
The best way to make an estimate of the error is to set up a test system - stick a Type K in a bath...
Type T will have one leg of copper - which is copper-coloured ......
Yes, and you can even measure the temperature and calculate the individual errors. My reasoning...
Tell you customer it's the worst kind of error, unpredictable and variable. regards cww...
With a mismatch you will never get much more than indicator accuracy. There are simply too many...
Here's my rationale on the topic: I don't think the error is a linearity question related to...
> Why not just fix the problem? Either use the right thermocouple or change the cable....
I'm going to suggest the original poster is misreading the information printed on the cable jacket....
Why not just fix the problem? Either use the right thermocouple or change the cable. Thermocouples...
Topic: Sensor technologies.
from the Project Management department...
Displacer type Level Transmitter
Posted by Mohammad Sammo on 4 February, 2013 - 1:19 am
There is a installation issue. Process pipe is falling.
Topic: Sensor technologies.
from the Forum department...
Range of Pressure Transmitter
Originally posted by Gafoor on 30 January, 2013 - 9:06 am
Range of Pressure Transmitters
New Replies:
Everything effects 'accuracy'. Everything like temperature, aging, line pressure, hysteresis. So,...
Topic: Sensor technologies.
from the Forum department...
Thermowell Length for best accuracy
Originally posted by GAFOOR on 11 January, 2013 - 7:31 am
What is the Thermowell immersion length required for best accuracy?
New Replies:
you need to specify what is accurate enough along with the temperature, pressure, and whether of...
Here is new online tool to calculate your thermowell according to ASME ...
Topic: Sensor technologies.
from the Density Measurement department...
Coriolis density measurement
Originally posted by Kirill St. on 3 July, 2012 - 8:53 am
Student project in coriolis density measurement.
New Replies:
The frequency of operation of a coriolis flowmeter depends on the density of the fluid it contains....
Topic: Sensor technologies.
from the Instrument department...
Temperature transmitter for underground tank
Posted by dasau on 31 January, 2013 - 4:40 am
Temperature sensor for underground tank!
Topic: Engineering and workplace issues.
from the control department...
fuel flow in CT
Originally posted by randy on 26 January, 2013 - 11:13 am
CV importance and fine tuning
New Replies:
randy, This is something many people have a very difficult time understanding. They assume that...
Most gas turbines use some kind of speed control, during start-up/acceleration or during loaded...
Topic: Power generation equipment control.
from the Maintenance department...
Wheelspace Temperature GE GT Frame 3
Originally posted by DAMENE Amar on 20 February, 2007 - 10:11 pm
Upgrade Speedtronic Mark II to Mark VI
New Replies:
GT, The next time your machine is open and the rotor has been removed, have a look at how the...
Dear Mr. CSA! First, I am sorry. After CI, the temp. higher is the same side before CI. ...
Topic: Engineering and workplace issues.
from the Wireless department...
Wireless solution for Water level monitoring
Originally posted by elpro energy on 29 January, 2013 - 9:08 am
Looking for a solution to monitor water tanks with wireless connectivity.
New Replies:
By Pietro Tallarico on 29 January, 2013 - 2:20 pm -
You may install the transmitter differential profibus pa (if the tanks are to the atmosphere.) All...
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