×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Location of Level Sensor

Location of Level Sensor

Location of Level Sensor

(OP)
We have an application with an existing vertical, round tank, with dish bottom.

4" diameter outlet nozzle about 4" long( located at center of bottom dish).

The 4" piping connected to the outlet drops about 6" and turns 90 degrees and runs along the floor about 20 ft to pump.

I'd like to install an existing 4" flanged DP transmitter in the 4" pipe to determine level in the tank.  We're not concerned with knowing level during emptying or filling the tank.  We are only concerned with level when level is static.

How far away from the bottom of the tank in the 4" line can I install the sensor and still read level?

Does it have to be directly at the 90 degree elbow or can it be any distance away from the bottom tank nozzle along the 4" pipe?

______________________________________________________________________________
This is normally the space where people post something insightful.

RE: Location of Level Sensor

As long as you're only concerned at no-flow conditions, you can be anywhere below the tank, even 20 feet away.

You just have to be sure to account for the difference in elevation between your transmitter and the bottom of the tank (subtract it out).

During flow through the pipe, you'll have a pressure drop -- but if your velocity is low enough, it might be a small enough pressure drop to still get accurate readings.

Good on ya,

Goober Dave

RE: Location of Level Sensor

I'm with Dave,
                        The closer you get it to the tank the less effect flow will have on the reading. You could easily guesstimate the flow effect by looking up a pipe pressure drop table.
Roy

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources