Compacto
Active Member
- Joined
- Mar 17, 2015
- Messages
- 39
- Reaction score
- 27
Covers size, location in and depth of probe in vessel and a bunch of other stuff.
"A rule of thumb for minimum immersion length
to avoid stem conduction error is 10 times the
probe diameter plus the sensitive length of the
probe.**Most RTDs have a sensitive length of
approximately 1.0.**So for a ¼ diameter RTD the
minimum recommended immersion is 3.5.***
Thermowells require about 4.5 as a minimum
for best accuracy."
"A thermowell/RTD assembly was immersed in a
bath to determine the stem conduction at
various depths.**At 4.5 inches most of the error
has disappeared.**As you can see the error is
mostly independent of the bath temperature
used.**The error is expressed as a percentage of
the delta T between ambient and process
conditions.**"
http://www.burnsengineering.com/loc...hermowell_selection_and_application_notes.pdf
"A rule of thumb for minimum immersion length
to avoid stem conduction error is 10 times the
probe diameter plus the sensitive length of the
probe.**Most RTDs have a sensitive length of
approximately 1.0.**So for a ¼ diameter RTD the
minimum recommended immersion is 3.5.***
Thermowells require about 4.5 as a minimum
for best accuracy."
"A thermowell/RTD assembly was immersed in a
bath to determine the stem conduction at
various depths.**At 4.5 inches most of the error
has disappeared.**As you can see the error is
mostly independent of the bath temperature
used.**The error is expressed as a percentage of
the delta T between ambient and process
conditions.**"
http://www.burnsengineering.com/loc...hermowell_selection_and_application_notes.pdf
