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Science Forum Index » Mechanics Forum » chemical inside old pressure sensor?...
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| Joseph... |
 Posted: Thu Jun 12, 2008 6:31 pm |
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I am looking at an old Pressure Sensor with a dial display (shows Psi
& inch hg gauge) on one end and a membrane type transducer on the
other end. On the display there is a label that says "Nr:4" I wonder
if this refers to the chemical inside this sealed sensor assembly.
Does anyone know what "Nr:4" means? Generally what chemical do they
use in these older dial type mechanical pressure sensor? |
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| N:dlzc D:aol T:com (dlzc)... |
| Posted: Fri Jun 13, 2008 8:04 am |
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Guest
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Dear Joseph:
"Joseph" <spmok2 at (no spam) canada.com> wrote in message
news:88e844ce-70d1-4ec4-b15f-3cea3824d97a at (no spam) y38g2000hsy.googlegroups.com...
Quote: I am looking at an old Pressure Sensor with a
dial display (shows Psi & inch hg gauge) on
one end and a membrane type transducer on
the other end. On the display there is a label
that says "Nr:4" I wonder if this refers to the
chemical inside this sealed sensor assembly.
Probably not.
Quote: Does anyone know what "Nr:4" means?
Generally what chemical do they use in these
older dial type mechanical pressure sensor?
Glycerine is pretty common, to dampen mechanical vibrations in
the gauge.
David A. Smith |
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| madcadman... |
| Posted: Fri Jun 13, 2008 8:08 am |
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"N:dlzc D:aol T:com (dlzc)" <dlzc1 at (no spam) cox.net> wrote in message
news:6fu4k.468$sM4.238 at (no spam) newsfe17.phx...
Quote: Dear Joseph:
"Joseph" <spmok2 at (no spam) canada.com> wrote in message
news:88e844ce-70d1-4ec4-b15f-3cea3824d97a at (no spam) y38g2000hsy.googlegroups.com...
I am looking at an old Pressure Sensor with a
dial display (shows Psi & inch hg gauge) on
one end and a membrane type transducer on
the other end. On the display there is a label
that says "Nr:4" I wonder if this refers to the
chemical inside this sealed sensor assembly.
Probably not.
Does anyone know what "Nr:4" means?
Generally what chemical do they use in these
older dial type mechanical pressure sensor?
Glycerine is pretty common, to dampen mechanical vibrations in the gauge.
David A. Smith
Mineral oil is also used. |
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