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Joseph
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 Posted: Fri Jun 13, 2008 4:31 am Post subject: chemical inside old pressure sensor? |
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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)
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| Posted: Fri Jun 13, 2008 6:04 pm Post subject: Re: chemical inside old pressure sensor? |
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Dear Joseph:
"Joseph" <spmok2@canada.com> wrote in message
news:88e844ce-70d1-4ec4-b15f-3cea3824d97a@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
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| Posted: Fri Jun 13, 2008 6:08 pm Post subject: Re: chemical inside old pressure sensor? |
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"N:dlzc D:aol T:com (dlzc)" <dlzc1@cox.net> wrote in message
news:6fu4k.468$sM4.238@newsfe17.phx...
| Quote: |
Dear Joseph:
"Joseph" <spmok2@canada.com> wrote in message
news:88e844ce-70d1-4ec4-b15f-3cea3824d97a@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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