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Dale;
1mT = 10G
1uT = 10mG
1nT = 10uG
nominal earth field = 0.5G = 50uT (normally between 18 and 60uT depending where
you are).
Are you going to see if you can lift the mag parts? Because if you are, I can
tell you that the pins of the chips are made of tinned steel and most
definitely magnetic. If you mean to test the "business end", how will you know
if there is a tiny amount of contamination? I have picked up Roman bronze coins
showing no signs of containing any iron even after 2000 years in the soil, with
my neodymium "Super Mag". So if the object is to do the same exercise, you need
a bit more "umph". (The price of these is c.£99).
Cris.
-----Original Message-----
From: Dale Seppa [mailto:[email protected]]
Sent: Wednesday, June 14, 2000 7:18 AM
To: protonmag @listbot.com
Subject: Magnet selection help needed.
The Proton Mag Forum
I want a good magnet to use for testing that various parts used for
magnetometer construction have no traces of ferro magnetic contamination.
I have an ad for one from American Science and Surplus which reads as follows:
... 2 1/2" diameter x 7/8" thick magnet with a 3 1/4" high "T" handle. It has
a whopping 50 gauss @ 3/4" and picked up 20 pounds of solid bar stock in the
R&D lab. The appearance is a little rough - chromed and black steel but
scuffed, but functionally it can't be beat. US$6.50 + shipping and handling of
US$5.50. (Total US$12.00 postpaid)
I want something good and this sounds as strong as any I REMEMBER seeing but I
really do NOT know what "50 Gauss" is and how it compares with other things
available. Any help appreciated.
Best regards to all,
Dale
[email protected]
103 North Sixth Avenue
Virginia, MN 55792 USA
_____
1mT = 10G
1uT = 10mG
1nT = 10uG
nominal earth field = 0.5G = 50uT (normally between 18 and 60uT depending where
you are).
Are you going to see if you can lift the mag parts? Because if you are, I can
tell you that the pins of the chips are made of tinned steel and most
definitely magnetic. If you mean to test the "business end", how will you know
if there is a tiny amount of contamination? I have picked up Roman bronze coins
showing no signs of containing any iron even after 2000 years in the soil, with
my neodymium "Super Mag". So if the object is to do the same exercise, you need
a bit more "umph". (The price of these is c.£99).
Cris.
-----Original Message-----
From: Dale Seppa [mailto:[email protected]]
Sent: Wednesday, June 14, 2000 7:18 AM
To: protonmag @listbot.com
Subject: Magnet selection help needed.
The Proton Mag Forum
I want a good magnet to use for testing that various parts used for
magnetometer construction have no traces of ferro magnetic contamination.
I have an ad for one from American Science and Surplus which reads as follows:
... 2 1/2" diameter x 7/8" thick magnet with a 3 1/4" high "T" handle. It has
a whopping 50 gauss @ 3/4" and picked up 20 pounds of solid bar stock in the
R&D lab. The appearance is a little rough - chromed and black steel but
scuffed, but functionally it can't be beat. US$6.50 + shipping and handling of
US$5.50. (Total US$12.00 postpaid)
I want something good and this sounds as strong as any I REMEMBER seeing but I
really do NOT know what "50 Gauss" is and how it compares with other things
available. Any help appreciated.
Best regards to all,
Dale
[email protected]
103 North Sixth Avenue
Virginia, MN 55792 USA
_____