In a message dated 12/11/2009, mark.robinson@............... writes:

ChrisAtUpw@....... wrote:
> In a message dated 11/11/2000,  gmvoeth@........... writes:
>     If the MEMS were 1000  times more sensitive
>     then that means 2G+/- becomes  0.002G+/-

> Hi Geoff,
>     The good news  is that HP don't make them.
>     See  http://www.colibrys.com/e/page/140/

Are my calculations indicating a  noise level of 1 milli-gravity at a 
period of 
10,000,000 seconds correct  ?

Hi Mark,
 
    Don't think so.
 
    The normal  MEMS accelerometer devices have a  dynamic range of about 
93 dB Max, often less. The range has been  extended in the newer devices to 
over 120 dB. They still remain basic  strong motion accelerometers from +/- 3 
g downwards. My interpretation the the  company has at last learned to good 
senors

Dare I  wonder how much these things cost ?
    I suggest that you simply ask.
 
    Regards,
 
    Chrid Chapman





In a message dated 12/11/2009, mark.robinson@............... writes:<=
/DIV>
ChrisAtUpw@....... wrote:
> In a message dated 11/11/=
2000,=20
  gmvoeth@........... writes:
>     If the MEMS were=
 1000=20
  times more sensitive
>     then that means 2G+/- be=
comes=20
  0.002G+/-
 
> Hi Geoff,
>     The goo=
d news=20
  is that HP don't make them.
>     See=20
  http://www.colibrys.com/e/page/140/

Are my calculations indicatin=
g a=20
  noise level of 1 milli-gravity at a period of 
10,000,000 seconds cor=
rect=20
  ?

Hi Mark,
 
    Don't think so.
 
    The normal  MEMS accelerometer devices=
 have a=20
dynamic range of about 93 dB Max, often less. The range has been=20
extended in the newer devices to over 120 dB. They still remain basic=
=20
strong motion accelerometers from +/- 3 g downwards. My interpretation the=
 the=20
company has at last learned to good senors
Dare I=20
  wonder how much these things cost ?
    I suggest that you simply ask.
 
    Regards,
 
    Chrid Chapman