PSN-L Email List Message
Subject: Re: LD701 sensor for Lehman
From: ChrisAtUpw@.......
Date: Mon, 14 Aug 2006 21:44:19 EDT
In a message dated 14/08/06, mike8s2@......... writes:
> I saw a Lehman which used this as the sensor - what do you guys think
> (sensitivity, bandwidth, noise floor, etc.):
>
> http://www.omega.com/pptst/LD701.html
Hi Mike,
You tell us the noise floor, the bandwidth etc and we can maybe give a
realistic answer. The 10 micron repeatability does not sound exciting when
you want to measure at least down to 0.1 micron. At $165, I am not going to buy
one to find out.
I suspect that the bandwidth is likely to be too high allowing extra
noise.
Is there any attractive effect due to energisation of the sensor?
I would like to see some more figures and a direct comparison, please.
The commercial LVDTs that I have used are only OK if you make very low
noise electronics to go with them.
Regards,
Chris Chapman
In a me=
ssage dated 14/08/06, mike8s2@......... writes:
I saw a Lehman which used this=20=
as the sensor - what do you guys think (sensitivity, bandwidth, noise floor,=
etc.):
http://www.omega.com/pptst/LD701.html
Hi Mike,
You tell us the noise floor, the bandwi=
dth etc and we can maybe give a realistic answer. The 10 micron repeatabilit=
y does not sound exciting when you want to measure at least down to 0.1 micr=
on. At $165, I am not going to buy one to find out.
I suspect that the bandwidth is likely=20=
to be too high allowing extra noise.
Is there any attractive effect due to e=
nergisation of the sensor?
I would like to see some more figures a=
nd a direct comparison, please.
The commercial LVDTs that I have used a=
re only OK if you make very low noise electronics to go with them.
Regards,
Chris Chapman
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