A
amorphia
- Jan 1, 1970
- 0
Hi all,
I'd much appreciate any advice on my search for a cheap and simple
pressure sensor. I need to make a device which can measure how hard a
baby is squeezing a tube, around 2cm thick. I figure the best way is to
use a silicon tube, just above atmospheric pressure, and connect it via
a pneumatic tube to a pressure sensor. So what I need is a pressure
sensor that does not have to be accurate in absolute terms, but needs
to be relatively sensitive, so it can measure changes in grip strength.
I reckon if it went up to 1000 kPa that would be more than enough.
Preferably it would come with an integrated USB interface and drivers
which provided an API. Alternatively, if you know a good one but it
just outputs a voltage, perhaps you could also recommend a good cheap
and cheerful USB A to D converter?
So far the best thing I've found is this, which you can combine with
a USB interface from the same supplier:
http://store.pasco.com/pascostore/showdetl.cfm?&DID=9&Product_ID=51374&Detail=1
But I think it will only interface using their proprietary software -
it's for classroom use, after all. But this gives you a basic idea of
what I'm after.
Other solutions to the basic problem also gratefully received!
Cheers,
Ben
I'd much appreciate any advice on my search for a cheap and simple
pressure sensor. I need to make a device which can measure how hard a
baby is squeezing a tube, around 2cm thick. I figure the best way is to
use a silicon tube, just above atmospheric pressure, and connect it via
a pneumatic tube to a pressure sensor. So what I need is a pressure
sensor that does not have to be accurate in absolute terms, but needs
to be relatively sensitive, so it can measure changes in grip strength.
I reckon if it went up to 1000 kPa that would be more than enough.
Preferably it would come with an integrated USB interface and drivers
which provided an API. Alternatively, if you know a good one but it
just outputs a voltage, perhaps you could also recommend a good cheap
and cheerful USB A to D converter?
So far the best thing I've found is this, which you can combine with
a USB interface from the same supplier:
http://store.pasco.com/pascostore/showdetl.cfm?&DID=9&Product_ID=51374&Detail=1
But I think it will only interface using their proprietary software -
it's for classroom use, after all. But this gives you a basic idea of
what I'm after.
Other solutions to the basic problem also gratefully received!
Cheers,
Ben