Need information on room temperature sensor.

Analog Devices:         AD590

"Kelvin" <kelvin_xq@yahoo.com> wrote in message
news:41733334$1@news.starhub.net.sg...
> What I need is a minituare temperature sensor that can sense the room
> temperature between 10C to 40C, precision of up to 0.1C.
>
> Has anyone seen such information?
>
> Thanks.
>
>
>

On Mon, 18 Oct 2004 11:12:48 +0800, the renowned "Kelvin"
<kelvin_xq@yahoo.com> wrote:

>What I need is a minituare temperature sensor that can sense the room
>temperature between 10C to 40C, precision of up to 0.1C.
>
>Has anyone seen such information?
>
>Thanks.

If you want guaranteed 0.1&#4294967295;C interchangability and accuracy without
calibration, even at a single point, let alone over that range, your
choices are quite limited. A high precision thermistor will just do
it, though with risk of drift.A high precision platinum RTD is the
best solution if you really need that accuracy.  


Best regards, 
Spehro Pefhany
-- 
"it's the network..."                          "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

Kelvin wrote:

> What I need is a minituare temperature sensor that can sense the room
> temperature between 10C to 40C, precision of up to 0.1C.
> 
> Has anyone seen such information?
> 
> Thanks.

Either a thermocouple (probably K type) or a Pt100 sensor. Personnaly I 
feel more confident about the Pt100.

-- 
********************************************************************
Paul E. Bennett ....................<email://peb@a...>
Forth based HIDECS Consultancy .....<http://www.amleth.demon.co.uk/>
Mob: +44 (0)7811-639972 .........NOW AVAILABLE:- HIDECS COURSE......
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Kelvin wrote:

> What I need is a minituare temperature sensor that can sense the room
> temperature between 10C to 40C, precision of up to 0.1C.
> 
> Has anyone seen such information?
> 
> Thanks.

Further to my earlier posting you should contact this company. Where I am 
working at present bought a number of Pt100 sensors that are incredibly 
small, only cost about �13.00 and follow a very dependable 
temperature/resistance curve which is a BS/EN standard. You may find it 
easier to ask Morten himself about these devices as I do not think they are 
represented on his company's web-site. They operate on the basis of "tell 
us what sensors you need we will source them at a competitive price. He has 
helped us out with a number of unusual sensor requirements over the past 
couple of years.

        http://www.sensor-technik.co.uk/

-- 
********************************************************************
Paul E. Bennett ....................<email://peb@a...>
Forth based HIDECS Consultancy .....<http://www.amleth.demon.co.uk/>
Mob: +44 (0)7811-639972 .........NOW AVAILABLE:- HIDECS COURSE......
Tel: +44 (0)1235-811095 .... see http://www.feabhas.com for details.
Going Forth Safely ..... EBA. www.electric-boat-association.org.uk..
********************************************************************

"Endymion Ponsonby-Withermoor III"
<m_a_r_v_i_n@para----and----.want-to-do.coe.ukk> interrupted my
perusal of alt.binaries.erotica.pornstars.80s to say:

>"Kelvin" <kelvin_xq@yahoo.com> wrote in message
>news:41733334$1@news.starhub.net.sg...
>> What I need is a minituare temperature sensor that can sense the room
>> temperature between 10C to 40C, precision of up to 0.1C.
>
>Dallas do a little 8-pin thing, with I2C interface.
>
>There's also a 3-pin LM?35? give a voltage out proportional to temperature.
>  (One variant has an offset to allow -ve temperatures)

The LM75 is a I2C thermostat and thermometer, -128 to 128 &#4294967295;C.
Accuracy is a problem though, +/- 0.5 &#4294967295;C

---
Martin Pot (pot@xs4all.nl)
http://www.xs4all.nl/~pot
 
   Plutonium lasts twenty-five millennia, but arsenic is forever.
            - Terry Pratchett -