I have used them in thousands (18B20-PAR TO 92 and 18B20 uSOP). I think we =
have =

passed 100K devices by now.

I use them to measure temperature in grain storage bins. I use up to 48 in =
one =

sensor line (up to 100 meter long but normally between 10 and 30 meters) an=
d =

DS2409's to connect up to 16 sensor lines to one input. Wire lengths is tes=
ted =

up to 400 meters.

I can't say that we have had any failures on the sensor itself that I know =
of.

There are some early devices that can loose the internal EEPROM (and =

calibration?) on power up, but the serial numbers and datecodes for them is =

well known and can be checked.

The reset value the sensor has when no conversion command has been issued i=
s =

85C. You will get this value if the power to the sensor is lost during the =

conversion time and then comes back again. This can be a problem if the sen=
sor =

can go offline and you normally expect temperatures in this area.

/Ruben

> Anybody using a 1-wire thermometer? Results OK?
> Need 0C to 80C. Does anybody make except Maxim?
> =

> --Bob Axtell
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D
Ruben J=F6nsson
AB Liros Electronic
Box 9124, 200 39 Malm=F6, Sweden
TEL INT +46 40142078
FAX INT +46 40947388
ruben@pp.sbbs.se
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D
-- =

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