At 10:04 PM 3/21/05, you wrote:

>>MCP9800/1/2/3 2-Wire High-Accuracy Temperature Sensor
>>
>>- =B10.5=B0C (typ.) at +25=B0C
>>- =B11=B0C (max.) from -10=B0C to +85=B0C
>I dunno.  1 degree C doesn't seem very accurate to me.  I mean, one
>degree F (5/9 degree C) makes a difference between "comfortable"
>and "too cold" in my home temperature...
>
>(Does anyone make a sensor specifically aimed at human-range
>temperatures, say 0.1 degree C over the range 10 to 30 C?)


I haven't seen one with those specs, but my students are using a=20
Maxim  DS1626 in their ROV and they tout a 0.5 degree C from 0 to 70C and=
=20
overall operation from -55C to +125C.   The ROV spent four hours in the=20
tropical reef on Saturday at the Aquarium of the Pacific in Long=20
Beach.  The reef is kept at 78F degrees and alarms go off if it gets to 7=
7F=20
or 79F.  The ROV was reading 25.5C (77.9F) all day.  They have the sensor=
=20
set for 11 bits and about a 375mS conversion time.  They have an identica=
l=20
sensor on the processor board to monitor the inside temps of the control=20
box.  Worst case there was 93F.

Very easy sensor to interface with. We did the ICE calibration and also=20
various temps up to 70C and were always within 0.25 of the centigrade=20
thermometer.

Scott


--=20
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