>If anyone has any other suggestions for a variable-voltage-output sensor to
>operate in the room temperature range, I'd appreciate it. Thanks!

There is always the Analog Devices AD590 series, the best calibration spec
is +/-1K, which I think you will find is similar to or better than the NS
devices. This is a current output device, being 1uA/K. It requires a minimum
of 5V across the sensor, and is easily turned into a voltage output device
of 10mV/K using a 10k resistor. At room temperature this then gives you
around 2.9 volts across the resistor.

Being a current type device with only 2 wires makes it easy to use in remote
locations. However it does pay to have a 1nF capacitor across the pins at
the sensor to stop RF and other noise getting into the sensor and upsetting
it.

The data sheet gives some advice on improving the accuracy by checking the
device at a spot temperature, or multiple spots to calibrate it more
closely. I have never bothered to do this, as +/-1K has always been
sufficient for my use. If you really need high accuracy then you probably
need to go to Platinum Resistance type sensors, which are high accuracy and
repeatability between sensors is more easily attainable, but involves
getting involved in 3 or 4 wire sensing systems.

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