Using techniques described in the Dallas Semiconductor (now Maxim) data sheets, these temperature sensors are capable of 0.25 deg. C accuracy. I currently have one glued (with Arctic Silver thermal epoxy) to the bottom of my water cooled Athlon 1000, one glued to a small piece of copper tubing used to sense the water temperature at the radiator inlet, and one that is in a 5 1/4" drive bay front panel used to sense the ambient temp. A standard 8051 type processor is used to read up to eight of the sensors once a second, and update a serial LCD display also located in the drive bay front panel. Overall accuracy is excellent for temperature monitoring, and OK for serious testing. One thing to remember is that like thermistors, these sensors are not hermatically sealed and should not be in direct contact with water. A coating of water proof (thermal?) epoxy could be used to fix this.
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