Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
undefined
The values should be close to 465 and 535. If you are getting 408 and 439 then I suspect that you have a poor connection between the +3.3V pin of the Z probe connector and the Vcc pin of the sensor.