John, looking at the 2804 manual they clearly only show applications where the probe is in a liquid environment. Reliable results can be expected if the probe is in a gas environment and has the time to stabilize but even than the full accuracy is not attainable because of the conductivity of the cable. The best result is with a physically very small sensor and than transfer the reading to the 2804 A by doing a calibration. I have used a YSI instrument with an analog scale and a analog output into a DVM but do not ask me if I was with in .1 degrees but it was not necessary. Some of the YSI probes have cables that are definitely there to reduce thermal conductivity to the sensor. Bert in Miami **************Know Your Numbers: Get tips and tools to help you improve your credit score. (http://www.walletpop.com/credit/credit-reports?ncid=emlcntuswall00000002) _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
