We are using the diode DT-670-SD to measure the temperature of a copper rod @ LN2 Temperature. Its mostly in vacuum.
Sometimes we do have some nitrogen gas flow over it. At this instance the temperature drops rapidly. I understand convection is at play, however the temperature read by the sensor is higher than the actual temperature of the copper rod.
Is there a way to isolate this sensor so that it reads the substrate temperature more accurately and minimizes the environmental effects? Can I encapsulate the Diode in epoxy?
Post by Lake Shore Jeff M on Jun 26, 2020 7:32:07 GMT -5
Hello Raj, How do you have the SD package attached to the copper rod? The thermal transfer to the sensor is through the bottom of the package so it should be in good thermal contact with the rod. In theory, air flowing over the top of the package should not affect the reading, however, that air can transfer heat into the sensor through the leads if they are not properly anchored to prevent that happening.