In-situ calibration validation is one of the great benefits of thermal mass flow technology. This video reviews in-situ calibration validation and details how the DrySense sensor stability found in Sierra thermal flow meters is the only way a calibration validation is actually Valid.
When evaluating thermal mass flow meters for in-situ calibration validation capability, be aware that sensor drift will create false-positives that reduce the reliability of the validation. The assumption by all manufacturers, including Sierra, is that their sensor does not drift. Only with sensor stability can users truly validate a thermal mass flow sensor's factory-calibrated accuracy in the field. Ensure that your thermal mass flow meter has a drift-free, dry sensor, which has no organics and cements that drift over time.
Read a detailed in-situ calibration validation whitepaper building on this video by reviewing five in-situ calibration validation approaches and showing how each method has varying cost and complexity.