Servomex has released its newest moisture sensor, the field-replaceable AquaExact 1688 (aluminum oxide technology), for measuring ppm H2O or dewpoint. It joins Servomex’s broad class of moisture analyzers (including lasers) that can measure from ppt levels up to ppm levels for industrial gas applications. The AquaExact 1688 is unique in that the sensor can easily be field-replaceable and fully calibrated immediately upon uploading the calibration data locally to the moisture controller rather than having to take the sensor back to a lab (or the manufacturer) for recalibration. Aluminum oxide (Al2O3) sensors work by measuring the capacitance between the aluminum core and a gold film deposited on top of the oxide layer. The capacitance varies with the water vapor content contained in the pores of the oxide layer and is inversely proportional to the distance between the capacitor plates. Servomex’s aluminum oxide sensors have three innovative structural improvements, giving them a strong advantage over traditional Al2O3 sensors and providing industry-leading sensitivity and stability. For more information, click here.