Evaluation of water activity measurement with a dew point electronic humidity meter
V. Roa, S. T. De Daza · LWT · 1991
A statistical evaluation of a psychrometric electronic device (Decagon CX-1) for measuring water activity was conducted in order to determine its precision, accuracy, calibration, stability of calibration and hysteresis effect of sensor, using a set of saturated salt solutions to span the whole a w range, at 30 and 40 o C. Results indicated that this instrument, when properly operated and calibrated, and providing that measured values are corrected by a calibration curve, constitutes a precise, accurate and remarkably fast means of determining water activity