Affordable, Portable Water Activity Lightweight - just 4 ounces Pocket-sized - 3.5 x 4 inches Battery-operated Easy two point calibration Self-contained - low maintenance sensor and readout in a single unit Most affordable water activity meter on the market Limitations No temperature control Capacitance sensor limits accuracy to ± 0.02 aw Sturdy and Reliable Originally designed for government inspectors, the 4-inch Pawkit is a reliable water activity instrument for use on-the-go.  How It Works To make a measurement, flip back the sensor cover and fit the Pawkit over a standard AquaLab sample cup. A push of a button brings an accurate reading within five minutes. Pawkit owners include government inspectors, jerky manufacturers, small food companies, and production-line QA managers, among others. The Pawkit is accurate to ± 0.02 aw , so it can only be used where a higher accuracy is not critical.