This is a full-size three cup anemometer. Weight adjustment on each arm for perfect balance. Output is a magnetic switch closure. PVC parts are precision drilled and tapped. With CNC machined aluminum spacer, stainless steel hardware and ball bearing, custom molded lead counterweight, and rugged heavy gauge PVC body, this instrument is built to withstand the elements.
All components come precision drilled.
A capacitive element changes in value in response to the relative humidity of the air. This capacitance is translated into a digital frequency by an integrated circuit timer. The timer and temperature sensor are sealed in hot-melt adhesive lined heat shrink. Output is a current, rather than a voltage, allowing almost any length of wire to connect the sensor to the Observer meteorological station. The sensor is sealed in a moisture-tight adhesive lined heat shrink tube for long life.