 (Click image for a larger view) | For the rotorcraft pilot, the rotor tachometer is a valuable aid to safe flight. Westach rotor tachometers utilize a stateof- the-art Hall-effect sensor to accurately gauge rotor RPM based on the rotational positions of a series of magnets which are easily mounted on the rotor shaft or hub. Standard range is 0-500 rpm, other ranges available by special order. Sensor and magnets are supplied with the gauge along with complete assembly instructions. 12 volt DC power required. Square style, 2 1/4 inch. |