In addition to measuring and computing wind speed and direction, the Watchdog Sprayer Station from Spectrum Technologies measures air temperature, humidity, dew point, wind chill and barometric pressure. Smaller than the size of a soda can, the sensor has a magnetic mount for easy installation. The full system includes a display console with built-in data logger, software and cable with vehicle power and serial connectors. Raven’s Viper Pro monitor also can display weather data from the sensor. The sensor and console package retails for $2,095. It is available at

Topcon’s X20 weather station has similar capabilities, plus audible alerts for out-of-range conditions and the ability to record weather conditions within coverage maps. Available only for use with the X20 (System 200) console, it retails for $2,405. For details, visit

New Mountain Innovations markets a system similar to the Watchdog. The NM150 Ultrasonic Weather Station with GPS retails for $1,899 with a 4-in. vehicle-mounted monitor and 12v interface. It is available at