TruckWeight Smart Scale is a wireless onboard scale for trucks and tractors with air suspensions. Sensors measure temperature and pressure changes in the suspensions and relay data to a handheld receiver via low-powered radio transmitter, and can be monitored from up to 500 feet. Installation takes 30 minutes for a standard five-axle setup. The unit is powered by AA batteries and housed in a shock-resistant, noncorrosive, waterproof container. The scale monitors 20 times per minute to determine if the truck is being loaded, then enters quick-response mode for up-to-the second weights during loading. Estimated price is $1,590 for a five-axle tractor-trailer, which includes two sensors and one receiver.