Particle moisture determination apparatus

An apparatus for determining the moisture content of particles delivered to, and/or discharged from, a particle dryer. The apparatus comprising a pneumatic particle extraction means 240 for conveying a quantity of particles to a sensor 300 arranged to determine the moisture content of the quantity of particles. The apparatus further comprising a pneumatic particle return means 290 for conveying the quantity of particles to the particle dryer after it has had its moisture content determined. The first and second pneumatic extraction means may comprise a pipe or conduit and respective first 210 and second pneumatic means such as an air pump arranged to create a partial vacuum at a first end of pneumatic extraction means. The apparatus may further comprise a cyclone separator 220 to separate air from the quantity of particles. The moisture sensor may be a near-infrared sensor. The flow of particulate matter such as grain through the apparatus may be controlled by valves 330 and 305.