Manometers aid in rice testing applications. The mercury manometer has a sliding scale graduated above and below zero to 130mm x 1mm. The U-tube mounts on a wooden stand and comes complete with mercury. The digital manometer is a precise measurement device designed to replace mercury manometers used in rice test applications. Holes featured on the device provide for bench or wall mounting. As well as a 1/4″ barb fitting that works for quick connections. The instrument features a digital display range of 0 to 1000mm Hg (absolute) at a resolution of 0.1mm Hg. The device has a rated accuracy of +/-0.5% full scale and is powered by one 9V battery.