What are the units of measure for a Jet Fill tensiometer?
A “bar” is the unit of pressure that has been adopted for the expression of soil suction. The bar is an international unit of pressure, either positive or negative, in the metric system. A bar is equivalent to 14.5 PSI or 0.897 atmospheres. It is also equivalent to the pressure exerted by a height of 750 millimeters of mercury of the height of 1,020 cm of water or the height of 33.5 ft. of water. Scientifically it is defined as 106 dynes/cm2. Tensiometer measurements are always less than 1 bar and for convenience the tensiometer scale has been divided into 100 divisions so that each division is 1/100 of a bar or “1 centibar”. This is usually abbreviated as 1 cb. 1 centibar is also equal to 1 kPa (kilopascal). The full dial gauge reading on our Jet Fill tensiometer is 100 centibars of negative pressure or vacuum.
