Buy Irrometer 1. 48, Model . It provides the user with accurate information on soil moisture status regardless of soil type. The instrument measures in centibars (cb) or kilopascals (k. Pa) of soil water tension. This value represents the energy a plant's root system uses to draw water from the soil. Understanding soil moisture activity helps the user make informed irrigation scheduling decisions resulting in improved yield and quality while reducing water, fertilizer, labor and energy costs. Calafrica SA, Calafrica-sa, suppliers of Irrometers, Tensiometers. Irrometer 218-AAS - Model 'SR' 18. The IRROMETER operates on the tensiometer principle. IRROMETERS can be used for manual measurement and tracking of soil moisture status for most soil types. Irrometer 148 - Model 'R' 48. The IRROMETER operates on the tensiometer principle. IRROMETERS can be used for manual measurement and tracking of soil moisture status for most soil types. Irrometer Tensiometers $62.00. Manual/Brochure Library; Videos; Industry Articles. Includes. Reservoir. Air- free gauge chamber. Features. Fixed ceramic tip (white) Air- free gauge gives accurate readings Large reservoir makes maintenance easy Operating Principle. The IRROMETER operates on the tensiometer principle, which measures soil water tension. Soil water tension is the energy (vacuum) applied to soil by the plant as it draws in water for nutrition. This force is measured in centibars (cb) or kilopascals (k. Pa) of tension with a high reading indicating the dry end of the scale and a low reading indicating the wet end of the scale. Manual and automatic tensiometers for surface tension measurement using duNouy ring or Wilhelmy Plate Methods. Precision and interfacial surface tension. How do Tensiometers Work? A tensiometer is a hollow plastic tube with a porous ceramic tip at one end. The IRROMETER instrument consists of a sealed, fluid filled tube that is equipped with a porous ceramic tip and a special vacuum gauge. They are installed in the ground with the tips placed at desired root zone depths. As the soil dries (increasing tension), fluid is drawn out of the instrument. This reduces the fluid volume in the IRROMETER, thus creating a partial vacuum which is registered on the gauge. The drier the soil, the higher the gauge reading. An irrigation application or rainfall event reverses this action. As water flows back into the soil (and the IRROMETER), tension is relieved in the soil and the instrument, resulting in a lower gauge reading (lower tension). Irrometer Tensiometer Manual TransferIn effect, the instrument is indicating how hard the roots are working. Due to the IRROMETER's unique principle of operation, no calibrations are necessary under normal operating conditions for different soil types. A gauge reading of 5. Pa) indicates that the roots are extracting the same amount of moisture whether the crop is planted in sandy soil or clay soil. Applications. IRROMETERS can be used for manual measurement and tracking of soil moisture status for most soil types. When equipped with optional electronic output and data logging equipment, measurement and tracking can be done automatically. The standard vacuum gauge on this model can be replaced with electronic measurement options, or automatic switching devices which can activate peripheral equipment at desired soil water tension levels. See the “Automation and Output Options” specifications for more details. The Model R uses a fixed tip and is designed for general use with row, tree and field crops. Specification Information. The irrigation system shall incorporate soil moisture indicators to aid in making irrigation scheduling decisions. The soil moisture indicator shall operate on the tensiometer principle and indicate soil water tension, displaying in units of centibars (cb) or kilopascals (k. Pa). It shall have a hermetically sealed gauge that remains full of fluid even if the instrument tube is completely drained. Tube shall be constructed of durable plastic that is impervious to attack by soil chemicals, with a ceramic sensing tip that is fixed in place. It shall include a fluid reservoir with a submerged valve, whereby fluid can be drained into the tube by turning the cap. All ceramic to plastic connections shall be guaranteed leak proof. The soil moisture indicator shall be an IRROMETER Model R as manufactured by the IRROMETER Company, Inc.
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