Irrometer Model R 18 Inch (45 cm)

The IRROMETER was first developed in 1951 to help growers improve irrigation efficiency. It provides the user with accurate information on soil moisture status regardless of soil type. The instrument measures in centibars (cb) or kilopascals (kPa) 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. OPERATING PRINCIPLE: The IRROMETER operates on the tensiometer principle, which measures soil water tension. 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 50 cb (kPa) indicates that the roots are extracting the same amount of moisture whether the crop is planted in sandy 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. MATERIALS: Butyrate body, ceramic tip, neoprene stopper. RESERVOIR SECTION DIMENSIONS: HEIGHT: 4.75in.(120mm)-5.125in.(130mm)including cap DIAMETER: 2in.(51mm)-2.15in.(55mm)including cap TUBE SECTION DIMENSIONS: LENGTH: Ranges from 6 in. to 60 in. (15 cm to 150 cm) (special lengths available) DIAMETER: .875 in. (22 mm) WEIGHT: 12 in. (30 cm) is .968 lb. (.439 kg) with increases of .252 lb. (.114 kg)