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Evaporation Station
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Evaporation Station
Built to be compatible with all standard National Weather Service evaporation measurements. This pan is normally installed on a wooden platform set on the ground in a grassy location. There are two commonly used procedures for making evaporation measurements. In both procedures a 10"D x 47-1/2"ID stainless steel pan is used to hold the water. The first procedure for measuring daily evaporation loss is to use a graduated hook gauge set on a still well to determine the level of the water’s surface at each measurement. The second procedure is to use a still well with a fixed point, and each time a measurement is taken, refill the pan with a calibrated graduate having a surface area 1/100th that of the pan up to the level of the point. The amount of water added is the equivalent evaporation.
Product Description
Since the amount of evaporation is a function of temperature, humidity, wind, and other conditions, in order to relate the evaporation to current or expected conditions, the maximum and minimum temperature of the water and the amount of air passage are normally recorded along with the evaporation. Submersible/floating type minimum/maximum thermometers are available for recording these temperatures.
Shown
Class A Evaporation pan: low carbon stainless steel, heliarc welded. 10"H x 47-1/2"ID.
Totalizing anemometer (Models 2510 and 2511): three-beaded conical type with 4" diameter cones. Six-digit counter with 0.1 mile or 0.1 km resolution. Aluminum construction with flange mount. 16"H x 12" diameter. Shipped motor freight.
Hook gauge: brass construction, 0.002" graduations. 7"L x 5-1/4" Diameter.
Still well (Model 6826): stainless steel with leveling screws. 9"H x 4" diameter.
Not Shown
Submersible/floating thermometer: U-tube maximum/minimum with magnet reset. Range: 20 F to 125 F (Stock #92592) or -20 C to +50 C (Stock #92591). Built-in solar radiation shield protects against direct sunlight and breakage. 11-1/4"L with floats.
Still well with fixed point (Model 6825): stainless steel. 9"H x 4" Diameter; height of point 7-1/2".
Replacement graduate: polycarbonate, graduated 0.01"/0.2 mm.
Item # Description Specs
92577 Model 6821 Class A Evaporation Pan
92592 20F to 125F
92578 Model 6831 Hook Gauge, English calibration
92591 -20C to +50C
92579 Model 6826 Still Well
92580 Model 6825 Still Well with fixed point
92581 Model 6833 Graduate, English calibration
92517 Model 2510 Totalizing Anemometer, registers each 0.1 mile of wind and electrical contact, with 33´ of cable
92518 Model 2511 Totalizing Anemometer, registers each 0.1 km of wind and electrical contact, with 33´ of cable
92519 Model 60050 Two-Conductor Cable (per ft.)