DAVIS 6464, 6466 Instructions

Stand Alone Rain Collectors

6464 & 6466

The Rain Collector is designed to meet the guidelines of the World Meteorological Organization. Rain enters the collector
cone, passes through a debris-filtering screen, and collects in one chamber of the tipping spoon. The spoon tips when it has
collected an amount of water equal to the increment in which the collector measures (0.01" or 0.2 mm). As the spoon tips,
it causes a switch closure. The rain water drains out through the screened drains in the base of the collector.

The collector is designed for years of accurate, trouble-free service. The shape is aerodynamically designed to minimize
rainfall catch reduction caused by high winds. The body and base of the collector are constructed of tough, UV resistant
plastic.

The 6466 rain collector comes with a mounting base that can be mounted to a pole or post. The 6464 model has a flat surface
mount. 6466M and 6464M are factory-calibrated to report 0.2 mm per tip.

Specifications

Sensor Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Tipping spoon, 0.01" per tip for US versions, 0.2 mm for metric versions,

33.2 in2 (214 cm2) collection area

Attached Cable Length . . . . . . . . . . . . . . . . . . . . . . . . . . .40' (12 m)

Cable Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-conductor, 26 AWG

Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Modular connector (RJ-11)

Recommended Maximum Cable Length . . . . . . . . . . . . . .900' (270 m)

Housing Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .UV-stabilized ABS plastic

Dimensions

Rain Collector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.5" opening diameter (16.5 cm) x 9.5" (24 cm) high without bird spikes

Collection Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33.2 in2 (214 cm2)

Weight

6464 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 lbs. 3 oz. (1 kg)

6466 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 lbs. 14 oz. (1.8 kg)

Rainfall Accuracy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .For rain rates up to 10"/hr (250 mm/hr): ±3% of total or ± one tip of the

spoon (0.01"/0.2mm), whichever is greater.

Rain Rate Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±5% for rain rates up to 10"/hr (250 mm/hr)

Rain Rate Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.01" or 0.1 mm (user-selectable)

Input/Output Connections

Black. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Unused

Red. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Switch terminal

Green & Yellow . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Switch terminal

Rain Sensor Charts

Package Dimensions

Product #

6464

6466

Package Dimensions

(Length x Width x Height)

8.6" x 8.6" x 11.0"

(218 mm x 218 mm x 280 mm)

11" x 9.0" x10.0"

(280 mm x 229 mm x 254 mm)

Package Weight UPC Codes

2.3 lbs. (1.0 kg) 011698013326

3.9 lbs (1.8 kg) 011698013340

DS6464_6466 (Rev. A, 1/14/20)

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