Product specifications

DS6440 (Rev. E, 1/4/07)
2-15
Vantage Pro2
TM
Accessories
6440
Soil Moisture Sensor
For Wireless Soil Moisture/Temperature Station (# 6345)
The Watermark
®
Soil Moisture Sensor is an indirect, calibrated method of measuring soil water content. It is an
electrical resistance type sensor. The Soil Moisture/Temperature Station converts the electrical resistance reading
from the sensor into a calibrated reading of centibars of soil water suction with a range from 0 to 200 centibars.
The Watermark Soil Moisture Sensor is a product of the Irrometer Company, Inc.
General
Sensor Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrical resistance
Attached Cable Length . . . . . . . . . . . . . . . . . . . . . . . . . . 15' (4.6 m)
Cable Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Watermark standard, two-wire, wires stripped and tinned
Maximum Cable Length . . . . . . . . . . . . . . . . . . . . . . . . . 1000' (300 m) (18 AWG UF recommended)
Housing Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7/8" diameter x 3" (22 mm diameter x 76 mm)
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.6 oz. (103 g)
Sensor Output
Resolution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 cb
Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 200 cb
Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62.5 to 75 seconds
Package Dimensions
Product #
Package Dimensions
(Length x Width x Height)
Package Weight UPC Codes
6440
6.00" x 5.63" x 1.25"
(152 mm x 143 mm x 32 mm)
9 oz. (.3 kg) 011698 00330 3