Product Numbers: 6440, 6470
Davis Instruments Part Number: 7395.158
Soil Moisture Sensor & Multi-Purpose Temperature Probe Installation Manual
Rev A Manual (5/22/02)
Copyright ©2002 Davis Instruments Corp. All rights reserved.
3465 Diablo Avenue, Hayward, CA 94545-2778 U.S.A.
510-732-9229 • Fax: 510-732-9188
E-mail: [email protected] • www.davisnet.com
Removing the Sensors
1. When removing sensors prior to harvest in annual crops, it’s a good idea to
do this just after the last irrigation when the soil is moist.
2. Do not pull the sensor out by the wires. You may have to dig out, at least
partially, any sensors more than 12” deep or any sensors in dry soil. Careful
removal prevents sensor and sensor membrane damage.
3. When sensors are removed for winter storage, clean the sensors, dry them,
and place them in a clean, dry location.
Wiring Sensors
The soil moisture sensor and the temperature probe both come with a 15’
(4.6 m) cable.
• If additional wiring is required, up to 1000’ (300 m) of additional wire
can be spliced onto the sensor wire.
• The additional wire must be fully waterproof.
• We recommend using #18 gauge wire with UF insulation, and using a
3M Scotchpak or Duraseal heat shrink splice connector.
Note:
Avoid long wire runs near power cables. The transient currents can affect the
small current used to read the sensors.
Contacting Davis Instruments
(510) 732-7814
Technical Support, Monday – Friday, 7:00 a.m. – 5:30 p.m. Pacific
Time.
(510) 670-0589
Fax to Customer Service or Tech Support.
www.davisnet.com
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