Specifications

Section 4. Sensor Installation

4.15 257 Soil Moisture Sensor

1. Soak the sensor end of the 257 in irrigation water for 12 to 14 hours.

Allow the sensor to dry for 1 to 2 days after soaking and repeat the

soak/dry cycle twice to improve sensor response. Always install a wet

sensor.

2. Install the sensor into soil representative of the field conditions you wish

to monitor. Avoid high or low spots. Placement south of the weather

station mast (northern hemisphere) will avoid the effects of the mast

shade. Installation in the root zone is best if measurements are used for

irrigation purposes.

3. The 257 should be removed from the soil prior to harvest or cultivation

operations to avoid damaging the sensor or sensor cable. Remove when

soil is moist.

JARO

FIGURE 4.15-1. 257 Soil Moisture Sensor

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