EA-10 Soil Moisture Sensor Integrator’s Guide
1. Introduction
1
1. Introduction
Thank you for using the ECH
2
O EA-10 Dielectric
Soil Moisture sensor. The EA-10 sensor has a stan-
dard 2-wire, 4-20 mA analog interface for use with
industrial data acquisition and control systems. The
EA-10 has a very low power requirement and high res-
olution. This gives you the ability to make as many
measurements as you want over a long period of time
(i.e. a growing season), with minimal battery usage.
This guide covers the basics of integrating the EA-10
into an existing ECH
2
O system.
Specifications
Model:
ECH
2
O EA-10 Dielectric Soil Moisture
Sensor.
Electrical specs
:
Interface:
4-20 mA, 2-wire analog transmitter
Red: (+) supply; White: (-) supply; Shield: NC
Supply voltage:
line powered 7-32 Volt; DC
Overvoltage and reverse polarity protected
Sensor specs:
Measurement type:
Volumetric Water Content (VWC)
Measurement range:
typical 0 to 40 percent VWC
Measurement resolution:
depends on acquisition hardware
Measurement accuracy:
± 2% with soil specific calibra-
tion; accuracy at standard factory calibration varies
depending on soil type
