Decagon ES-2

Irrigation EC Sensor– salinity & temperature sensor

  • Continuous EC measurements in a pipe or tank
  • Ideal for irrigation nutrient monitoring
  • Check your EC values anywhere with an internet connection

The ES-2 Electrical Conductivity Sensor is designed to measure the electrical conductivity of water in a pipe or tank.  When you pair the new ES-2 with a GS3 in the soil, you’ll begin to develop a complete picture of the salts that are going into your system as well as the salts remaining in your soil or substrate.


feature specification
measurement range
Electrical Conductivity 0 to 120 dS/m
Temperature -40 to 50°C
measurement resolution
Electrical Conductivity 0.001 dS/m
Temperature 0.1°C
measurement accuracy
Electrical Conductivity ± 0.01 dS/m or ± 10 % (whichever is greater)
Temperature ± 1°C
general specifications
Operating Temperature -40° to 60°C
Power Requirements 3.6 - 15 VDC, 0.03 mA quiescent, 0.5 mA during 300 ms measurement
Dimensions 2.2 cm Diameter, 11 cm length
Thread Requirements 1/2 inch NPT thread
Measurement Time 300 ms (milliseconds)
Output SDI-12
Cable Length 5 m standard; custom lengths available upon request
Compatible Data Loggers Any SDI-12 enabled data logger