ES-2 Electrical Conductivity Sensor

The ES-2 Electrical Conductivity & Temperature Sensor is designed to measure the electrical conductivity (EC) and temperature of water in a pipe or tank. EC is useful for measuring salinity levels or quality of irrigation water.

The ES-2 can be installed in line with an irrigation pipe, in a water body, or in a tank.


RangeElectrical Conductivity: 0 to 120 dS/m

Temperature: -40 °C to 50 °C
ResolutionElectrical Conductivity: 0.001 dS/m

Temperature: 0.1 °C
AccuracyElectrical Conductivity: ± 0.01 dS/m or ± 10 % (whichever is greater)

Temperature: ± 1 °C
Operating Temperature-40 °C to 60 °C*

Sensors can be used at higher temperatures under some conditions. Contact METER for more details.
Power Requirements3.6 – 15 VDC, 0.03 mA quiescent, 0.5 mA during 300 ms measurement
DimensionsES-2 Housing: 2.2 cm Diameter, 11 cm length

ES-2F Housing: 1.5 cm Diameter, 9.2 cm length
Thread Requirements1/2 inch NPT thread
Measurement Time300 ms (milliseconds)
OutputSerial TTL, 3.6 Volts Levels or SDI-12
Connector Types3.5 mm (stereo) plug, or stripped & tinned lead wires (3)
Cable Length5 m standard; custom lengths available upon request
Data Logger Compatibility (Not Exclusive)METER ZL6, Em50/50G, EM60/60G,
Software CompatibilityECH2O Utility (rev 1.65+), DataTrac3 (rev 3.6+)
IncludedScrew-on protective cap for ES-2 use in tanks
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California requires the following notice

⚠️ WARNING: This product may contain chemicals including ethylene glycol, lead, nickel, styrene and cadmium, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov

ES-2 Electrical Conductivity Sensor