ES-2
Electrical Conductivity and Temperature Sensor
The ES-2 Electrical Conductivity and Temperature Sensor is designed to measure the electrical conductivity of water in a pipe or tank.  When you pair the new ES-2 with a TEROS 12 soil moisture sensor 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.
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Specifications
| GSA | View GSA details |
|---|---|
| Measurement Specifications | |
| Temperature | Range: –40 to 60 °C
Resolution: 0.1 °C Accuracy: ±1 °C |
| Bulk EC | Range: 0 to 120 dS/m
Resolution: 0.001 dS/m Accuracy: ±0.01 dS/m or ±10% (whichever is greater) |
| Communication Specifications | |
| Output | DDI serial or SDI-12 communication protocol |
| Data logger compatibility | METER ZL6 data loggers and any data acquisition system capable of 3.6- to 15-VDC power and serial or SDI-12 communication |
| Physical Specifications | |
| Dimensions | Length: 10.9 cm (4.30 in)
Width: 2.4 cm (0.95 in) Thread: 1/2-in National Pipe Thread |
| Operating temperature range | Minimum: –40 °C Maximum: 60 °C NOTE: Sensors may be used at higher temperatures under certain conditions; contact Customer Support for assistance. |
| In-line pipe connector type | 1-in Tee socket pipe fitting |
| Cable length | 5 m (standard)
75 m (maximum custom cable length)NOTE: Contact Customer Support if a nonstandard cable length is needed. |
| Connector types | 3.5-mm stereo plug connector or stripped and tinned wires |
| Electrical and Timing Characteristics | |
| Supply voltage (VCC to GND) | Minimum: 3.6 V
Maximum: 15.0 V |
| Digital input voltage (logic high) | Minimum: 2.8 V
Typical: 3.6 V Maximum: 5.0 V |
| Digital input voltage (logic low) | Minimum: –0.3 V
Typical: 0.0 V Maximum: 0.8 V |
| Digital output voltage (logic high) | Typical: 3.6 V |
| Power line slew rate | Minimum: 1.0 V/ms |
| Current drain (during measurement) | Minimum: 20 mA
Typical: 20 mA Maximum: 28 mA |
| Current drain (while asleep) | Typical: 0.03 mA |
| Power up time (DDI serial) | Maximum: 100 ms |
| Power up time (SDI-12) | Minimum: 100 ms
Typical: 200 ms Maximum: 250 ms |
| Power up time (SDI-12, DDI disabled) | Typical: 125 ms |
| Measurement duration | Typical: 25 ms
Maximum: 50 ms |
| COMPLIANCE | EM ISO/IEC 17050:2010 (CE Mark) |
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